CLASS-T DIGITAL AUDIO AMPLIFIER EVALUATION BOARD USING DIGITAL POWER PROCESSING (DPP TM ) TECHNOLOGY

Tripath Technology, Inc. - Technical Information BRIDGED RB-TA3020-1, BRIDGED RB-TA3020-2, BRIDGED RB-TA3020-3 CLASS-T DIGITAL AUDIO AMPLIF IER EVA...
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Tripath Technology, Inc. -

Technical Information

BRIDGED RB-TA3020-1, BRIDGED RB-TA3020-2, BRIDGED RB-TA3020-3

CLASS-T DIGITAL AUDIO AMPLIF IER EVALUATION BOARD USING DIGITAL POWER PROCESSING (DPP TM ) TECHNOLOGY Technical Information - Board Rev 3.0

Revision 1.1 - June 2001

GENERAL DESCRIPTION

The Bridged RB-TA3020 evaluation board is based on the TA3020 digital audio power amplifier from Tripath Technology. This board is designed to provide a simple and straightforward environment for the evaluation of the Tripath TA3020 amplifier in bridged mode. This board is implemented in a bridged configuration for high power mono output. Note: There are three versions of the Bridged RB-TA3020, depending on nominal supply voltage and desired output power. Bridged RB-TA3020-1 – Nominal supply voltage +/-23V to +/-36V Bridged RB-TA3020-2 – Nominal supply voltage +/-30V to +/-48V Bridged RB-TA3020-3 – Nominal supply voltage +/-40V to +/-64V FEATURES

Ø Bridged RB-TA3020-1: 300W continuous output power @ 0.1% THD+N, 4Ω, +30V Ø Bridged RB-TA3020-2: 600W continuous output power @ 0.1% THD+N, 4Ω, +43V Ø Bridged RB-TA3020-3: 1200W continuous output power @ 0.1% THD+N, 4Ω, +60V Ø Outputs short circuit protected

1

BENEFITS

Ø Quick, easy evaluation and testing of the TA3020 amplifier in bridged mode Ø Uses only N-channel power MOSFETs Ø Ready to use in many applications: o Car Audio Amplifier o Powered Subwoofers o High Power Mono Amplifier

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

OPERATING INSTRUCTIONS Power Supply Description

There are four external power supplies required to operate this board: VPP, VNN, VN10, and V5 (see Figures 1 and 2). VPP and VNN power the load and so must each be able to provide half of the desired output power, plus about 20% for overhead and margin. The TA3020 amplifier also requires a supply, VN10, that is 10V more positive than VNN and tracks VNN. Though not required, the following powering-up sequence is usually adhered to during bench st nd rd evaluations: 1 ) V5 and VN10, 2 ) VNN and 3 ) VPP (refer to the Turn-on/off Pop section). The positive and negative supply voltages do not have to match or track each other, but distortion or clipping levels will be determined by the lowest (absolute) supply voltage. Figure 1 shows the proper supply configuration for the EB-TA3020.

VPP (yellow) V5 (red) VS

5V

AGND (black) PGND (blue)

VN10 (green)

VS 10V VNN (orange)

Note: To avoid signal degradation, the Analog Ground and Power Ground should be kept separate at the power supply. They are connected locally on the Bridged RB-TA3020-X. The two VPP yellow wires should be tied together and the two VNN orange wires should also be tied together.

Connector

Power Supply

J2 (Yellow)

VPP

J2 (Blue)

PGND

J2 (Orange)

VNN

J2 (Orange)

VNN

J2 (Green)

VN10

J2 (Yellow)

VPP

J1 (Red)

V5

J1 (Black)

AGND Table 1

2

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

Input Connections

Audio input to the board is located at INPUT (J200) (see Figures 2 and 3). The input can be a test signal or music source. An RCA cable is provided with a female 100mil connector to mate with J200. Output Connections

There are two output connectors on the reference board for the speaker output. The positive output is connected to J101 with a red wire attached. The negative output is connected to J202 with a black wire attached. The negative output is not a ground, but an output signal with equal amplitude and opposite phase compared to the positive output. Outputs can be any passive speaker(s) or test measurement equipment with resistive load (see Application Note 4 for more information on bench testing). Turn- on/off Pop

To avoid turn-on pops, bring the mute from a high to a low state after all power supplies have settled. To avoid turn-off pops, bring the mute from a low to a high state before turning off the supplies. The only issue with bringing up the V5 last, or turning it off first, is clicks/pops. If the mute line is properly toggled (slow turn-on, quick turn-off), then any power up sequence is acceptable. In practice, the V5 will usually collapse before VPP and VNN. The same holds true for the VN10 supply. It can collapse before VPP or VNN though this may cause a larger turn-off pop than if the mute had been activated before either the VN10 or V5 supply have collapsed. No damage will occur to the TA3020 if either the V5 or VN10 collapse before VPP or VNN.

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Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

E B-TA3020 BOARD

Output Transistors

Positive Output (red) Offset Adjustment Power In VPP (yel) PGND (blu) VNN (org) VNN (org) VN10 (grn) VPP(yel)

V5 (red) AGND (blk) Input Connector Break Before Make Jumpers Mute Jumper

Negative Output (blk)

Output Transistors

Figure 2

4

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

M102

M100

Technical Information

Offset Adjust

Tripath TA3020 AGND Input BBM1 BBM0 MUTE

M202

L200 C209

M200

M201

M203

C213

C211

- +

Audio Source

VNN VNN VN10 VPP Negative Output

- +

VNN

5V

- +

AGND V5 VPP PGND

10V

- +

VPP

C111

Positive Output

C113

L100

C109

M101

M103

Tripath Technology, Inc. -

Figure 3

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Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

E L E C T R I C A L C H A R A C T E RI S T I C S F O R B R I D G E D R B - T A 3 0 2 0 - 1

Unless otherwise specified, f = 1kHz, Measurement Bandwidth = 22kHz, RL = 4Ω, TA = 25 °C. All of the measurements are typical value. SYMBOL PO

PARAMETER

CONDITIONS

VALUE

RL = 4Ω RL = 2Ω RL = 4Ω RL = 2Ω

Output Power (Continuous Average/bridged load) Bridged RB-TA3020-1 +/-30V power supplies Switching Frequency of the Positive Output Switching Frequency of the Negative Output Quiescent Current of VN10 supply

THD+N = 0.1%

Quiescent Current of V5 supply

VIN = 0 V

45mA

VPPIq

Quiescent Current of VPP supply

VIN = 0 V

100mA

VNNIq

Quiescent Current of VNN supply

VIN = 0 V

100mA

η

Power Efficiency

89%

η

Power Efficiency

+/- 30V, P OUT = 500W, RL = 4Ω +/- 30V, P OUT = 850W, RL = 2Ω

Output Noise Voltage

A-Weighted, input AC grounded

215uV

+Freqs w -Freqs w VN10Iq V5I q

eOUT

VIN = 0 V

350W 600W 500W 850W 650kHz

VIN = 0 V

620kHz

VIN = 0 V

180mA

THD+N = 10%

83%

E L E C T R I C A L C H A R A C T E RI S T I C S F O R B R I D G E D R B - T A 3 0 2 0 - 2

Unless otherwise specified, f = 1kHz, Measurement Bandwidth = 22kHz, RL = 4Ω, TA = 25 °C. All of the measurements are typical value. SYMBOL

PARAMETER

PO

Output Power (Continuous Average/bridged load) Bridged RB-TA3020-2 +/-43V power supplies Output Power (Continuous Average/bridged load) Bridged RB-TA3020-2 +/-33V power supplies Switching Frequency of the Positive Output

THD+N = 0.1%

V IN = 0 V

640kHz

Switching Frequency of the Negative Output Quiescent Current of VN10 supply

V IN = 0 V

605kHz

V IN = 0 V

270mA

Quiescent Current of V5 supply

V IN = 0 V

45mA

VPPIq

Quiescent Current of VPP supply

V IN = 0 V VPP = +43V VNN = -43V

110mA

VNNIq

Quiescent Current of VNN supply

V IN = 0 V VPP = +43V VNN = -43V

110mA

η

Power Efficiency

88%

η

Power Efficiency

+/- 43V, = 1000W, = 4Ω +/- 33V, P OUT = 900W, RL = 2Ω

Output Noise Voltage

A-Weighted, input AC grounded

300uV

PO

+Freqs w -Freqs w VN10Iq V5I q

eOUT

6

CONDITIONS

VALUE

THD+N = 10%

RL = 4 Ω RL = 2 Ω RL = 4 Ω

710W 950W 1000W

THD+N = 0.1% THD+N = 10%

RL = 2 Ω RL = 2 Ω

650W 900W

P OUT

RL

83%

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

E L E C T R I C A L C H A R A C T E RI S T I C S F O R B R I D G E D R B - T A 3 0 2 0 - 3

Unless otherwise specified, f = 1kHz, Measurement Bandwidth = 22kHz, RL = 4Ω, TA = 25 °C. All of the measurements are typical value.

SYMBOL

PARAMETER

PO

Output Power (Continuous Average/bridged load) Bridged RB-TA3020-3 +/-60V power supplies Output Power (Continuous Average/bridged load) Bridged RB-TA3020-3 +/-43V power supplies Switching Frequency of the Positive Output

THD+N = 0.1% THD+N = 10%

RL = 4 Ω RL = 4 Ω

1350W 1800W

THD+N = 0.1% THD+N = 10%

RL = 2 Ω RL = 2 Ω

1350W 1500W

VIN = 0 V

630kHz

Switching Frequency of the Negative Output Quiescent Current of VN10 supply

VIN = 0 V

600kHz

VIN = 0 V

290mA

Quiescent Current of V5 supply

VIN = 0 V

45mA

VPPIq

Quiescent Current of VPP supply

VIN = 0 V VPP = +60V VNN = -60V

130mA

VNNIq

Quiescent Current of VNN supply

VIN = 0 V VPP = +60V VNN = -60V

140mA

η

Power Efficiency

87%

η

Power Efficiency

+/- 60V, = 1800W, = 4Ω +/- 43V, P OUT = 1200W, RL = 2Ω

Output Noise Voltage

A-Weighted, input AC grounded

400uV

PO

+Freqs w -Freqs w VN10Iq V5Iq

eOUT

7

CONDITIONS

P O UT

RL

VALUE

84%

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-1

THD+N vs Output Power

THD+N vs Output Power 10

10

5

5

f = 1kHz BBM = 80nS Vs= +/- 30V RLoad = 4Ω BW = 22Hz - 22kHz

2 1

2 1 THD+N (%)

0.5 THD+N (%)

f = 1kHz BBM = 80nS Vs = +/-30V RLoad = 2 Ω BW = 22Hz - 22kHz

0.2 0.1 0.05

0.5

0.2 0.1

0.02 0.01

0.05

0.005 0.02 0.002 0.001

0.01 1

2

5

10

20 50 Output Power (W)

100

200

500

1

2

5

THD+N vs Frequency

2 1

BBM = 80nS Vs= +/- 30V Pout = 150W RLoad = 4Ω BW = 20Hz - 20kHz

200

500

1k

5 BBM = 80nS Vs = +/-30V Pout = 150W RLoad = 2Ω BW = 22Hz - 22kHz

2 1 0.5 THD+N (%)

THD+N (%)

100

10

0.5 0.2 0.1 0.05 0.02

0.2 0.1 0.05 0.02

0.01

0.01

0.005

0.005

0.002

0.002

0.001 20

50

100

200

500 1k Frequency (Hz)

2k

5k

10k

0.001 20

20k

50

100

Efficiency vs Output Power 100.00

90

90.00

80

80.00

70

70.00

60 50 40 f = 1kHz BBM = 80nS Vs = +/- 30V Rload = 4 Ω

30 20

200

500 1k Frequency (Hz)

2k

5k

10k

20k

900

1000

Efficiency vs Output Power

100

Efficiency (%)

Efficiency (%)

20 50 Output Power (W)

THD+N vs Frequency

10 5

10

60.00 50.00 40.00 30.00

f= 1kHz BBM = 80nS Vs = +/-30V Rload = 2Ω

20.00 10.00

10

0.00

0 0

50

100

8

150

200

250

300 350 400 Output Power (W)

450

500

550

600

650

0

100

200

300

400

500

600

700

800

Output Power (W)

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-2

THD+N vs Frequency

THD+N vs Output Power 10

10

5

f = 1kHz BBM = 120nS Vs = +/- 43V RLoad = 4 Ω BW = 22Hz-22kHz

2 1

2

0.5 THD + N (%)

f = 1kHz BBM = 120nS Vs= +/- 43V RLoad = 2Ω BW = 22Hz - 22kHz

5

1 THD+N (%)

0.2 0.1 0.05 0.02

0.5

0.2 0.1

0.01 0.05

0.005 0.002 0.001

0.02 1

2

5

10

20

50 100 Output Power (W)

200

500

1k

2k

0.01

1

2

5

10

THD+N vs Frequency

50 100 Output Power (W)

200

500

1k

2k

THD+N vs Frequency

10

10

5

5

BBM = 120nS Vs= +/- 43V Pout = 200W RLoad = 4Ω BW = 22Hz - 22kHz

2 1

2 1

0.5

BBM = 120nS Vs= +/- 43V Pout = 200W RLoad = 2 Ω BW = 22Hz - 22kHz

0.5 THD+N (%)

THD+N (%)

20

0.2 0.1 0.05

0.2 0.1 0.05

0.02

0.02

0.01

0.01

0.005

0.005

0.002

0.002

0.001 20

50

100

200

500 1k Frequency(Hz)

2k

5k

10k

20k

0.001 20

50

100

200

500 1k Frequency (Hz)

2k

5k

10k

20k

Efficiency vs Output Power

Efficiency vs Output Power 100

90

90

80

80 70 60 60

Efficiency (%)

Efficiency (%)

70

50 40

50 40 30

30 f = 1kHz BBM = 120nS Vs = +/-43V Rload = 4 Ω

20 10

f = 1kHz BBM = 120nS Vs = +/- 43V Rload = 2 Ω

20 10

0

0 0

100

200

300

400

500

600

700

800

Output Power (W)

9

900 1000 1100 1200 1300 1400

0

100

200

300

400

500

600

700

800

900

1000

Output Power (W)

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-2

THD+N vs Output Power

THD+N vs Frequency 10

10 5

2 1

1

0.5

0.5

0.2

THD+N (%)

THD + N (%)

2

5

f = 1kHz BBM = 120nS Vs= +/- 33V RLoad = 2 Ω BW = 22Hz - 22kHz

0.2

0.1

BBM = 120nS Vs= +/- 33V Pout = 200W RLoad = 2 Ω BW = 22Hz - 22kHz

0.1 0.05 0.02 0.01

0.05

0.005 0.02 0.01 1

0.002 2

5

10

20 50 Output Power (W)

100

200

500

1k

0.001 20

50

100

200

500 1k Frequency (Hz)

2k

5k

10k

Efficiency vs Output Power 90.00

80.00

70.00

Efficiency (%)

60.00

50.00

40.00

30.00

f = 1kHz BBM = 120nS Vs = +/- 33V Rload = 2 Ω

20.00

10.00

0.00 0.00

200.00

400.00

600.00

800.00

1000.00

Output Power (W)

10

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

20k

Tripath Technology, Inc. -

Technical Information

T YPICAL PERFORMANCE FOR BRIDGED RB-TA3020-3

THD + N vs Output Power

THD + N vs Output Power

10 5 2

10 5

f = 1kHz BBM = 120nS Vs = +/- 60V RLoad = 4Ω BW = 22Hz-22kHz

2 1 THD + N (%)

THD + N (%)

1 0.5 0.2

0.5 0.2

0.1

0.1

0.05

0.05

0.02

0.02

0.01 1

f = 1kHz BBM = 120nS Vs = +/- 60V RLoad = 2Ω BW = 22Hz-22kHz

2

5

10

20 50 100 Output Power (W)

200

500

1k

0.01 1

2k

2

5

10

5 BBM = 120nS Vs = +/- 60V Pout = 300W RLoad = 4 Ω BW = 22Hz-22kHz

2 1

500

1k

2k

10k

20k

BBM = 120nS Vs = +/- 60V Pout = 300W RLoad = 2Ω BW = 22Hz-22kHz

0.5 THD + N (%)

0.5 THD + N (%)

200

10

5

0.2 0.1 0.05 0.02

0.2 0.1 0.05 0.02

0.01

0.01

0.005

0.005

0.002

0.002

0.001 20

50

100

200

500

1k

2k

5k

10k

0.001 20

20k

50

100

Frequency (Hz)

90

90

80

80

70

70

60 Efficiency (%)

100

60 50 40

20

500 1k Frequency (Hz)

2k

5k

50 40 30

f = 1kHz BBM = 120nS Vs = +/-60V Rload = 4Ω

30

200

Efficiency vs Output Power

Efficiency vs Output Power

Efficiency (%)

100

THD + N vs Frequency

THD + N vs Frequency

1

50

Output Power (W)

10

2

20

f = 1kHz BBM = 120nS Vs = +/- 60V Rload = 2Ω

20 10

10

0

0 0

200

400

600

800

1000

1200

Output Power (W)

11

1400

1600

1800

2000

0

200

400

600

800

1000

1200

1400

Output Power (W)

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-3

THD+N vs Output Power

THD+N vs Frequency

10 5

2

10 f = 1kHz BBM = 120nS Vs= +/- 43V RLoad = 2 Ω BW = 22Hz - 22kHz

5

2 1 THD+N (%)

THD+N (%)

1 0.5

0.2

0.5

0.2

0.1

0.1

0.05

0.05

0.02

0.02

0.01 1

BBM = 120nS Vs= +/- 43V Pout = 300W RLoad = 2Ω BW = 22Hz - 22kHz

2

5

10

20

50

100

200

500

1k

2k

Output Power (W)

0.01 20

50

100

200

500 1k Frequecy (Hz)

2k

5k

10k

20k

Efficiency vs Output Power 90.00

80.00

70.00

Efficiency (%)

60.00

50.00

40.00

30.00

f = 1kHz BBM = 120nS Vs = +/- 43V Rload = 2Ω

20.00

10.00

0.00 0.00

200.00

400.00

600.00

800.00

1000.00

1200.00

1400.00

1600.00

Output Power (W)

12

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

Safe Operating Areas

The TA3020 must always remain in the safe operating area in order to ensure a robust and reliable design. The Bridged RB-TA3020-X boards have been optimized for 4Ω and 2Ω load applications. All three of the Bridged RB-TA3020-X boards have been designed to be 1Ω stable, however the current limit has been set by the OCR resistors (R111 and R211) to not allow the output to achieve maximum power in order to remain in the safe operating area. If a 1Ω load is connected to the output, the amplifier will continue to function but will go into an overcurrent mode when driving a presumable amount of power. For the Bridged RB-TA3020-1 board with a 1Ω load connected to the output, the amplifier will enter the overcurrent mode and shutoff at approximately 500W. For the Bridged RB-TA3020-2 board with a 1Ω load connected to the output, the amplifier will enter the overcurrent mode and shutoff at approximately 800W. For the Bridged RB-TA3020-3 board with a 1Ω load connected to the output, the amplifier will enter the overcurrent mode and shutoff at approximately 675W. To reset the amplifier after an overcurrent condition, the mute pin (pin 24) must be toggled or the power supplies must by cycled off and on to enable the amplifier. The Bridged RB-TA3020-1 is optimized for a +/-30V power supply and will function from a minimum of +/-23V to a maximum of +/-36V. At +/-30V the Bridged RB-TA3020-1 will sufficiently drive a 4Ω and 2Ω load as shown in the Typical Performance graphs. The Bridged RB-TA3020-2 is optimized for a +/-43V power supply and will function from a minimum of +/-30V to a maximum of +/-48V. At +/-43V the Bridged RB-TA3020-2 will sufficiently drive a 4Ω and 2Ω load as shown in the Typical Performance graphs. However with 2Ω load conditions the amplifier will shutdown if pushed beyond 1200W. In order for the amplifier to achieve the full output signal swing, the power supply must be reduced to +/- 33V. This will allow the amplifier to achieve 950W at 10% THD+N with a 2Ω load. The Bridged RB-TA3020-3 is optimized for a +/-60V power supply and will function from a minimum of +/-40V to a maximum of +/-64V. At +/-60V the Bridged RB-TA3020-3 will sufficiently drive a 4Ω and 2Ω load as shown in the Typical Performance graphs. However, with a 2Ω load, the amplifier will shutdown if pushed beyond 1500W. In order for the amplifier to achieve the full output signal swing, the power supply must be reduced to +/- 43V. This will allow the amplifier to achieve 1500W at 10% THD+N with a 2Ω load. These limitations placed on the amplifier are to ensure the system will remain in the safe operating area. Changing the values of the OCR resistors (R211 and R111) will change the overcurrent trip point and thus increase or reduce output power. It is not recommended to increase the overcurrent trip point to increase the output power, otherwise reliability will be reduced in the system. For formulas on how to set the overcurrent trip point, please refer to the TA3020 datasheet. The safe operating area is dependent upon the power dissipation, the operating ambient temperature and the heatsinking. As an example, if the Bridged RB-TA3020-3 board is operating at +/-60V with a 2Ω load. At 400W the amplifier is 68% efficient and the eight output FETs will be dissipating approximately 133W. Each of the output FETs will be dissipating approximately 17W. O To operate at an ambient temperature of 20 C, the heatsink needs to be be able to keep the O output FETS below the maximum junction temperature of 150 C. (Maximum Junction Temperature for Output FETs – ambient temperature)/Power dissipated = θJA of the heatsink O

O

O

150 C - 20 C = 130 C O O 130 C / 133W = 0.98 C/W

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Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

O

In order to run the amplifier at 400W into a 2Ω load continuously at 20 C for an infinite amount of O time, a θJA of 0.98 C/W heatsink is required. In an application such as a car audio trunk mounted amplifier, where the ambient temperature O can run up to 85 C: O

O

O

150 C - 85 C = 65 C O

O

65 C / 133W = 0.49 C/W O

A θJA of 0.49 C/W heatsink is required in order to operate the amplifier at 400W into a 2Ω load O continuously at 85 C for an infinite amount of time. The θJA of every heatsink indicates the thermal properties for an infinite amount of time, therefore a characterization of each heatsink should be done to plot the θJA vs time. This will provide information for the heatsink characteristics for power dissipation capabilities for a given finite amount of time. A system fan can be used to help increase the efficiency of the heatsink. Additional FETs cannot be added to the RB-TA3020-2 and RBTA3020-3 boards to help the power dissipation because the TA3020 cannot reliably drive more than 150nC.

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Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

ARCHITECTURE

A block diagram of the evaluation board is shown in Figure 4. The major functional blocks of the amplifier are described below. Positive Output In

Input Stage

TA3020-65

Output Section Negative Output

Figure 4

Note: The negative output is identical to the positive output with 180 degrees phase shift. Input Stage

Figure 5 shows Input Stage before the TA3020. The TA3020 amplifier is designed to accept unbalanced inputs. For the Bridged RB-TA3020-1, the gain is 12.2 V/V differentially, or approximately 22 dB. For the Bridged RB-TA3020-2, the gain is 16.8 V/V differentially, or approximately 24.5 dB. For the Bridged RB-TA3020-3, the gain is 23.8 V/V differentially, or approximately 27.5 dB. Please note that the input stage of the TA3020 is biased at approximately 2.5VDC. For an input signal centered at ground (0VDC), the polarity of the coupling capacitor, CIN , shown in Figure 5 is correct.

CIN RIN 4.7uF 49.9KΩ +

IN2 20

+

RF 20KΩ VP2 21

BIASCAP 19 CB 0.1uF

V5 499KΩ

499KΩ

VP1 26

10KΩ Pot

RF 20KΩ

0.1uF

IN1 25

+ -

RIN1 20KΩ

Figure 5

The audio signal is input through pin 20 and fed through an inverting op amp. The output of this op amp (pin 21) is tied to the input a unity gain inverting op amp. This configuration of cascading 15

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

two inverting op amps results in two input signals to the amplifier of equal amplitude and 180 degrees phase shift without the need of an external op amp. The value of the input capacitor, CIN , in Figure 5 (labeled C200 on the schematic), and the input resistor, RIN (labeled R200 on the schematic), sets the –3dB point of the input high-pass filter. The frequency of the input high pass pole, F3dB, –3dB point can be calculated as follows:

F3dB = 1/(2π x CIN x RIN ) where: CIN = input capacitor value in Farads RIN = input resistor value in Ohms

Output offset voltages can be nulled by adjusting the 10kΩ potentiometer shown in Figure 5. Once set, the offset does not typically drift with temperature, so no tracking circuitry is required. Offsets can typically be set to +/- 25 mV. The output offset is trimmed differentially across the positive and negative outputs, thus only one channel needs the offset trimmed. If a different TA3020 is placed in the Bridged RB-TA3020 evaluation board, the offset would need to be retrimmed. EB-TA3020 Control Circuitry

The MUTE pin is brought out to an external 2-pin header, J3 (Figure 6). When a jumper is installed from Pin 1 to 2 of J3, the MUTE line is pulled to ground and the outputs are enabled. Note that if the MUTE jumper is removed, the MUTE pin floats high, and the amplifier is muted.

ROCR OCR1

33

+5V R111

BBM0

22

J5

J3 MUTE

24

C116

AGND

OCR2

31

R211

+5V 23

BBM1

J4

C216

Figure 6

The resistors, ROCR in Figure 6 (labeled R111 and R211 in the schematic), set the overcurrent threshold for the output devices. Note that these are NOT the sense resistors (the overcurrent sense resistors, RS, are in the output stage). By adjusting the ROCR resistor values, the threshold at which the amplifier “trips” can be changed. The range that the overcurrent trip point can be adjusted (by changing ROCR) is determined by the value of the sense resistors. ROCR on this evaluation board is pre-set for a 4Ω and 2Ω bridged load application. For lower impedance applications (i.e. 1Ω bridged), this board’s overcurrent will trip. This is indicated by the amplifier going into mute and the HMUTE pin will latch to 5V; to clear this condition, toggle the mute or cycle the power. To reduce overcurrent sensitivity, decrease the value of ROCR until the sensitivity meets the desired level. ROCR can be reduced though this may result in an overcurrent threshold that is so high the amplifier will try to drive a short circuit, possibly damaging the output FETs. Finally, the Break-Before-Make (or “BBM”) lines are used to control the “dead time” of the output FETs. The “dead time” is the period of time between the turn-off of one device and the turn-on of 16

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

the opposite device on the same channel. If the two devices are both on at the same time, current “shoots through” from one supply to the other, bypassing the load altogether. Obviously, this will have a great impact on the overall efficiency of the amplifier. However, if the dead time is too long, linearity suffers. The optimum BBM setting will change with different output FETs, different operating voltages, different layouts and different performance requirements. For this reason, Tripath has provided a means to adjust the BBM setting among four preset levels by moving jumpers J2 and J3 on their 3-pin headers (see Figure 6). These settings should be verified over the full temperature and load range of the application to ensure that any thermal rise of the output FETs and TA3020 does not impact the performance of the amplifier. The RB-TA3020-1 and RBTA3020-2 amplifier boards is set to 80nS and the RBTA3020-3 is set to 120nS. The table below shows the BBM values for various settings of the jumpers (Figure 7).

1) 2) 3) 4)

BBM1

BBM0

Delay

0 0 1 1

0 1 0 1

120nS 80nS 40nS 0nS

J5

J4

0

0

1

1 BBM0

BBM1

Note: The jumper setting shown is 80nS. Figure 7

Auto Recovery Circuit for Overcurrent Fault Condition

If an overcurrent fault condition occurs the HMUTE pin (pin 15) will be latched high and the amplifier will be muted. The amplifier will remain muted until the MUTE pin (pin 24) is toggled high and then low or the power supplies are turned off and then on again. The circuit shown below in Figure 8 is a circuit that will detect if HMUTE is high and then toggle the mute pin high and then low, thus resetting the amplifier. The LED, D1 will turn on when HMUTE is high. The reset time has been set for approximately 2.5 seconds. The duration of the reset time is controlled by the RC time constant set by R306 and C311. To increase the reset, time increase the value of C311. To reduce the reset time, reduce the value of C311. Please note that this circuit is optional and in not included on the RB-TA3020-X boards.

17

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

V5

D1 R311 LED 1kΩ, 5%

R306 510kΩ, 5%

R307 10kΩ, 5%

R309 1kΩ, 5%

R308 10kΩ, 5%

Q305 2N3906

R311 1kΩ, 5%

HMUTE Pin 15

R311 1kΩ, 5%

MUTE Pin 24 C311 10uF, NP Q302 2N3904

Q303 2N7002

Jumper Q304 2N3904

R310 1kΩ, 5%

remove jumper to enable mute

AGND

Figure 8

Output Section

The output section includes the gate resistors, gate diodes, source resistors, FETs, output filters, the previously mentioned over voltage sense resistors, a Zobel Network, the common mode capacitor, the common mode zobel network and various bypass capacitors. Figure 8 below shows the output stage of the positive output of this amplifier. The negative output section was not included in order to simplify the explaination of the output section. The negative output section will be symmetrical in terms of component values, component placements, and overall functionality. OCS1HN

R115 0.01Ω

D104

HO1COM

R118 499k Ω

5.6Ω

C108 0.1uF

R124 D105

VPP

M100

R113

HO1

OCS1HP

C110 0.1uF

C111 330uF

C109 330uF

5.6Ω M101

R114

LO1

LO1COM

R119 499k Ω

5.6Ω R125 L100 11uH

5.6 Ω

AMPOUT 1 D106 M102

C117 0.22uF

C114 0.1uF

R120

R128 20Ω

5.6Ω R126 D107

5.6Ω M103

R121 5.6Ω R127

R115 0.01Ω

VNN

5.6Ω C112 0.1uF OCS1LN

OCS1LP

C113 330uF

Figure 9

18

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

The gate resistors (labeled R113, R114, R120, and R121 in Figure 9 and the attached schematic) are used to control MOSFET switching rise/fall times and thereby minimize voltage overshoots. They also dissipate a portion of the power resulting from moving the gate charge each time the MOSFET is switched. If RG is too small, excessive heat can be generated in the driver. Large gate resistors lead to slower gate transitions resulting in longer rise/fall times and thus requiring a larger BBM setting. The gate diodes (D104, D105, D106, D107) are used to reduce the fall time at the gate of the output FETs. This allows us to use the 5.6Ω gate resistor, which increases the rise time of the gate, reduces switching noise at the output FETs and reduce the overall noise floor of the amplifier. The source resistors (R124, R125, R126, R127) are recommended to protect the TA3020 from any overvoltage damage. The source resistors provide protection to the HO1COM and LO1COM pins due to the large overshoots and undershoots of the switching waveform that can occur at the output during high power operation. R118 and R119 are gate pull down resistors to ensure the output FETs remain off if VPP and VNN are powered on and the TA3020 is not powered on. 499kΩ is the ideal value for these resistors. Larger values of R118 and R119 can cause the gate of the output FETs to float and smaller values of R118 and R119 will affect the drive capabilities of the HO1 and LO1 pins. The output FETs (M100, M101, M200 and M201) provide the switching function required of a Class-T design. They are driven directly by the TA3020 through the gate resistors. M100 and M102 are placed in parallel and provide the high side drive of the output stage. M101 and M103 are in parallel and provide the low side drive of the output stage. The FETs are required to be placed in parallel for the purposes of higher current handling capability and improved power dissipation. (Note: Bridged RBTA3020-1 does not have M101 and M103 and it’s associated components because it has a lower power output) The devices used on the evaluation board are STW34NB20 MOSFETs. The TA3020 data sheet contains information on output FET selection as well as Tripath application notes “FETs – Selection and Efficiency” and “Designing with Switching Amplifiers for Performance and Reliability”. The output filter L100/C114 is the low-pass filter that recovers the analog audio signal. One of the benefits of the Class-T design is the ability to use output filters with relatively high cutoff frequencies. This greatly reduces the speaker interactions that can occur with the use of lowerfrequency filters common in Class-D designs. Also, the higher-frequency operation means that the filter can be of a lower order (simpler and less costly). The OEM may benefit from some experimentation in the filter design, but the values provided in the reference design, 11uH, 0.1uF, 0.22uF (nominal resonant frequency of 65kHz), provide excellent results for most loads between 2Ω and 4Ω. Figure 10 below shows the SPICE simultion results for the output filter used on the Bridged RB-TA3020-3 board with a 4Ω load. Figure 11 below shows the SPICE simulation results for the output filter used on the Bridged RB-TA3020-3 board with a 2Ω load. The Y axis of the graph is in units of dB referred to 1V. The X axis of the graph is in units of Hz. All of the Bridged RB-TA3020-X boards will have the same frequency response, however the gains will be different.

19

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

Figure 10

Figure 11

As important as the values themselves, the material used in the core is important to the performance of the filter. Core materials that saturate easily will not provide acceptable distortion or efficiency figures. Tripath recommends a low-mu core, like type 2 iron powder core. Micrometals, (www.micrometals.com), is a main supplier of iron powder cores. The core part number used on the Bridged RB-TA3020-1 and the Bridged RB-TA3020-2 is T106-2. The core part number used on the Bridged RB-TA3020-3 is T157-2. The Zobel circuit R128/C117 is used in case the amplifier is powered up with no load attached. The Q of the LC output filter, with no load attached, rises quickly out to 80kHz. Resonant currents 20

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

in the filter and ringing on the output could reduce the reliability of the amplifier. The Zobel eliminates these problems by reducing the Q of the network significantly above 50kHz. Modifying the LC output filter will require a recalculation of the Zobel value, and depending on the application, the power capability of R117 and R217 may need to be increased to 10W from 5W. The components used on the evaluation board should be adequate for most applications.

C5 0.22uF AMPOUT 2

AMPOUT 1

R6 20Ω, 5W

C6 0.22uF

Figure 12

Figure 12 shows the differential filter network. The differential capacitor, C5, is used to reduce any of the differential switching components between the positive and negative outputs. Similar to the zobel circuit, the common mode zobel network, is used in case the amplifier is powered up with no load attached to the output. The common mode LC output filter formed by L100, L200 and C5 has a Q that rises quickly out to 80kHz. Common mode resonant currents in the filter and ringing on the output could reduce the reliability of the amplifier. This common mode zobel network reduces the Q of the common mode LC output filter significantly above 50kHz. The bypass capacitors C108/C109 are critical to the reduction of ringing, overshoots, and undershoots on the outputs of the FETs. These parts are placed as closely as possible to the leads of the FETs, and the leads of the capacitors themselves are as short as practical. Their values will not change with different output FETs. Differences between the Bridged RB- TA3020- X boards

The Bridged RB-TA3020-X boards can be directly implemented into a system. They were intended to be scalable and modular to help simplify the manufacturing of multiple systems with varying output power. This is the reason there are three boards for three different power levels that use identical PC boards. The differences between the three boards are changes in resistor values and capacitor voltages. Please refer to the bill of materials that is attached at the end of this document for the actual values of components used for each board.

DOCUMENTATION

Schematics and layout in software or paper form can be provided upon request.

21

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

Tripath Technology, Inc. -

Technical Information

ADVANCED INFORMATION This is a product in development. Tripath Technology, Inc. reserves the right to make any changes without further notice to improve reliability, function and design. Tripath and Digital Power Processing are trademarks of Tripath Technology, Inc. Other trademarks referenced in this document are owned by their respective companies. Tripath Technology, Inc. reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Tripath does not assume any liability arising out of the application of use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. TRIPATH’S PRODUCT ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN CONSENT OF THE PRESIDENT OF TRIPATH TECHONOLOGY, INC. As used herein: 1.

2.

Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in this labeling, can be reasonably expected to result in significant injury of the user. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

For more information on Tripath products, visit our website at www.tripath.com World Wide Sales Offices

United States Southeast Asia Japan Europe

Jim Hauer Jim Hauer Osamu Ito Steve Tomlinson

[email protected] [email protected] [email protected] [email protected]

408.567.3089 408.567.3089 81.42.334.2433 44.1672.514.620

TRIPATH TECHNOLOGY, INC 3900 Freedom Circle Santa Clara CA 95054 408.567.3000 www.tripath.com

Revision Revision#

Heading

Date

Description

Board 3.0, Rev1.1

Value confirmation + minor board changes

07/20

TBD numbers confirmed

22

Bridged RB-TA3020-1-3 – MC/1.1/07-01, EAD008

1

2

3

4

5

6

D

D VPP

C211 390uF/50V

VNN

R215 0.01OHM/1W C210 C208 0.1uF/250V/EF 0.1uF/250V/EF

R115

C8 100uF/16V

D204 NS

M200 NS

I1 VN10

1

R213

D104 NS

VN10

LO1

48

2

J202 M201 STW34NB20

3

R214

4

2

HO2COM

HO1

HO2

OCS1HN

CON4 FB1

44 R125 C105 0.1uF/250V/EB

5.6OHM/1W 1

6

7

OCS2LN

OCS1HP

1

43

OCS2LP

OCS1LP

OCS2HP

OCS1LN

D106 1N914

42 C106 0.1uF/250V/EB

R220

R228 20OHM/5W

8

5.6OHM/1W

PGND2

M203 NS

5.6OHM/1W D207 NS

C204 47uF/25V

OCS2HN

VBOOT1

R120

VBOOT2

VNN

220OHM

C103 0.1uF

10

R126

40

39

5.6OHM/1W D107 NS

VNN

R221 C209 330uF/100V

VNN

C213 390uF/50V

R216 0.01OHM/1W

R128 20OHM/5W PGND1

C104 47uF/25V

D202 MURS120T3

C203 0.1uF

AMPOUT1 C117 0.22uF/100V/PPS

C114 0.1uF/100V/PPS

5.6OHM/1W D102 MURS120T3

9 220OHM

2

M102 STW34NB20

R112

41

C205 0.1uF/250V/EB

R212

R226 C

L100 11uH

5.6OHM/1W

C206 0.1uF/250V/EB

D206 1N914

M101 STW34NB20

R114

45

5.6OHM/1W 5

M202 STW34NB20

J102

NS D105 1N914

46

R218 510K

R225

C214 0.1uF/100V/PPS

HO1COM

47

R118 510K

5.6OHM/1W

C217 0.22uF/100V/PPS

LO2COM

C111 390uF/50V

R124

NS D205 1N914

CON4

AMPOUT2

LO1COM

C110 0.1uF/250V/EF

C108 0.1uF/250V/EF

NS

R219 C207 510K 0.1uF

FB2 L200 11uH

LO2

R119 510K

VPP

0.01OHM/1W

R113 C107 0.1uF

NS

R224

M100 NS

C M103 NS

R121

NS

V5

R227 NS R106

11

R105 1K,1%

C212 0.1uF/250V/EF

NC

AGND

FB1

12

OCRNT2 7.5K,1% C102 150pF

NC

NS

38

OCR2

OCR1

37

C109 330uF/100V

R127 NS

AGND

R116 0.01OHM/1W

VNN

OCRNT1 C112 0.1uF/250V/EF

R107 1.15K,1%

FN1

13

FBKOUT1

NC

FBKGND1

V5

C113 390uF/50V

36 AGND

AGND

14

35

V5

BRIDGED OUTPUT C3 0.1uF

15

HMUTE

HMUTE

DGND

V5

R206

C5 AMPOUT2

34 AGND

R205 1K,1%

FN2

16

FBKOUT2

OCR1

33

17 R207 1.15K,1%

R208 1K,1%

R209

DCOMP

REF1

32

R1 8.25K,1%

AGND FP2

PGND2

18

FBKGND2

OCR2

R210 1.15K,1%

AGND

19

BIASCAP

VNNSENSE

OCRNT2

AGND C200 4.7uF

R200 49.9K,1%

AGND

R211 13.3K,1%

B

VNN

30

0.1uF

J200

J101 SCRWTERM

C6

AGND

C216 220pF

C4

R6

20OHM/5W 0.22uF/100V/PPS

R111 13.3K,1%

31

7.5K,1%

B

AMPOUT1 0.22uF/100V/PPS

OCRNT1 C116 220pF

FB2 7.5K,1% C202 270pF

J201 SCRWTERM

R3 237K,1%

AGND

AGND IN2

R201 20K,1%

20

INV2

VPPSENSE

29

VPP

C201 33pF

J5

R9 715K,1%

R5 261K,1% VP2 21

OAOUT2

AGND

C1 AGND 0.1uF

V5

22

SET BBM0 T0 1

BBM0

V5

BBM1

OAOUT1

27

J2

VPP VN10 VNN

28 R4 261K,1%

V5

CON6 V5

J4 23

SET BBM1 T0 0

24

J3 MUTE REMOVE J3 SHUNT TO ENABLE MUTE

MUTE

INV1

5V INPUT CONNECTOR J1 V5

26 C101 33pF

R7 1K

25

R101 20K,1%

IN1

R100

VP2

AGND

20K,1% AGND

TA3020

L1 FBEAD 1

R103

R102

2 510K

510K C120 0.1uF

AGND

A

V5

OFFSET TRIM R104 10K POT

A

AGND

Title

TA3020 BRIDGED REFERENCE BOARD - 1 - 23V TO 36V Size

Number

Revision

3.0

C Date: File: 1

2

3

4

5

12-Jul-2001 Sheet of C:\LAYOUTS\TA3020\3020SUB3\BR3020_1.SCH Drawn By: 6

C:\LAYOUTS\TA3020\3020SUB3\BR3020_1.BOM 11:13:42 12-Jul-2001

Bill of Material for Bridged RB-TA3020-1, Rev 3.0 Used ==== 4 8 2 4 6 4 3 1 1 2 2 1 1 3 4 3 3 2 2 1 2 1 2 2 4 1 2 1 8 6 3

Part Type =============== 0.01OHM/1W 0.1uF

Designator ==================== R115 R116 R215 R216 C1 C103 C107 C120 C203 C207 C3 C4 0.1uF/100V/PPS C114 C214 0.1uF/250V/EB C105 C106 C205 C206 0.1uF/250V/EF C108 C110 C112 C208 C210 C212 0.22uF/100V/PPS C117 C217 C5 C6 1.15K,1% R107 R207 R210 100uF/16V C8 10K POT R104 11uH L100 L200 13.3K,1% R111 R211 150pF C102 1K R7 1K,1% R105 R205 R208 1N914 D105 D106 D205 D206 20K,1% R100 R101 R201 20OHM/5W R128 R228 R6 220OHM R112 R212 220pF C116 C216 237K,1% R3 261K,1% R4 R5 270pF C202 330uF/100V C109 C209 33pF C101 C201 390uF/50V C111 C113 C211 C213 4.7uF C200 47uF/25V C104 C204 49.9K,1% R200 5.6OHM/1W R114 R120 R125 R126 R214 R220 R225 R226 510K R102 R103 R118 R119 R218 R219 7.5K,1% R106 R206 R209

Page 1

Footprint =========== RLVR1RG2 0805

Part Field 1 =================== OHMITE 20% TOL.

Part Field 2 ============ 12F010 *

Part Field 3 =============== DK 12F010-ND *

C0U22PPS10 C0U1MF10 C0U1MF10

PANASONIC PANASONIC PANASONIC

ECH-S1104JZ ECQ-E2104KB ECQ-E2104KF

DK PS1104J-ND DK P10967-ND EF2104-ND

C0U22PPS10 0805 C10UEL05 POTSTURN T106 0805 0805 0805 0805 1N914L 0805 PWR5WRT RES1W50 0805 0805 0805 0805 C330UEL10 0805 C100UEL06 C10UEL05 C10UEL05 0805 RES1W50

PANASONIC * PANASONIC BOURNS COIL WINDING SPEC * NPO 5% 5% *

ECH-S1224JZ * ECA-1CHG101 3306P-1-103 T106-2 CORE * * * *

* XICON 5%, 1/4W NPO 5% * * NPO 5% PANASONIC NPO 5% PANASONIC PANASONIC PANASONIC * PANASONIC

*

DK PS1224J-ND * DK P5529-ND DK 3306P-103-ND 29TURNS / 16AWG * * * * * * 280-PRM5-20

* * * * EEU-FC2A331S * EEU-FC1H391S ECA-1HHG4R7 ECA-1HHG220 * ERG-1SJ5R6

* * * * DK P10783-ND * DK P10327-ND DK P5566-ND DK P5568-ND * P5.6W-1BK-ND

0805

5% TOL.

*

*

0805

*

*

*

C:\LAYOUTS\TA3020\3020SUB3\BR3020_1.BOM 11:13:42 12-Jul-2001

1 1 1 1 2 1 1 1 2 2 16

715K,1% 8.25K,1% CON2INPT CON2LPWR CON4 CON6 FBEAD HDR2 HDR3 MURS120T3 NS

2 4 1

SCRWTERM STW34NB20 TA3020

R9 R1 J200 J1 J102 J202 J2 L1 J3 J4 J5 D102 D202 D104 D107 M100 M103 R113 R121 R213 R221 J101 J201 M101 M102 I1

D204 M200 R124 R224

D207 M203 R127 R227

M201 M202

0805 0805 CON2 CON2B BUSBAR1 PWRCON6 2512 GJMPR001 GJMP3001 SMB 1N914L

* * WALDOM WALDOM * * SPC/MULTICOMP * * MOTOROLA

* * 705-43-0001 22-23-2021 * * SPC5304 * * MURS120T3

SCRWTERM * * TO3P&220FLT ST MICROELECTRONICS * DIP48 TRIPATH *

* * DK WM4800-ND DK WM4200-ND * * Newark - 50N670 * * * *

* * *

1

2

3

4

5

6

D

D VPP

C211 470uF/63V

VNN

R215 0.01OHM/1W C210 C208 0.1uF/250V/EF 0.1uF/250V/EF

M200 STW34NB20

R115

C8 100uF/16V

D204 1N914

I1 VN10

1

R213

D104 1N914

VN10

LO1

48

2

J202 M201 STW34NB20

3

HO2COM

HO1

HO2

OCS1HN

CON4 FB1

44 R125 C105 0.1uF/250V/EB

5.6OHM/1W 1

6

M202 STW34NB20

7

OCS2LN

OCS1HP

1

43

OCS2LP

OCS1LP

OCS2HP

OCS1LN

D106 1N914

42 C106 0.1uF/250V/EB

R220

R228 20OHM/5W

8

10OHM/1W

PGND2

M203 STW34NB20

5.6OHM/1W D207 1N914

C204 47uF/25V

OCS2HN

VBOOT1

R120

VBOOT2

VNN

220OHM

C103 0.1uF

10

R126

40

39

5.6OHM/1W D107 1N914

VNN

R221 C209 220uF/160V

VNN

C213 470uF/63V

R216 0.01OHM/1W

R128 20OHM/5W PGND1

C104 47uF/25V

D202 MURS120T3

C203 0.1uF

AMPOUT1 C117 0.22uF/100V/PPS

C114 0.1uF/100V/PPS

510OHM/1W D102 MURS120T3

9 220OHM

2

M102 STW34NB20

R112

41

C205 0.1uF/250V/EB

R212

R226 C

L100 11uH

5.6OHM/1W

C206 0.1uF/250V/EB

D206 1N914

J102 M101 STW34NB20

R114

45

510OHM/1W 5

R225

2

5.6OHM/1W D105 1N914

46

R218 510K

10OHM/1W

C214 0.1uF/100V/PPS

HO1COM

47

R118 510K 4

CON4

C217 0.22uF/100V/PPS

LO2COM

C111 470uF/63V

R124

5.6OHM/1W D205 1N914

FB2

AMPOUT2

LO1COM

C110 0.1uF/250V/EF

C108 0.1uF/250V/EF

10OHM/1W

R219 C207 510K 0.1uF

R214

L200 11uH

LO2

R119 510K

VPP

0.01OHM/1W

R113 C107 0.1uF

10OHM/1W

R224

M100 STW34NB20

C M103 STW34NB20

R121

10OHM/1W

V5

R227 5.6OHM/1W R106

11

R105 1K,1%

C212 0.1uF/250V/EF

NC

AGND

FB1

12

OCRNT2 10.5K,1% C102 75pF

NC

10OHM/1W

38

OCR2

OCR1

C109 220uF/160V

R127 5.6OHM/1W

AGND 37

R116 0.01OHM/1W

VNN

OCRNT1 C112 0.1uF/250V/EF

R107 1.10K,1%

FN1

13

FBKOUT1

NC

FBKGND1

V5

C113 470uF/63V

36 AGND

AGND

14

35

V5

BRIDGED OUTPUT C3 0.1uF

15

HMUTE

HMUTE

DGND

V5

R206

C5 AMPOUT2

34 AGND

R205 1K,1%

FN2

16

FBKOUT2

OCR1

33

17 R207 1.10K,1%

R208 1K,1%

R209

DCOMP

REF1

32

R1 8.25K,1%

AGND FP2

PGND2

18

FBKGND2

OCR2

R210 1.10K,1%

AGND

19

BIASCAP

VNNSENSE

AGND C200 4.7uF

R200 49.9K,1%

AGND

J101 SCRWTERM

OCRNT2 R211 12.3K,1%

B

VNN

30

0.1uF

J200

C6

AGND

C216 220pF

C4

R6

20OHM/5W 0.22uF/100V/PPS

R111 12.3K,1%

31

10.5K,1%

B

AMPOUT1 0.22uF/100V/PPS

OCRNT1 C116 220pF

FB2 10.5K,1% C202 180pF

J201 SCRWTERM

R3 316K,1%

AGND

AGND IN2

R201 20K,1%

20

INV2

VPPSENSE

29

VPP

C201 33pF

J5

R9 953K,1%

R5 348K,1% VP2 21

OAOUT2

AGND

C1 AGND 0.1uF

V5

22

SET BBM0 T0 0

BBM0

V5

BBM1

OAOUT1

27

J2

VPP VN10 VNN

28 R4 348K,1%

V5

CON6 V5

J4 23

SET BBM1 T0 0

24

J3 MUTE REMOVE J3 SHUNT TO ENABLE MUTE

MUTE

INV1

5V INPUT CONNECTOR J1 V5

26 C101 33pF

R7 1K

25

R101 20K,1%

IN1

R100

VP2

AGND

20K,1% AGND

TA3020

L1 FBEAD 1

R103

R102

2 510K

510K C120 0.1uF

AGND

A

V5

OFFSET TRIM R104 10K POT

A

AGND

Title

TA3020 BRIDGED REFERENCE BOARD - 2 - 30V TO 48V Size

Number

Revision

3.0

C Date: File: 1

2

3

4

5

12-Jul-2001 Sheet of C:\LAYOUTS\TA3020\3020SUB3\BR3020_2.SCH Drawn By: 6

C:\LAYOUTS\TA3020\3020SUB3\BR3020_2.BOM 11:11:54 12-Jul-2001

Bill of Material for Bridged RB-TA3020-2, Rev 3.0 Used ==== 4 8 2 4 6 4 3 3 1 1 6 2 2 1 1 3 8 3 3 2 2 2 1 2 2 1 4 2 1 8

Part Type =============== 0.01OHM/1W 0.1uF

Designator ==================== R115 R116 R215 R216 C1 C103 C107 C120 C203 C207 C3 C4 0.1uF/100V/PPS C114 C214 0.1uF/250V/EB C105 C106 C205 C206 0.1uF/250V/EF C108 C110 C112 C208 C210 C212 0.22uF/100V/PPS C117 C217 C5 C6 1.10K,1% R107 R207 R210 10.5K,1% R106 R206 R209 100uF/16V C8 10K POT R104 10OHM/1W R113 R121 R213 R214 R220 R221 11uH L100 L200 12.3K,1% R111 R211 180pF C202 1K R7 1K,1% R105 R205 R208 1N914 D104 D105 D106 D107 D204 D205 D206 D207 20K,1% R100 R101 R201 20OHM/5W R128 R228 R6 220OHM R112 R212 220pF C116 C216 220uF/160V C109 C209 316K,1% R3 33pF C101 C201 348K,1% R4 R5 4.7uF C200 470uF/63V C111 C113 C211 C213 47uF/25V C104 C204 49.9K,1% R200 5.6OHM/1W R124 R125 R126 R127 R224 R225 R226 R227

Page 1

Footprint =========== RLVR1RG2 0805

Part Field 1 =================== OHMITE 20% TOL.

Part Field 2 ============ 12F010 *

Part Field 3 =============== DK 12F010-ND *

C0U22PPS10 C0U1MF10 C0U1MF10

PANASONIC PANASONIC PANASONIC

ECH-S1104JZ ECQ-E2104KB ECQ-E2104KF

DK PS1104J-ND DK P10967-ND EF2104-ND

C0U22PPS10 0805 0805 C10UEL05 POTSTURN RES1W50

PANASONIC * * PANASONIC BOURNS PANASONIC

ECH-S1224JZ * * ECA-1CHG101 3306P-1-103 ERG-1SJ5R6

DK PS1224J-ND * * DK P5529-ND DK 3306P-103-ND P5.6W-1BK-ND

T106 0805 0805 0805 0805 1N914L

COIL WINDING SPEC * NPO 5% 5% *

T106-2 CORE * * * *

29TURNS / 16AWG * * * * *

0805 PWR5WRT RES1W50 0805 C330UEL10 0805 0805 0805 C10UEL05 C100UEL06 C10UEL05 0805 RES1W50

* XICON 5%, 1/4W NPO 5% PANASONIC * NPO 5% * PANASONIC PANASONIC PANASONIC * PANASONIC

*

* 280-PRM5-20

* EEU-EB2C221S * * * ECA-1HHG4R7 EEU-FC1J471 ECA-1HHG220 * ERG-1SJ5R6

* DK P5910-ND * * * DK P5566-ND DK P10352-ND DK P5568-ND * P5.6W-1BK-ND

C:\LAYOUTS\TA3020\3020SUB3\BR3020_2.BOM 11:11:54 12-Jul-2001

6

510K

2 1 1 1 1 1 2 1 1 1 2 2 2 8

510OHM/1W 75pF 8.25K,1% 953K,1% CON2INPT CON2LPWR CON4 CON6 FBEAD HDR2 HDR3 MURS120T3 SCRWTERM STW34NB20

1

TA3020

R102 R103 R118 R119 R218 R219 R114 R120 C102 R1 R9 J200 J1 J102 J202 J2 L1 J3 J4 J5 D102 D202 J101 J201 M100 M101 M102 M103 M200 M201 M202 M203 I1

0805

5% TOL.

*

*

RES1W50 0805 0805 0805 CON2 CON2B BUSBAR1 PWRCON6 2512 GJMPR001 GJMP3001 SMB SCRWTERM TO3P&220FLT

PANASONIC NPO 5% * * WALDOM WALDOM * * SPC/MULTICOMP * * MOTOROLA * ST MICROELECTRONICS

ERG-1SJ5R6 * * * 705-43-0001 22-23-2021 * * SPC5304 * * MURS120T3 * *

P5.6W-1BK-ND * * * DK WM4800-ND DK WM4200-ND * * Newark - 50N670 * * * * *

DIP48

TRIPATH

*

*

1

2

3

4

5

6

D

D VPP

C211 470uF/63V

VNN

R215 0.01OHM/1W C210 C208 0.1uF/250V/EF 0.1uF/250V/EF

M200 STW34NB20

R115

C8 100uF/16V

D204 1N914

I1 VN10

1

R213

D104 1N914

VN10

LO1

48

2

J202 M201 STW34NB20

3

HO2COM

HO1

HO2

OCS1HN

CON4 FB1

44 R125 C105 0.1uF/250V/EB

5.6OHM/1W 1

6

M202 STW34NB20

7

OCS2LN

OCS1HP

1

43

OCS2LP

OCS1LP

OCS2HP

OCS1LN

D106 1N914

42 C106 0.1uF/250V/EB

R220

R228 20OHM/5W

8

10OHM/1W

PGND2

M203 STW34NB20

5.6OHM/1W D207 1N914

C204 47uF/25V

OCS2HN

VBOOT1

R120

VBOOT2

VNN

220OHM

C103 0.1uF

10

R126

40

39

5.6OHM/1W D107 1N914

VNN

R221 C209 220uF/160V

VNN

C213 470uF/63V

R216 0.01OHM/1W

R128 20OHM/5W PGND1

C104 47uF/25V

D202 MURS120T3

C203 0.1uF

AMPOUT1 C117 0.22uF/250V

C114 0.1uF/100V/PPS

10OHM/1W D102 MURS120T3

9 220OHM

2

M102 STW34NB20

R112

41

C205 0.1uF/250V/EB

R212

R226 C

L100 11uH

5.6OHM/1W

C206 0.1uF/250V/EB

D206 1N914

J102 M101 STW34NB20

R114

45

10OHM/1W 5

R225

2

5.6OHM/1W D105 1N914

46

R218 510K

10OHM/1W

C214 0.1uF/100V/PPS

HO1COM

47

R118 510K 4

CON4

C217 0.22uF/250V

LO2COM

C111 470uF/63V

R124

5.6OHM/1W D205 1N914

FB2

AMPOUT2

LO1COM

C110 0.1uF/250V/EF

C108 0.1uF/250V/EF

10OHM/1W

R219 C207 510K 0.1uF

R214

L200 11uH

LO2

R119 510K

VPP

0.01OHM/1W

R113 C107 0.1uF

10OHM/1W

R224

M100 STW34NB20

C M103 STW34NB20

R121

10OHM/1W

V5

R227 5.6OHM/1W R106

11

R105 1K,1%

C212 0.1uF/250V/EF

NC

AGND

FB1

12

OCRNT2 15K,1% C102 62pF

NC

10OHM/1W

38

OCR2

OCR1

C109 220uF/160V

R127 5.6OHM/1W

AGND 37

R116 0.01OHM/1W

VNN

OCRNT1 C112 0.1uF/250V/EF

R107 1.07K,1%

FN1

13

FBKOUT1

NC

FBKGND1

V5

C113 470uF/63V

36 AGND

AGND

14

35

V5

BRIDGED OUTPUT C3 0.1uF

15

HMUTE

HMUTE

DGND

V5

R206

C5 AMPOUT2

34 AGND

R205 1K,1%

FN2

16

FBKOUT2

OCR1

33

17 R207 1.07K,1%

R208 1K,1%

R209

DCOMP

REF1

32

R1 8.25K,1%

AGND FP2

PGND2

18

FBKGND2

OCR2

R210 1.07K,1%

AGND

19

BIASCAP

VNNSENSE

OCRNT2

AGND C200 4.7uF

R200 49.9K,1%

AGND

R211 11.3K,1%

B

VNN

30

0.1uF

J200

J101 SCRWTERM

C6

AGND

C216 220pF

C4

R6

20OHM/5W 0.22uF/250V

R111 11.3K,1%

31

15K,1%

B

AMPOUT1 0.22uF/250V

OCRNT1 C116 220pF

FB2 15K,1% C202 150pF

J201 SCRWTERM

R3 422K,1%

AGND

AGND IN2

R201 20K,1%

20

INV2

VPPSENSE

29

VPP

C201 33pF

J5

R9 1.27M,1%

R5 464K,1% VP2 21

OAOUT2

AGND

C1 AGND 0.1uF

V5

22

SET BBM0 T0 0

BBM0

V5

BBM1

OAOUT1

27

J2

VPP VN10 VNN

28 R4 464K,1%

V5

CON6 V5

J4 23

SET BBM1 T0 0

24

J3 MUTE REMOVE J3 SHUNT TO ENABLE MUTE

MUTE

INV1

5V INPUT CONNECTOR J1 V5

26 C101 33pF

R7 1K

25

R101 20K,1%

IN1

R100

VP2

AGND

20K,1% AGND

TA3020

L1 FBEAD 1

R103

R102

2 510K

510K C120 0.1uF

AGND

A

V5

OFFSET TRIM R104 10K POT

A

AGND

Title

TA3020 BRIDGED REFERENCE BOARD - 3 - 40V TO 64V Size

Number

Revision

3.0

C Date: File: 1

2

3

4

5

12-Jul-2001 Sheet of C:\LAYOUTS\TA3020\3020SUB3\BR3020_3.SCH Drawn By: 6

C:\LAYOUTS\TA3020\3020SUB3\BR3020_3.BOM 11:10:31 12-Jul-2001

Bill of Material for Bridged RB-TA3020-3, Rev 3.0 Used ==== 4 8 2 4 6 4 3 1 1 1 8 2 2 1 3 1 3 8 3 3 2 2 2 2 1 1 2 4 2 1 8

Part Type ============== 0.01OHM/1W 0.1uF

Designator ==================== R115 R116 R215 R216 C1 C103 C107 C120 C203 C207 C3 C4 0.1uF/100V/PPS C114 C214 0.1uF/250V/EB C105 C106 C205 C206 0.1uF/250V/EF C108 C110 C112 C208 C210 C212 0.22uF/250V C117 C217 C5 C6 1.07K,1% R107 R207 R210 1.27M,1% R9 100uF/16V C8 10K POT R104 10OHM/1W R113 R114 R120 R121 R213 R214 R220 R221 11.3K,1% R111 R211 11uH L100 L200 150pF C202 15K,1% R106 R206 R209 1K R7 1K,1% R105 R205 R208 1N914 D104 D105 D106 D107 D204 D205 D206 D207 20K,1% R100 R101 R201 20OHM/5W R128 R228 R6 220OHM R112 R212 220pF C116 C216 220uF/160V C109 C209 33pF C101 C201 4.7uF C200 422K,1% R3 464K,1% R4 R5 470uF/63V C111 C113 C211 C213 47uF/25V C104 C204 49.9K,1% R200 5.6OHM/1W R124 R125 R126 R127

Page 1

Footprint =========== RLVR1RG2 0805

Part Field 1 =================== OHMITE 20% TOL.

Part Field 2 ============ 12F010 *

Part Field 3 =============== DK 12F010-ND *

C0U22PPS10 C0U1MF10 C0U1MF10

PANASONIC PANASONIC PANASONIC

ECH-S1104JZ ECQ-E2104KB ECQ-E2104KF

DK PS1104J-ND DK P10967-ND EF2104-ND

C0U22PPS10 0805 0805 C10UEL05 POTSTURN RES1W50

PANASONIC * * PANASONIC BOURNS PANASONIC

ECW-F2224JB * * ECA-1CHG101 3306P-1-103 ERG-1SJ5R6

DK PF2224-ND * * DK P5529-ND DK 3306P-103-ND P10W-1BK-ND

0805 T106 0805 0805 0805 0805 1N914L

* COIL WINDING SPEC NPO 5% * 5% *

* T157-2 CORE * * * *

* 28TURNS / 14AWG * * * * *

0805 PWR5WRT RES1W50 0805 C330UEL10 0805 C10UEL05 0805 0805 C100UEL06 C10UEL05 0805 RES1W50

* XICON 5%, 1/4W NPO 5% PANASONIC NPO 5% PANASONIC * * PANASONIC PANASONIC * PANASONIC

*

* 280-PRM5-20

* EEU-EB2C221S * ECA-1HHG4R7 * * EEU-FC1J471 ECA-1HHG220 * ERG-1SJ5R6

* DK P5910-ND * DK P5566-ND * * DK P10352-ND DK P5568-ND * P5.6W-1BK-ND

C:\LAYOUTS\TA3020\3020SUB3\BR3020_3.BOM 11:10:31 12-Jul-2001

6

510K

1 1 1 1 2 1 1 1 2 2 2 8

62pF 8.25K,1% CON2INPT CON2LPWR CON4 CON6 FBEAD HDR2 HDR3 MURS120T3 SCRWTERM STW34NB20

1

TA3020

R224 R225 R102 R103 R218 R219 C102 R1 J200 J1 J102 J202 J2 L1 J3 J4 J5 D102 D202 J101 J201 M100 M101 M200 M201 I1

R226 R227 R118 R119

M102 M103 M202 M203

0805

5% TOL.

*

*

0805 0805 CON2 CON2B BUSBAR1 PWRCON6 2512 GJMPR001 GJMP3001 SMB SCRWTERM TO3P&220FLT

NPO 5% * WALDOM WALDOM * * SPC/MULTICOMP * * MOTOROLA * ST MICROELECTRONICS

* * 705-43-0001 22-23-2021 * * SPC5304 * * MURS120T3 * *

* * DK WM4800-ND DK WM4200-ND * * Newark - 50N670 * * * * *

DIP48

TRIPATH

*

*

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