March 5, 2009 Datasheet No – PD97381

IRS20957S Protected Digital Audio Driver Features • • • • • • •

Product Summary

Floating PWM input enables easy half bridge implementation Programmable bidirectional over-current protection with self-reset function Programmable preset dead-time for improved THD performances High noise immunity ±100V ratings deliver up to 500W in output power 3.3 V/ 5 V logic compatible input Operates up to 800kHz

Typical Applications • • • •

Home theatre systems Mini component stereo systems Powered speaker systems General purpose audio power amplifiers

Topology

Half-Bridge

VOFFSET (max)

+/- 100 V

IO+ & IO- (typical)

1.0 A & 1.2 A

Selectable deadtime

15/25/35/80ns

Ton & toff (typical)

95ns & 80ns

OC protection delay

500ns (max)

Shutdown propagation delay

250ns (max)

Package

Typical Connection Diagram

Note: Please refer to Lead Assignments for correct pin configuration. This diagram shows electrical connections only. www.irf.com

© 2008 International Rectifier

1

IRS20957S Table of Contents

Page

Description

3

Qualification Information

4

Absolute Maximum Ratings

5

Recommended Operating Conditions

6

Electrical Characteristics

7

Functional Block Diagram

9

Input/Output Pin Equivalent Circuit Diagram

10

Lead Definitions

11

Lead Assignments

11

Waveform definitions

12

Application information and additional information

12

Package Details

13

Tape and Reel Details

14

Part Marking Information

15

Ordering Information

16

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2

IRS20957S Description The IRS20957S is a high voltage, high speed MOSFET driver with a floating PWM input designed for Class D audio amplifier applications. Bi-directional current sensing detects over current conditions during positive and negative load currents without any external shunt resistors. A built-in protection control block provides a secure protection sequence against over-current conditions and a programmable reset timer. The internal dead-time generation block enables accurate gate switching and optimum dead-time setting for better audio performance, such as lower THD and lower audio noise floor.

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IRS20957S †

Qualification Information Qualification Level

Moisture Sensitivity Level Machine Model ESD Human Body Model IC Latch-Up Test RoHS Compliant

Industrial†† Comments: This family of ICs has passed JEDEC’s Industrial qualification. IR’s Consumer qualification level is granted by extension of the higher Industrial level. MSL2†††260°C SOIC16N (per IPC/JEDEC J-STD-020) Class B (per JEDEC standard EIA/JESD22-A115) Class 2 (per EIA/JEDEC standard JESD22-A114) Class I , Level A (per JESD78) Yes

† Qualification standards can be found at International Rectifier’s web site http://www.irf.com/ †† Higher qualification ratings may be available should the user have such requirements. Please contact your International Rectifier sales representative for further information. ††† Higher MSL ratings may be available for the specific package types listed here. Please contact your International Rectifier sales representative for further information.

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IRS20957S Absolute Maximum Ratings Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to VSS; all currents are defined positive into any lead. The Thermal Resistance and Power Dissipation ratings are measured under board mounted and still air conditions. Symbol VB VS VHO VCSH VCC VLO VDD VSS VIN VCSD VDT VOCSET VREF IDDZ ICCZ IBSZ IOREF d VS /dt d VSS /dt d VSS /dt Pd RthJA TJ TS TL † †† †††

Definition High side floating supply voltage High side floating supply voltage High side floating output voltage CSH pin input voltage Low side fixed supply voltage Low side output voltage Floating input supply voltage Floating input supply voltage PWM input voltage CSD pin input voltage DT pin input voltage OCSET pin input voltage VREF pin voltage

†

†

†

Floating input supply zener clamp current † Low side supply zener clamp current † Floating supply zener clamp current Reference output current Allowable VS voltage slew rate Allowable VSS voltage slew rate

†

††

Allowable VSS voltage slew rate upon power-up Maximum power dissipation Thermal resistance, Junction to ambient Junction Temperature Storage Temperature Lead temperature (Soldering, 10 seconds)

†††

Min. -0.3 VB-15 Vs-0.3 Vs-0.3 -0.3 -0.3 -0.3 (See IDDZ) VSS -0.3 VSS -0.3 -0.3 -0.3 -0.3 -

Max. 215 VB+0.3 VB+0.3 VB+0.3 20 VCC +0.3 210 VDD+0.3 VDD+0.3 VDD+0.3 VCC +0.3 VCC +0.3 VCC +0.3 10 10 10 5 50 50

Units

-

50

V/ms

-55 -

1.0 115 150 150 300

W

V

mA

V/ns

°C/W °C

VDD - VSS, VCC -COM and VB - VS contain internal shunt zener diodes. Please note that the voltage ratings of these can be limited by the clamping current. For the rising and falling edges of step signal of 10V. Vss=15V to 200V. Vss ramps up from 0V to 200V.

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IRS20957S Recommended Operating Conditions For proper operation, the device should be used within the recommended conditions below. The Vs and COM offset ratings are tested with supplies biased at IDD=5mA, VCC=12V and VB-VS=12V. Symbol VB VS IDDZ VSS VHO VCC VLO VIN VCSD VDT IOREF VOCSET TA † ††

Definition High side floating supply absolute voltage High side floating supply offset voltage Floating input supply zener clamp current Floating input supply absolute voltage High side floating output voltage Low side fixed supply voltage Low side output voltage PWM input voltage CSD pin input voltage DT pin input voltage Reference output current to COM OCSET pin input voltage Ambient Temperature

†

Min. Vs+10 † 1 0 Vs 10 0 VSS VSS 0 0.3 0.5 -40

Max. Vs+14 200 5 100 VB 15 VCC VDD VDD VCC 0.8 5 125

Units V mA

V

mA V °C

Logic operational for Vs equal to –5V to +200V. Logic state held for Vs equal to –5V to –VBS. Nominal voltage for VREF is 5V. IOREF of 0.3 – 0.8mA dictates total external resistor value on VREF to be 6.3k to 16.7k Ω.

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IRS20957S Electrical Characteristics VCC,VBS= 12 V, IDD=5mA, VSS=20V, VS=0V,CL=1nF and TA=25°C unless otherwise specified. Symbol Description Low Side Supply VCC supply UVLO positive UVCC+ threshold VCC supply UVLO negative UVCCthreshold IQCC Low side quiescent current Low side zener diode clamp VCLAMPL voltage High Side Floating Supply High side well UVLO positive UVBS+ threshold High side well UVLO negative UVBSthreshold IQBS High side quiescent current High to Low side leakage ILKH current High side zener diode clamp VCLAMPH voltage Floating Input Supply VDD, VSS floating supply UVDD+ UVLO positive threshold VDD, VSS floating supply UVDDUVLO negative threshold Floating Input quiescent IQDD current Floating Input zener diode VCLAMPM clamp voltage Floating input side to Low side ILKM leakage current Floating PWM Input Logic high input threshold VIH voltage Logic low input threshold VIL voltage IIN+ Logic “1” input bias current IINLogic “0” input bias current Protection VREF Reference output voltage Low side OC threshold in Vs VthOCL VthOCH Vth1 Vth2 ICSD+ ICSD-

High side OC threshold in VCSH CSD pin shutdown release threshold CSD pin self reset threshold CSD pin discharge current CSD pin charge current

Min

Typ

Max

Units

Test Conditions

8.4

8.9

9.4

8.2

8.7

9.2

-

-

3

mA

VDT = VCC

19.6

20.4

21.6

V

ICC=5mA

8.0

8.5

9.0

7.8

8.3

8.8

-

-

1

mA

-

-

50

µA

VB=VS =200V

14.7

15.3

16.2

V

IBS=5mA

8.2

8.7

9.2

V

V

V

VSS =0V VSS =0V

7.7

8.2

8.7

-

-

1

mA

VDD=9.5V +Vss

9.8

10.2

10.8

V

IDD=5mA

-

-

50

µA

VDD=VSS =200V

2.3

1.9

-

-

1.9

1.5

-

-

40 1

4.8

5.1

5.4

1.1

1.2

1.3

1.1+ Vs

1.2+ Vs

1.3+ Vs

V µA

V

VIN =3.3V VIN = VSS IOREF =0.5mA OCSET=1.2V, Figure 3 Vs=200V, Figure 4

0.62xVDD

0.70xVDD

0.78xVDD

VSS =0V

0.26xVDD

0.30xVDD

0.34xVDD

VSS =0V VSD = VSS +5V VSD = VSS +5V

70 70

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100 100

130 130

µA

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IRS20957S Protection (continued) Symbol Description Shutdown propagation delay tSD from VCSD > VSS + VthOCH to Shutdown Propagation delay time from tOCH VCSH > VthOCH to Shutdown Propagation delay time from tOCL Vs> VthOCL to Shutdown Gate Driver Output high short circuit Io+ current (Source) Output low short circuit Iocurrent (Sink) Low level out put voltage VOL LO – COM, HO – VS High level out put voltage VOH VCC – LO, VB – HO tr Turn-on rise time tf Turn-off fall time High and low side turn-on Ton_1 propagation delay, floating inputs High and low side turn-off Toff_1 propagation delay, floating inputs High and low side turn-on Ton_2 propagation delay, nonfloating inputs High and low side turn-off Toff_2 propagation delay, nonfloating inputs Deadtime: LO turn-off to HO DT1 turn-on (DTLO-HO) & HO turnoff to LO turn-on (DTHO-LO) Deadtime: LO turn-off to HO DT2 turn-on (DTLO-HO) & HO turnoff to LO turn-on (DTHO-LO) Deadtime: LO turn-off to HO DT3 turn-on (DTLO-HO) & HO turnoff to LO turn-on (DTHO-LO) Deadtime: LO turn-off to HO turn-on (DTLO-HO) & HO turnDT4 off to LO turn-on (DTHOLO)VDT= VDT4 VDT1 DT mode select threshold 1 VDT2 DT mode select threshold 2 VDT3 DT mode select threshold 3

Min

Typ

Max

-

-

250

-

-

500

-

-

500

-

1.0

-

-

1.2

-

-

-

0.1

Units

Test Conditions Figure 2

ns

Figure 4 Figure 3

A

Vo=0V, PWVDT> VDT2, VSS = COM

20

35

50

VDT2>VDT> VDT3, VSS = COM

50

80

110

VDT3>VDT, VSS = COM

0.51xVcc 0.57xVcc 0.32xVcc 0.36xVcc 0.21xVcc 0.23xVcc

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0.63xVcc 0.40xVcc 0.25xVcc

Io=0A

ns

VDT = VCC, VS = 100V, VSS = 100V VDT = VCC, VS = 100V, VSS = 100V VDT = VCC, VS = 100V, VSS = COM VDT = VCC, VS = 100V, VSS = COM

V

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IRS20957S Functional Block Diagram FLOATING INPUT

UV DETECT

VDD

VB UV

HIGH SIDE CS

INPUT LOGIC

Q

HO 15.3V

IN

CSH

UV DETECT

10.2V HV LEVEL SHIFT

VSS

HV LEVEL SHIFT

FLOATING HIGH SIDE

VS

HV LEVEL SHIFT

5V REG

VCC UV DETECT

CHARGE/ DISCHARGE

CSD

SD

DT

20.4V

DEAD-TIME

HV LEVEL SHIFT PROTECTION CONTROL

LO

COM

HV LEVEL SHIFT

LOW SIDE CS

5.1V REFERENCE

OCSET

VREF DT

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IRS20957S I/O Pin Equivalent Circuit Diagrams

VB ESD Diode

HO

15 V Clamp

ESD Diode

VS 200 V

V CC VCC ESD Diode 20 V Clamp

LO ESD Diode

COM

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IRS20957S Lead Definitions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Symbol VDD CSD IN VSS NC VREF OCSET DT COM LO VCC NC VS HO VB CSH

Description Floating input positive supply Shutdown timing capacitor, referenced to VSS PWM non-inverting input, in phase with HO Floating input supply return 5V reference output for setting OCSET Low side over current threshold setting, referenced to COM Input for programmable dead-time, referenced to COM Low side supply return Low side output Low side logic supply High side floating supply return High side output High side floating supply High side over current sensing input, referenced to VS

Lead Assignments

1

16

CSH

CSD

2

15

VB

IN

3

14

HO

VSS

4

13

VS

NC

5

12

NC

VREF

6

11

VCC

OCSET

7

10

LO

8

9

COM

DT

IRS20957

VDD

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IRS20957S Waveform definitions

Vth1 CSD

90% HO/LO

tSD

Figure 1: Switching Time Waveform Definitions

VS

Figure 2: CSD to Shutdown Waveform Definitions

VthOCH

CSH

VthOCL

VS

90%

90%

LO

HO

tOCL

tOCH

Figure 3: VS > VthOCL to Shutdown Waveform

Figure 4: VCSH > VthOCH to Shutdown Waveform

Application information and additional information Please refer to AN-1144 for IRS20957 functional description.

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IRS20957S Package Details: SOIC16N

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IRS20957S Package Details: SOIC16N, Tape and Reel LOADED TAPE FEED DIRECTION

A

B

H

D F

C

NOTE : CONTROLLING DIM ENSION IN M M

E G

CARRIER TAPE DIMENSION FOR Metric Code Min Max A 7.90 8.10 B 3.90 4.10 C 15.70 16.30 D 7.40 7.60 E 6.40 6.60 F 10.20 10.40 G 1.50 n/a H 1.50 1.60

16SOICN Imperial Min Max 0.311 0.318 0.153 0.161 0.618 0.641 0.291 0.299 0.252 0.260 0.402 0.409 0.059 n/a 0.059 0.062

F

D C

B A

E

G

H

REEL DIMENSIONS FOR 16SOICN Metric Imperial Code Min Max Min Max A 329.60 330.25 12.976 13.001 B 20.95 21.45 0.824 0.844 C 12.80 13.20 0.503 0.519 D 1.95 2.45 0.767 0.096 E 98.00 102.00 3.858 4.015 F n/a 22.40 n/a 0.881 G 18.50 21.10 0.728 0.830 H 16.40 18.40 0.645 0.724

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IRS20957S Part Marking Information

Part number

IRSxxxxx

Date code

YWW ?

IR logo

Pin 1 Identifier ?

MARKING CODE

P

Lead Free Released

? XXXX

Lot Code (Prod mode – 4 digit SPN code) Assembly site code Per SCOP 200-002

Non-Lead Free Released

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IRS20957S Ordering Information

Standard Pack Base Part Number

IRS20957S

Package Type

Complete Part Number

SOIC16N

Form

Quantity

Tube/Bulk

45

IRS20957SPBF

Tape and Reel

2500

IRS20957STRPBF

The information provided in this document is believed to be accurate and reliable. However, International Rectifier assumes no responsibility for the consequences of the use of this information. International Rectifier assumes no responsibility for any infringement of patents or of other rights of third parties which may result from the use of this information. No license is granted by implication or otherwise under any patent or patent rights of International Rectifier. The specifications mentioned in this document are subject to change without notice. This document supersedes and replaces all information previously supplied.

For technical support, please contact IR’s Technical Assistance Center http://www.irf.com/technical-info/ WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105

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