IR3310 PROGRAMMABLE CURRENT SENSING HIGH SIDE SWITCH

Data Sheet No.PD60181_A IR3310 PROGRAMMABLE CURRENT SENSING HIGH SIDE SWITCH Product Summary Features • • • • • • • Load current feedback Programma...
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Data Sheet No.PD60181_A

IR3310 PROGRAMMABLE CURRENT SENSING HIGH SIDE SWITCH Product Summary

Features • • • • • • •

Load current feedback Programmable over current shutdown Active clamp E.S.D protection Input referenced to Vcc Over temperatue shutdown Reverse battery protection

Rds(on)

7mΩ max.

Vcc.op.

6 to 28V

Current ratio

10 to 100A

Ishutdown

Description

Active clamp

The IR 3310 is a Fully Protected 4 terminal high side switch. The input signal is referenced to Vcc. When the input voltage Vcc - Vin is higher than the specified Vih threshold, the output power MOSFET is turned-on. When Vcc - Vin is lower than the specified Vil threshold, the output MOSFET is turned-off. A sense current proportional to the current in the power Mosfet is sourced to the Ifb pin. Over-current shutdown occurs when Vifb - Vin > 4 V. The current shutdown threshold is adjusted by selecting the proper RIfb. Either over-current and over-temperature latches off the switch. The device is reset by pulling the input pin high. Other integrated protections ( ESD, reverse battery, active clamp ) make the IR 3310 very rugged and suitable for the automotive environment.

8800 35V

Load Dump Max. 43V Package

5 Lead TO220

Typical Connection

VCC

IN

IR 3310

Ifb

Battery

OUT

10 k

LOAD RIfb on off

System Ground Power Ground

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1

IR3310 Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are referenced to Vcc lead. (TAmbient = 25oC unless otherwise specified).

Symbol

Parameter

Min.

Max.

Vcc - Vin max Vcc-VIfb max Vcc - Vout max. Ids cont. Ids1 cont Ids pulsed ESD 1 ESD 2 Pd TJ max.

Maximum input voltage Maximum Ifb voltage Maximum output voltage Diode max. permanent current (Rth = 60 °C/W) (1) Diode max. permanent current (Rth = 5 °C/W) (1) Diode max. pulsed current (1) Electrostatic discharge ( human body model ) Electrostatic discharge ( machine model ) Power dissipation ( Rth = 60 °C/W ) Max. storage and junction temperature

-16 -0.3 -0.3

50 50 30

Units

— — — — — — -40

2.8 35 100 4 0.5 2 150

Min RIfb Ifb max

Minimum resistor on the Ifb pin Max. Ifb current

0.3 -20

— +20

kΩ mA

Units

V

A

kV W °C

Thermal Characteristics Symbol

Parameter

Typ.

Max.

Rth free air

Thermal resistance - free air

60

Rth junct. to case

Thermal resistance junction to case

0.7

— —

°C/W °C/W

Recommended Operating Conditions These values are given for a quick design. For operation outside these conditions, please consult the application notes.

Symbol

Parameter

Vcc Vcc

Vcc Iout Iout 85°C amb. RIfb Pulse min. Fmax

Continuous input voltage Continuous Ifb pin voltage Supply to power ground voltage Continuous output current ( Rth/amb < 5 °C/W, Tj = 125°C) Continuous output current ( Rth/amb < 60 °C/W, Tj = 125°C) Ifb resistor to program Isd and scale (2 & 3) Minimum turn-on pulse width Maximum operating frequency

Fmax Prot.

Maximum frequency with protections activated

-Vin -VIfb

Min.

Max.

Units

6 0.3 6

28 28 28

V

— — 0.5 1

35 6.5 3.5

— —

— 500 200

A kΩ ms Hz

1) Limited by junction temperature. Pulsed current is also limited by wiring 2) 5000 Ohm or leaving Ifb open will shutdown the part. No current will flow in the load.

2

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IR3310 Protection Characteristics

Tj = 25oC (unless otherwise specified), RIfb = 500 to 5kOhm.

Symbol

Parameter

VIfb -Vin @ Isd

Over-current shutdown threshold

Tsd Treset OV Isdf Isd_1k Min.Pulse WAIT

Over-temp. shutdown threshold Protection reset time Over voltage shutdown (not latched) Fixed over current shutdown Adjustable over current shutdown 1K Minimum pulse width (no WAIT state) WAIT function timer

Rev.Rdson Rds(on) reverse bsattery protection

Min.

Typ.

Max. Units Test Conditions

4 — — 30 100 30 200 0.5

4.5

5.4

165 50 33 120 40 500 1.2

— 300 37 140 50 1200 3.5

mS V A A µs ms

4

6.2

10

mΩ

V °C

see Fig. 7 see Fig. 7 VIfb 100 A Tj > 165 °C

IN 4

reverse battery protection

Ifb

OUT WWW.IRF.COM

IR3310

Lead Assignments

1 - In 2 - Ifb 3 - Vcc (tab) 4 - NC 5 - Out 12345

5 Lead TO220

Vcc-Vin

Vcc-Vin Vcc-Vin max Vcc-Vin1 max Vcc-Vin (op) Vih Vil Vhys

Vcc-Vout Vcc-Vout max

Vcc

Vclamp1 Vclamp2

In IR3310

Iin Iin

max Iin1,2 Iin(on)

VIfb

Ifb

Out

Iout Iout max -Ids cont. -Ids pulsed Iout 85°C Isd Iq

Ifb

Figure 1 - Voltages and currents definitions

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Vcc 90%

Vcc-Vout

DV/dt(on)

5V 10 %

Td on Tr1

Tr2

Figure 2 - Switching time definitions (turn-on)

5

IR3310

Vcc

Vcc-Vin

Vin

90%

Ids

Vcc-Vout

DV/dt(off)

T clamp Vcc

Vds clamp

10 %

Td off Tf

Vout Vcc-Vclamp ( see Design tip to evaluate power dissipation )

Figure 3 - Switching time definitions (turn-off)

Vin

Figure 4 - Active clamp waveforms

clamp

Vcc-Vin 12V 0V

I Load T minpulse

40 us (typ.) Ifb

Iout

T minpulse Wait

0V

Precise measurement

Figure 6 - Minimum pulse & WAIT function

Figure 5 - Current sense precision: Accurate measurement only when the power Mosfet is fully ON

6

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IR3310

Vcc-Vin 12V 0V

Iout

t < T reset

t > T reset

t > T reset

t < T reset

OI shutdown Isd wait

wait

Tj OT shutdown Tjsd

Figure 7 - Protection Timing Diagrams

All curves are typical characteristics. Operation in hatched ares is not recommended. Tj=250C, RIfb=500 Ohm, Vcc=14V (unless otherwise specified).

10

10

8

8

6

6

4

4

2

2

0

0 0

10

20

30

40

50

60

Figure 8 - Icc (mA) vs Vcc-Vin (V)

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70

0

5

10

15

20

25

30

Figure 9- Rdson (mΩ) vs Vcc-Vin (V)

7

IR3310

6

200% 180%

5

160% 140%

4

120% 3

100% 80%

2

60% 40%

Vifb-Vin Vih

1

20%

Vil

0% -50 -25

0

25

50

75 100 125 150

0 -50

Figure 10 -Normalized Rdson (%) vs Tj (oC)

-25

0

25

50

100 125 150

Figure 11 - Vih, Vil & Vifb -Vin (V) vs Tj (oC)

100

18

75

Isd min 3s isd typ Isd max 3s

16 14 Max. specified

12 10 8 6

Typical value

4 2 0 0

20

40

60

80

Figure 12 - Error (+/-A) vs Iload (A)

8

100

10 100

1000

10000

Figure 13 - Isd (A) vs RIfb (Ohm)

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IR3310

100

60

5°C/W 15°C/W

50

35°C/W 1'' foot 60°C/W std fooprint

40 30

10

20 10 0 -50

0

50

100

150

absolute maximal single pulse 10 Hz rth=60°C/W dT=25°C 100Hz rth=60°C/W dT=25°C 1kHz rth=60°C/W dT=25°C

1 0.001

200

Figure 14 - Max. DC current (A) vs Temp. (°C)

0.01

0.1

1

Figure 15 - Max. I (A) vs inductance (mH)

100

1000

T=25°C free air/ std. footprint T=100°C free air/ std. footprint

60°C/W free air 5°C/W

Current path capability should be above those curves

10

100

1

Load characteristic should be underneath those curves 0.1

10 1E-05 0.0001

0.001

0.01

0.1

1

10

100

1000

Figure 16 - I out (A) vs Protection resp. Time (s)

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0.0001

0.001

0.01

0.1

1

10

100

1000

Figure 17 - Rth (oC/W) vs Time (s)

9

IR3310

Case Outline - TO220 (5 lead)

IRGB 01-3042 01

IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. 4/3/2003

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