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Features

Load current feedback

Programmable over current shutdown

Active clamp

E.S.D protection

Input referenced to Vcc

Over temperatue shutdown

Reverse battery protection

IR3311(S)

Data Sheet No.PD60210_C

Description

The IR 3311(S) 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 > 4.5 V. The current shutdown threshold is adjusted
by selecting the proper RIfb. Either over-current and over-tem-
perature latches off the switch. The device is reset by pulling
the input pin high. Other integrated protections ( ESD, reverse
battery, active clamp ) make the IR3311(S) very rugged and
suitable for the automotive environment.

Typical Connection

PROGRAMMABLE CURRENT SENSING HIGH SIDE SWITCH

Product Summary

ds(on)

12m

cc.op.

6 to 28V

Current ratio

5300

shutdown

6A to 58A

Active clamp

35V

Load Dump

40V

Package

www.irf.com

VCC

OUT

IR 3311

LOAD

Battery

Power
Ground

System
Ground

off

Ifb

10 k

RIfb

5 Lead TO220

IR3311

5 Lead

Pak (SMD220)

IR3311S

IR3311(S)

WWW.IRF.COM

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 = 25

C unless otherwise specified).

1) Limited by junction temperature. Pulsed current is also limited by wiring
2) <500 Ohm or shorting Ifb to gnd may damage the part with Isd around 90A
3) >5000 Ohm or leaving Ifb open will shutdown the part. No current will flow in the load.

Symbol

Parameter

Min.

Max.

Units

Vcc - Vin max

Maximum input voltage

-16

Vcc-VIfb max

Maximum Ifb voltage

-0.3

Vcc - Vout max.

Maximum output voltage

-0.3

Ids cont.

Diode max. permanent current (Rth = 60 °C/W) (1)

2.8

Ids1 cont

Diode max. permanent current (Rth = 5 °C/W) (1)

Ids pulsed

Diode max. pulsed current (1)

100

ESD 1

Electrostatic discharge (human body model) C=100pF, R=1500

ESD 2

Electrostatic discharge (machine model)C=200pF, R=0

L=10

0.5

Power dissipation ( Rth = 60 °C/W )

TJ max.

Max. storage and junction temperature

-40

150

°C

Min RIfb

Minimum resistor on the Ifb pin

0.3

Ifb max

Max. Ifb current

-20

+20

Recommended Operating Conditions

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

Symbol

Parameter

Min.

Max.

Units

Vcc -Vin

Continuous input voltage

Vcc -VIfb

Continuous Ifb pin voltage

0.3

Vcc

Supply to power ground voltage

Iout

Continuous output

current ( Rth/amb < 5 °C/W, Tj = 125°C)

Iout 85°C amb.

Continuous output

current ( Rth/amb < 60 °C/W, Tj = 125°C)

-- 5

RIfb

Ifb resistor to program Isd and scale (2 & 3)

0.5 3.5

Pulse min.

Minimum turn-on pulse width

Fmax

Maximum operating frequency

-- 500

Fmax Prot.

Maximum frequency with protections activated

-- 200

Thermal Characteristics

Symbol

Parameter

Typ.

Max.

Units

Rth 1

Thermal resistance junction to Ambient - TO220

Rth 2

Thermal resistance junction to case - TO220

0.7

Rth 1

Thermal resistance with standard footprint - SMD220

Rth 2

Thermal resistance with 1" square footprint - SMD220

Rth 3

Thermal resistance junction to case - SMD220

0.7

°C/W

IR3311(S)

WWW.IRF.COM

Symbol Parameter

Min. Typ. Max. Units Test Conditions

Tdon

Turn-on delay time to Vcc-Vout= 0.9 Vcc

Tr1

Rise time to Vcc-Vout=5V

0.4

1.6

Tr2

Rise time to Vcc -Vout = 0.1Vcc

100

Eon

Turn ON energy

1.5

Tdoff

Turn-off delay to Vcc -Vout = 0.1Vcc

Fall time to Vcc-Vout = 0.9 Vcc

Eoff

Turn OFF energy

see figure 2

see figure 3

Switching Electrical Characteristics

Vcc = 14V, Resistive Load = 0.4

, T

= 25

C, (unless otherwise specified).

4) Input thresholds are measured directly between the input pin and the tab. Any parasitic resistance in common between the load

current path and the input signal path can significantly affect the thresholds.

5) Rds(on) is measured between the Tab and the Out pin, 5mm away from the package.

Protection Characteristics

Tj = 25

C (unless otherwise specified), RIfb = 500 to 5kOhm.

Symbol

Parameter

Min.

Typ.

Max. Units Test Conditions

VIfb -Vin

@ Isd

Over-current shutdown threshold

4.5

5.4

Tsd

Over-temp. shutdown threshold

165

°C

see Fig. 7

Treset

Protection reset time

300

see Fig. 7

Over voltage shutdown (not latched)

Isdf

Fixed over current shutdown

VIfb<Vin

Isd_1k

Adjustable over current shutdown 1K

RIfb=1k

Min.Pulse

Minimum pulse width (no WAIT state)

200

500

1200

see Fig. 6

WAIT

WAIT function timer

0.5

1.2

3.5

see Figs. 6 and 7

Rev.Rdson Rds(on) reverse battery protection

Vcc-Vin=-12V, Iload=10A

Symbol

Parameter

Min.

Typ.

Max. Units Test Conditions

Total quiescent current (Iout +Ifb)

Vcc-Vin=0, Vcc-

Vcc-VIfb=12V

Iin

Input current

1.5

Vcc-Vin=14V

Vih

High level input threshold voltage (4)

5.5

Vil

Low level input threshold voltage (4)

3.5

Vhys

Input hysterisis = Vih-Vil

0.4

1.5

Iout qs

Output quiescent current

Vcc-Vin=0; Vcc-VIfb=0;

Vcc-Vout=12V

Rds1 on

ON state resistance (5)

Iout=30A, Vcc-Vin=14V

Rds2 on

ON state resistance (5)

9.5

Iout=17A, Vcc -Vin=6V

Rds3 on

ON state resistance (5)

Iout=30A, Tj = 150

Vclamp1

Vcc to Vout active clamp voltage

Iout = 10mA

Vclamp2

Vcc to Vout active clamp voltage

Iout=30A,Vcc-VIfb<20V

Vsd

Body diode forward voltage

0.85

Iout=5A

Vaval.

Vcc to Vout avalanche voltage

Iout=100mA,Vcc-Vfb>

Static Electrical Characteristics

(Tj = 25

C, Vcc = 14V unless otherwise specified.)

Vout=12V

35V

IR3311(S)

WWW.IRF.COM

Functional Block Diagram

Symbol Parameter

Min.

Typ.

Max. Units Test Conditions

Ratio

I load / IIfb current ratio

4,500

5,300

6,300

= 25

C ,Rfb = 500

I = 50A

Ratio_TC Iload/Ifb variation over temperature

-5

= -40 T

+150

offset

Load current diagnostic offset

-0.9

0.9

I = 2A

Trst

Ifb response time (low signal)

90% of the I load step

Current Sense Characteristics

4mA

70V

active clamp
disconnection

charge
pump

fast turn-off

driver

reverse
battery
protection

Tj > 165 °C

I out > 60 A

Ifb

OUT

VCC

On/Off

Set

Reset

latch

timer

1.5 ms

timer

300 us

Wait

33V

Min. pulse

70V

33V

43V

36V

IR3311(S)

WWW.IRF.COM

Vcc

10 %

Td on

Tr1

Vcc-Vout

Vcc-Vin

90%

Tr2

DV/dt(on)

Figure 1 - Voltages and currents definitions

Figure 2 - Switching time definitions (turn-on)

IR3311

Vcc-Vin
Vcc-Vin

max

Vcc-Vin1

max

Vcc-Vin (op)
Vih
Vil
Vhys

Iin
Iin

max

Iin1,2
Iin(on)

Vcc-Vout
Vcc-Vout

max

Vclamp1
Vclamp2

Iout
Iout

max

-Ids

cont.

-Ids

pulsed

Iout

85°C

Isd
Iq

Vcc

Out

Ifb

VIfb

Ifb

Lead Assignments

Part Number

1 2 3 4 5

5 Lead - TO220

IR3311

3 (Vcc)

5 Lead - D

PAK (SMD220)

IR3311S

3 (Vcc)

1 2 3 4 5

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

Part Number IR3311