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BTS 724G

Smart High-Side Power Switch

Four Channels: 4 x 90mΩ

Status Feedback

Product Summary Package

Operating Voltage V

bb

40V

P-DSO-20

Active channels one four parallel

On-state Resistance R

ON

90mΩ 22.5mΩ

Nominal load current I

L(NOM)

3.3A 7.3A

Current limitation I

L(SCr)

12A 12A

General Description

•

•

N channel vertical power MOSFET with charge pump, ground referenced CMOS compatible input and



diagnostic feedback, monolithically integrated in Smart SIPMOS

technology.

Providing embedded protective functions

Applications

•

•

•

•

µC compatible high-side power switch with diagnostic feedback for 12V and 24V grounded loads

All types of resistive, inductive and capacitve loads

Most suitable for loads with high inrush currents, so as lamps

Replaces electromechanical relays, fuses and discrete circuits

Basic Functions

•

•

•

•

•

•

•

Very low standby current

CMOS compatible input

Improved electromagnetic compatibility (EMC)

Fast demagnetization of inductive loads

Stable behaviour at undervoltage

Wide operating voltage range

Logic ground independent from load ground

Protection Functions Block Diagram

• Short circuit protection

• Overload protection

• Current limitation

• Thermal shutdown

• Overvoltage protection (including load dump) with external

resistor

• Reverse battery protection with external resistor

• Loss of ground and loss of V

bb

protection

• Electrostatic discharge protection (ESD)

Vbb

IN1

ST1/2

IN2

Logic

Channel 1

Channel 2Load 1

Load 2

Diagnostic Function

•

•

•

Diagnostic feedback with open drain output

Open load detection in OFF-state

Feedback of thermal shutdown in ON-state

IN3

ST3/4

IN4

Logic

Channel 3

Channel 4

Load 3

GND

Load 4

Infineon Technologies AG 1 of 14 2003-Oct-01

BTS 724G

Functional diagram

overvoltage

protection

internal

voltage supply

IN1

logic

gate

control

+

charge

pump

current limit

VBB

clamp for

inductive load

OUT1

ESD

temperature

sensor

Open load

detection

reverse

battery

protection

LOAD

.

ST1/2

channel 1

IN2

GND1/2

control and protection circuit

of

channel 2

OUT2

IN3

control and protection circuit

of

channel 3

OUT3

ST3/4

IN4

GND3/4

control and protection circuit

of

channel 4

OUT4

Infineon Technologies AG 2 of 14 2003-Oct-01