Data Sheet

2

Rev. 1.3, 2010-03-16

Smart High-Side Power Switch

BTS721L1

Smart Four Channel Highside Power Switch

Features

• Overload protection

• Current limitation

• Short-circuit protection

• Thermal shutdown

• Overvoltage protection

(including load dump)

• Fast demagnetization of inductive loads

• Undervoltage and overvoltage shutdown

with auto-restart and hysteresis

• Open drain diagnostic output

• Open load detection in ON-state

• CMOS compatible input

• Loss of ground and loss of V

• Electrostatic discharge (ESD) protection

Application

• µC compatible power switch with diagnostic feedback

for 12 V and 24 V DC grounded loads

• All types of resistive, inductive and capacitive loads

• Replaces electromechanical relays and discrete circuits

General Description

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

feedback, monolithically integrated in Smart SIPMOS

technology. Providing embedded protective functions.

Pin Definitions and Functions

Pin

Symbol

Function

1,10,

11,12,

15,16,

19,20

Positive power supply voltage. Design the

wiring for the simultaneous max. short circuit

currents from channel 1 to 4 and also for low

thermal resistance

3

IN1

Input 1 .. 4, activates channel 1 .. 4 in case of

5

IN2

logic high signal

7

IN3

9

IN4

18

OUT1

Output 1 .. 4, protected high-side power output

17

OUT2

of channel 1 .. 4. Design the wiring for the

14

OUT3

max. short circuit current

13

OUT4

4

ST1/2

Diagnostic feedback 1/2 of channel 1 and

channel 2, open drain, low on failure

8

ST3/4

Diagnostic feedback 3/4 of channel 3 and

channel 4, open drain, low on failure

2

GND1/2

Ground 1/2 of chip 1 (channel 1 and channel 2)

6

GND3/4

Ground 3/4 of chip 2 (channel 3 and channel 4)

1

)

connection, reverse load current limited by connected load.

Product Summary

Overvoltage Protection

43

V

Operating voltage

5.0 ... 34

V

active channels:

one

two parallel four parallel

100

50

25

m

Ω

Nominal load current

2.9

4.3

6.3

A

Current limitation

8

8

8

A

GND1/2

2

IN1

3

18 OUT1

ST1/2

4

17 OUT2

IN2

5

GND3/4

6

IN3

7

14 OUT3

ST3/4

8

13 OUT4

IN4

9

P-DSO-20

PG-DSO20