BTS840S2 데이터 시트보기 (PDF) - Infineon Technologies

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BTS840S2

Smart High-Side Power Switch Two Channels: 2 x 30 mΩ Current Sense

Infineon Technologies 

BTS 840 S2

Timing diagrams

Both channels are symmetric and consequently the diagrams are valid for channel 1 and

channel 2

Figure 1a: Switching a resistive load,

change of load current in on-condition:

IN

Figure 2a: Switching a resistive load,

turn-on/off time and slew rate definition:

IN

ST

t don(ST)

VOUT

t on

IL

tslc(IS)

t doff(ST)

t off

t slc(IS)

VOUT

90%

t on

dV/dton

10%

Load 1

Load 2

IIS

tson(IS)

t

t soff(IS)

The sense signal is not valid during settling time after turn or

change of load current.

Figure 1b: Vbb turn on:

IN1

IL

Figure 2b: Switching a lamp:

IN

IN2

ST

V bb

V

OUT1

V

OUT2

ST1 open drain

V

OUT

I

L

dV/dtoff

toff

t

ST2 open drain

proper turn on under all conditions

Infineon technologies

t

t

The initial peak current should be limited by the lamp and not by

the current limit of the device.

11

2003-Oct-01

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