BTS712N1 데이터 시트보기 (PDF) - Siemens AG

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BTS712N1

Smart Four Channel Highside Power Switch

Siemens AG 

BTS 712 N1

Timing diagrams

Timing diagrams are shown for chip 1 (channel 1/2). For chip 2 (channel 3/4) the diagrams

are valid too. The channels 1 and 2, respectively 3 and 4, are symmetric and consequently

the diagrams are valid for each channel as well as for permuted channels

Figure 1a: Vbb turn on:

IN1

Figure 2b: Switching an inductive load,

IN2

IN

V bb

ST

V

OUT1

V

OUT

V

OUT2

I

L

ST open drain

t

t

Figure 2a: Switching a lamp:

IN

Figure 3a: Turn on into short circuit:

shut down by overtemperature, restart by cooling

IN1 other channel: normal operation

ST

V

OUT

I

L1

I L(SCp)

I L(SCr)

I

L

t off(SC)

ST

t

t

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

the initial short circuit current IL(SCp) = 7.5 A typ. of the device.

Heating up of the chip may require several milliseconds, depending

on external conditions (toff(SC) vs. Tj,start see page 10)

Semiconductor Group

11

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