Timing diagrams
Figure 1a: Vbb turn on:
IN
t d(bb IN)
Vbb
V
OUT
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
BTS 542 D2
Figure 2b: Switching an inductive load
IN
td(ST)
ST
AAAAAAAAAAAAA*AAAAAAA)AAAAAA
V
OUT
ST CMOS
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
t
in case of too early VIN=high the device may not turn on (curve A)
td(bb IN) approx. 150 ms
I
L
IL(OL)
t
*) if the time constant of load is too large, open-load-status may occur
Figure 2a: Switching a lamp,
Figure 3a: Turn on into short circuit,
IN
IN
ST
V
OUT
I
L
ST
V
OUT
td(SC)
I
L
t
t
td(SC) approx. 200ms if Vbb - VOUT > 8.3 V typ.
Semiconductor Group
Page 10
13.Nov.95