BTS 640 S2
Figure 6b: Undervoltage restart of charge pump
Figure 5b: Open load: detection in ON- and OFF-state
V
(with R
), turn on/off to open load
ON(CL)
EXT
V
on
IN
t
d(ST OL3)
ST
V
V
bb(over)
OUT
V
V
bb(o rst)
bb(u rst)
V
bb(u cp)
I
L
V
open load
bb(under)
V
bb
I
IS
charge pump starts at Vbb(ucp) =4.7 V typ.
t
Figure 7a: Overvoltage:
Figure 6a: Undervoltage:
IN
IN
ST
not defined
ST
V
V
V
ON(CL)
V
bb
bb(over)
bb(o rst)
V
bb
V
bb(u cp)
V
bb(under)
V
I
bb(u rst)
L
I
L
I
IS
I
t
IS
t
Semiconductor Group
Page 13
2003-Oct-01