Smart Highside Power Switch

Figure 5b: Open load: detection in ON-state, open
load occurs in on-state
BTS 410 D2
Figure 6b: Undervoltage restart of charge pump
V on
V ON(CL)
IN
ST
t d(ST OL1)
t d(ST OL2)
V
OUT
off-state
on-state
V bb(over)
off-state
V bb(u rst)
V bb(o rst)
I
L
normal
open
normal
V
bb(under)
V bb(u cp)
t
charge pump starts at V bb(ucp) =5.6 V typ.
V bb
t d(ST OL1) = tbd µs typ., t d(ST OL2) = tbd µs typ
Figure 7a: Overvoltage:
Figure 6a: Undervoltage:
IN
IN
V
bb
V
bb
V
ON(CL) V bb(over)
V bb(o rst)
V
bb(under)
Vbb(u cp)
V
bb(u rst)
V
OUT
VOUT
ST
ST CMOS
t
t
if V bb > V bb(AZ) increase of V ST due to GND resistor voltage.
Semiconductor Group 12