OBTS141 Datasheet, PDF (5/10 Pages) Siemens Semiconductor Group – Smart Lowside Power Switch

Block Diagramm
Terms
I _IN
1 ^IN
HITFET
VIN
RL
2
D
ID
3
S
VDS Vbb
Input circuit (ESD protection)
IN
ESD-ZD_I
Source
ESD zener diodes are not designed
for DC current > 2 mA @ V_IN>10V.
BTS 141
Inductive and overvoltage output clamp
VZ
D
S
HITFET
Short circuit behaviour
V _IN
I _D(SCp)
ID
I _D(Lim)
t 0 tm t 1
t2
t0: Turn on into a short circuit
tm : Measurementpoint for I_D(lim)
t1: Activation of the fast temperature sensor and
regulation of the drain current to a level wher
the junction temperature remains constant.
t2: Thermal shutdown caused by the second
temperature sensor, achieved by an
integrating measurement.
Semiconductor Group
Page 5
13.07.1998