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OBTS949 Datasheet(PDF) 5 Page - Siemens Semiconductor Group

Part # OBTS949
Description  Smart Lowside Power Switch
Download  11 Pages
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Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

OBTS949 Datasheet(HTML) 5 Page - Siemens Semiconductor Group

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14.07.1998
Semiconductor Group
Page 5
BTS 949
Block Diagramm
Terms
Inductive and overvoltage output clamp
HITFET
IN
CC
D
V IN
ID
VDS
1
4
5
IIN
3
S
Vbb
RCC
RL
CC
V
HITFET
V
Z
D
S
Short circuit behaviour
The ground lead impedance of
RCC
should be as low as possible
V IN
ID
I D(SCp)
t 0
tm
t 2
ID(Lim)
t 1
Input circuit (ESD protection)
IN
ESD-ZDI
Source
ESD zener diodes are not designed
for DC current > 2 mA @
VIN>10V.
t0:
Turn on into a short circuit
tm :
Measurementpoint for
ID(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.


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