bts5235l Infineon Technologies Corporation, bts5235l Datasheet - Page 16

• Manufacturer Part Number: bts5235l
• Description: Smart High-side Power Switch
• Manufacturer: Infineon Technologies Corporation

4.2
The device provides embedded protective functions. Integrated protection functions are
designed to prevent IC destruction under fault conditions described in the data sheet.
Fault conditions are considered as “outside” normal operating range. Protection
functions are neither designed for continuous nor repetitive operation.
4.2.1
The load current
ground. There are three steps of current limitation which are selected automatically
depending on the voltage
the OUT pin is
Figure 10
Current limitation is realized by increasing the resistance of the device which leads to
rapid temperature rise inside. A temperature sensor for each channel causes an
overheated channel to switch off to prevent destruction. After cooling down with thermal
hysteresis, the channel switches on again. Please refer to
Figure 11
In short circuit condition, the load current is initially limited to
the current limitation level is reduced to
by switching off the device (
Data Sheet
Protection Functions
Over Load Protection
25
20
15
10
5
Current Limitation (minimum values)
Shut Down by Over Temperature with Current Limitation
I
IN
L
V
I
I
IS
L
bb
I
OUT
-
V
t
is limited by the device itself in case of over load or short circuit to
OFF(SC)
DS
I
L(LIM)
. Please refer to following figure for details.
5
V
DS
V
IN
I
across the power DMOS. Please note that the voltage at
L(SCr)
= 0 V).
10
I
L(SCr)
16
. The current limitation level is reset to
15
Smart High-Side Power Switch
20
Figure 11
I
L(LIM)
t
t
t
Protection Functions
25
. After thermal restart,
for details.
V
V1.0, 2005-12-19
DS
BTS 5235L
CurrentLimitation.emf
OverLoad .emf
I
L(LIM)