AUIR3330STRL View Datasheet(PDF) - International Rectifier
Part Name
Description
MFG CO.
'AUIR3330STRL' PDF : 30 Pages View PDF
AUIR3330S
Open load detection function:
The bootstrap regulator bias provides a current on device
output. If the impedance between the Output and ground is
too high, after the turn off of the output mosfet, the output
never reaches the ground. So it becomes possible to detect
easily an open load condition when the device switches. In
fully on condition the open load condition will detect by the
current feedback (easy thanks to a high current condition).
+Bat
Vcc
In
CBBoooott
8mA
6V
6V
IfIbfbk
Gnd
In the schematic below the component R7, Q1, R8, D2
create the detection open load and provide a logic level
diagnostic (open diag line) even if the battery in low voltage
condition.
C2
100nF
Out
D1
MBR
3045CT
Vbat
+ Mot
- Mot
Reverse
battery
protection
Gnd
18 www.irf.com © 2012 International Rectifier
May 29, 2014
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