Data Sheet

WPMDH1100xx1S / 173010x42
MagI
3
C Power Module
FDSM – Fixed Step Down Regulator Module
we-online.com Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 1.0
© June 2016 17/24
PROTECTIVE FEATURES
Over temperature protection (OTP)
The junction temperature of the MagI³C Power Module should not be allowed to exceed its maximum ratings. Thermal
protection is implemented by an internal Thermal Shutdown circuit which activates at 150°C (typ.), causing the device to enter
a low power standby state. In this state the MOSFET remains off causing V
OUT
to fall. Thermal protection helps to prevent
catastrophic failures from accidental device overheating. When the junction temperature falls back below 150° (hysteresis is
implemented) V
OUT
rises smoothly and normal operation resumes.
Short circuit protection (SCP)
The short circuit protection is realized via cycle by cycle current monitoring. Recovery from short circuit protection mode occurs
during the switching cycle following the removal of the short circuit condition. When the 173010x42 recovers from a short
circuit condition, the soft-start is not active. Therefore an overshoot at output voltage can be observed (see figure below).
Under short circuit condition the input current is limited to I
IN,short
(typ. 65mA)
Over current protection (OCP)
For protection against load faults, the 173010x42 incorporates cycle-by-cycle current monitoring. During an overcurrent
condition the output current is limited and the output voltage drops. When the overcurrent condition is removed, the output
voltage returns to the nominal voltage.
0
1
2
3
4
5
6
7
0 100 200 300 400 500 600
Output voltage [V]
Time [ms]
173010542 - Output voltage overshoot, VIN = 24V