Hello guys,
I have the LM5060 device in use in several projects and want to use the over current protection, too.
Due to an error on one of our PCBs the power path was shorted, but also the MOSFET, a SQM120N04 with 120A,
was defect, too, despite the over current protection was 30A (Rsen = 3kOhms) and the time was 200mA (Ct = 1µF).
Then I researched this phenomenon and I found, that even the current protection is about 1A, a hard short causes a
periodic reactivation of the FET(driver). Only if I connect a 10Ohm resistor at 26V (appx. 2,6A) the protection latches
till supply toggle or similar. How could this be? And moreover, how can I get a working overcurrent protection or how
I have to configure the parameters Rsen/Ct? Hope someone could help me :-)
Kind regards,
Philipp PFaffeneder