Hi Support team
my customer would like to adopt LM76005RNPR in our power supply.
The input voltage of this IC is +48Vdc and the output voltage is +12V/3.5A (for our fan circuit).
some questions about the IC behavior when do a single fault as below items. (see below circuit)
- What is the IC behavior when we do the short circuit across the RFBB?
- What is the IC behavior when we do the open circuit across the RFBT?
- What is the IC behavior when we do the short circuit across the PVIN and SW pin, it seems like we short the High Side MOSFET inside the IC?
- What is the IC behavior when the voltage at FB pin is over 115%? Will it turn off the High Side MOSFET and Turn ON the Low Side MOSFET at the same time?
For item 1 and 2, Does it require an external OVP circuit to pull down the EN pin of the LM76005RNPR when the OVP occurs?
Please advise.