Other Parts Discussed in Thread: CSD18537NQ5A, CSD18504Q5A
Hi,
I did a webench Design for a LM3150 21-30Volt input and 19V output.
After assembly and turning on the current limit of the Power supply who feed the circuit was maxed out i limited to 0.1A ramped up to 3A just to check. No output on the LM3150 circuit..
So i removed the FET's and checked the VCC and HG/LG for signal. And VCC was 6volt HG was switching at around 100mv and LG was switching around 5volt. I checked the Schematic and PCB no error found so far.
Use M1 Fet -> CSD18504Q5A and M2 Fet -> CSD18537NQ5A
Seems something happend to HG ?
Check the FET with multimeter diode test Unlimited and 0.5v on the other side, on both FET so seems okay.
Can you help me to understand what could be wrong ? WBDesign19.pdf
many thanks