paulmdrdo
Full Member level 3
Good day everyone! I have built the circuit attached herein on a PCB. The driver section and the half-bridge circuit were tested individually and worked fine. But when I try to combine them the IR2110 always blows up. And the output of the 12v supply that I used to power the vcc pin of the IR2110 gets messed up as well. I used 80v ac coming from a variac. How do I fix this problem? Note: the SD pin 11 of the IR2110 is tied to ground during the testing and the frequency coming from the VCO is 80khz. The circuit is from this website http://www.imajeenyus.com/electronics/20110514_power_ultrasonic_driver/index.shtml with a demo of a working unit. I really need your help with this one. Thank you!
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