Hi: I have design a PCB for the LM96570 and LM96550 for PZT (Piezoelectric) driver. I have already make that board work which the eight channels of LM96550 can output 50v square pulses and everything seems works find with delay and frequency. the first picture is the one channel of output signal from the LM96550 before I connected to PZT. However, after I connected the output to one PZT-5H about 5s, the chip LM96550 started to burnt with fire suddenly. I am not sure what cause this burnt problem. The Picture to is my PCB schematic and Layout. Could you please give me some help about this problem?
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