Problem with TC7920
I'm using the TC7920 (Two Pair, N- and P-Channel Enhancement-Mode MOSFET with Drain-Diodes) to drive a ultrasound emitter (Murata MA40S4S, a piezo-electric transducer) with a ±10V signal, at 40 kHz. The MA40S4S transducer has a typical capacitance of 2550pF.
Without the transducer (load), the TC7920 output is very clean, but the problem appears when I connect the transducer to the output of the TC7920: the signal is distorted. On the datasheet, one of the applications is the drive of piezo-electric transducers, so, what is the problem with my application? The datasheet doesn't specify the range of the capacitance of the transducers that it can drive. The capacitance of my transducer could be the problem, I think, because it "charges" the TC7920, but the TC7920 should be able to drive my transducer.
Someone have had similar problems?
How I can solve my problem?