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VDS currents are higher than expected (MW7IC930N)

Question asked by Jason Patrick Hipolito on Jul 5, 2019
Latest reply on Jul 5, 2019 by dumitru-daniel.popa

I'm currently working on a prototype power amp using the MW7IC930N. In my ADS simulation, I used 28V for VDS1 and VDS2, and 3.16V and 2.922V for VGS1 and VGS2 respectively to get optimum performance (Gain = 35dB). The current consumption is 106mA and 286mA for VDS1 and VDS2.

 

However when I used the same voltages in my actual setup I'm getting a combined current of 1.1A (I'm using a single 28V supply for VDS1 and VDS2) and only a gain of 20-21 dB. Is there something that I could be missing?

 

I made sure that my pcb is properly grounded and that the IC has a proper heatsink below it.

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