I have an ultra-low power consumption application, and I am using the EVM for TLV320AIC3262. When I power the Class D voltage with a separate DC power supply at 3.3V and start running the Codec for class D output, even with no sound playing (and no speaker connected at all) it starts to draw 18mA from the supply. The carrier frequency is 250kHz and I can see both the plus and minus outputs switching from Gnd to 3.3V at 250kHz with 50% duty cycle as expected...so is this simply I = C*V*f and we are driving about 20nF of load on the EVM board?? I then took out two 4.7nF caps I saw on the EVM schematic output (C99 and C101) but it was still drawing 14mA. I don't see any other capacitance the output is driving. I was planning to make our own PCB with very little capacitance on the class D output to confirm, but we need to get the "no sound" power consumption near 200uA. Is this just an output capacitance issue?? Thanks for any guidance!!
Note: A similar previous post did not fully answer this question. It was "TLV320AIC3212 Class-D Speaker High Current Consumption Issue in No sound Playing Condition"
