Hi, I'm currently working on a circuit using a TDA2050 audio chip (TDA2050 datasheet). See "Figure 1: Split Supply Typical Application Circuit" for a schematic of my circuit.
The actual resistance value isn't much of a problem. I've started with the recommended values and adjusted them to suit my circuit. The problem I have is that the datasheet doesn't appear to say how many watts each resistor should handle. I'm using 0.25W carbon film resistors as I have those in every available value but when I turn the volume up to full the 2.2Ohm resistor connected to pin 4 goes up in smoke.
How would I know how many watts this resistor needs? It's a 32W chip but I would expect most of that power to go through the speaker and theres a series capacitor in there too so I'm really not sure how to calculate it. Should I be worried about the other resistors too? So far they all look fine but I've only managed about 10 seconds before having to cut the power.
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