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Old 20th July 2011, 12:48 PM   #1
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Default Class D Amplifier with HIP4080A

Hi Everyone,

Im building a classd amp with HIP4080 but I didn't see anything on comparator output. Firstly, I supplied IN+ and IN-I for trying this output, but no signal there. May my HIP4080 is crashed(i tried two HIP4080, the same result ).(i tried 2~8 volts DC for inputs)

+general question: IN+ and IN- inputs have how much voltages and currents?
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Old 20th July 2011, 03:48 PM   #2
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check if you have anything similar to this

http://www.sensibleaudio.dk/HIP4080_...%20Class-D.pdf

taken from
Prototype 2
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Old 20th July 2011, 04:32 PM   #3
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No, my circuit isn't like that is ucd class d. My circuit have triangle generator (xr2206). I generate good triangle wave and sine wave like sound, then I tie these inputs to HIP4080's comparator inputs. But I didn't see anything on output pin(pin5).

My input signals ~0V mean value. It means my signals swing around 0v. Isn't it true? or anything else?
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