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Mobile charger and audio amp power supply? Answered

Hello friends

i want to power mobile(feature) and audio amplifier (PAM8403) with single power supply. can you please help me? i am a beginner in electronics. how much voltage and amp i need for it. If i use 5volt 2Amp power supply.  will it burn PAM8403 if mobile not connected?

3 Replies

Downunder35m (author)2017-02-11

No clue as you did not mention any power requirements for your devices or any other specs for that matter.
In general a 2A charger is just enough to charge a mobile phone these days but not to power additional devices.

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jasveerg (author)Downunder35m2017-02-11

ok, 5volt 1amp for mobile and 5volt 1amp for PAM8403(audio amplifier) http://www.allelectronics.com/mas_assets/theme/allelectronics/spec/AMP-8403.pdf.

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Downunder35m (author)jasveerg2017-02-11

That would be on the limit of the supply but could still work if the amp is not at full power and a good sized capacitor is added to the output of the power supply.
But with a phone charger you will need some additional filters as otherwise you get a lot of high frequency noise on the speakers.

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