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Published on 2018-10-13 08:48 Only look at the author

When the 5V 2A charger is designed, the current drops when in CV mode [Copy link]

Why does the current keep dropping when the charger is in CV mode? It is designed with synchronous rectification. Can anyone help me?

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Was the heat dissipation of the chip not handled properly during layout? The power consumption caused the chip to overheat. Because it is a constant voltage output, the result of power reduction is a continuous decrease in current. Details Published on 2018-10-15 09:13

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2

Published on 2018-10-13 12:42 Only look at the author

I'm afraid the CV mode reference voltage is too affected by temperature changes. I'll post the schematic for everyone to see.

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3

Published on 2018-10-13 21:19 Only look at the author

The constant current cannot be achieved in CV mode. The reference voltage can be changed. Is the voltage set too high?

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4

Published on 2018-10-15 09:13 Only look at the author

Was the heat dissipation of the chip not handled properly during layout? The power consumption caused the chip to overheat. Because it is a constant voltage output, the result of power reduction is a continuous decrease in current.

This post is from Power technology

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