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BQ21040: Battery Resistance vs Charge Current

Part Number: BQ21040

Hello,

I am using BQ21040 in my application.When i connect battery ,the IC becomes HOT and charge LED doesn't turn ON.

But when i connect another battery LED ON and battery charges,but again IC becomes HOT.

When i tried external load,in that case its working fine.

Can you tell me whats happening ?need any specific battery