Cutoff Load while charging the Lipo battery

Thread Starter

Johnny1010

Joined Jul 13, 2014
96
I want to cutoff the battery from load, while charging it. Schematic of the designed circuit is attached. I have used a PNP transistor to do it. Positive terminal of the battery is connected to emitter, charger positive input is connected to base. Simulation is running good but I want to know would this circuit work in hardware? Is there any problem with the circuit?
upload_2016-6-24_12-38-7.png
 

eetech00

Joined Jun 8, 2013
3,958
Hi

Try a logic level N mosfet.
Connect G to IC Charge pin. S to GND. Load between +V and D.
When charging starts, mosfet shuts off and disconnects the load.
When charging stops, mosfet turns on and connects the load.

If not already using the charge pin to light an LED, PU charge pin thru 47k resistor to +V.
 
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