Solar Lithium Ion/Polymer charger - Charge rate Question

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adafruit
 
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Re: Solar Lithium Ion/Polymer charger - Charge rate Question

Post by adafruit »

without a scope its going to be very difficult to determine what is going on with your setup. we tested the design and do a test before shipping it, so its probably not the charger but something else going on with your setup.

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oby_one
 
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Re: Solar Lithium Ion/Polymer charger - Charge rate Question

Post by oby_one »

Uff, this will be hard ( but not impossible)
Please tell me what to check once I get to a friend that has a scope.

adafruit
 
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Re: Solar Lithium Ion/Polymer charger - Charge rate Question

Post by adafruit »

check the DC in to make sure its steady, check the LED STAT outputs, make sure they are not oscillating

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oby_one
 
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Re: Solar Lithium Ion/Polymer charger - Charge rate Question

Post by oby_one »

Today I will go to friend that has a scope.
I think you want me to measure the freq of the output, that should be around 1mhz.
But what about the output stat led? what to measure with it?

It would be better to describe exactly what you want me to do.

adafruit
 
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Re: Solar Lithium Ion/Polymer charger - Charge rate Question

Post by adafruit »

there should be no frequency at all!

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prashanf
 
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Re: Solar Lithium Ion/Polymer charger - Charge rate Question

Post by prashanf »

This is with regards to the MCP73871 charger status LEDs. When using USB charging mode, the PWR LED turns on and the rest of the LEDs are switched off (no load), the moment I connect the battery to the circuit all indicators turn on (PWR, CHRG/LBO, DONE). Is there any specific reason as to how this could occur? As I'm aware when charging the PWR and CHRG LEDs are supposed to turn ON. The battery voltage is 3.48V.

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adafruit_support_bill
 
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Re: Solar Lithium Ion/Polymer charger - Charge rate Question

Post by adafruit_support_bill »

@prashanf - This is a very old thread and your question is off-topic. Please start a new thread for your question.

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