MP2617H Charge Error

Battery Management
1

Hi,
I have MP2617H on my circuit to charge 18650 battery up to 3.7V however I am seeing that the CHGOK starts flashing after a period of time.
Here is the circuit

image
image753×495 34.8 KB

Additional info:
Supply Voltage: 12V
Max Input Current: 2.5A
Max Charge Current: 2A
NTC: 10k
Mode: Default
Output Voltage: ~3.7V

I think some of the resistors may be wrong value, but can’t determine which ones?
Any advise would be much appreciated.

Thank you

2

Hello,

Is the battery fully charged when CHGOK blinks?
CHGOK blinks if a fault condition occurs. Here are some things you can check below.

  • Trickle charge time. A timer out condition is triggered if it’s in trickle charge mode for long than trickle charge timer period.
  • End of charge fault condition
  • Battery temp (NTC fault)

More details about CHGOK blinking on page 17-19 of datasheet.

Best Regards,
Yu