BQ25756EEVM: Evaluation Module to charge super cap

Agxin Justin xavier

Part Number: BQ25756EEVM

Tool/software:

What are the setting needed to be updated to the EVM to charge a 0.1F cap (ELECTROLYTE ) from 0V to 28V ?

0 Michael Bradbourne 25 days ago

Hi,

You should change the FB resistor network or adjust the register (or a combination of both). The default configuration is 29.4 V.

Set EN_TERM = 0. This will stop the charge/recharge oscillation.

Set EN_PRECHG = 0. This will allow for full charge current at low capacitor voltages.

Adjust the input/output current limits to the system specifications.

Adjust the input ACUV/ACOV to the system specifications.

Let me know if this works.

Best regards,
Michael

0 Agxin Justin xavier 22 days ago in reply to Michael Bradbourne

Set EN_PRECHG = 0. This will allow for full charge current at low capacitor voltages.

this will support from 0V right no need external power source to change to a predefined voltage is that correct ?

0 Michael Bradbourne 22 days ago in reply to Agxin Justin xavier

This is correct.

Power management forum