BQ25173-Q1: Can you recommend another supercaps charger which can set charging current 1.5A or higher?

Hi Max

The BQ25173-Q1 can operate in parallel to provide more current, is this a possible options?

I thought about that too, but can BQ25173-Q1 outputs short together and connect to supercaps?

what is the consequence if one output is little higher than another output, or missing enable timing, can this cause any damage?

Thanks

Hi Max

How much output current do you need and what is charge voltage?

I need around 1.5A - 2A, 5V, input 13V

Hi Max 

The 13V input to 5V output will generate a lot of power dissipation on a linear charger.  

If a switching converter is an option take a look at BQ25856-Q1.

hi Bill,

I have 30F/3V supercap, I planned to use 4-8 pcs, and charging current down to 1A-1.5A max, do you have better suggestion ?

I felt BQ25856-Q1 maybe too heavy for charging these supercaps.

Thanks

Max

what is the quiescent current when CE is high for BQ25856-Q1?

Hi Max

Max Chen1 said:

I felt BQ25856-Q1 maybe too heavy for charging these supercaps.

If a non Q1 device is an option -- Take a look at the BQ24640.  It is a buck switching charger.

hi Bill,

Could you check another idea?

(5) TPS551892-Q1: buck-boost to charging supercaps - Power management forum - Power management - TI E2E support forums

please comment to see if it is ok

Thanks

Max

Hi Max

Sorry do not support the TPS551892-Q1.