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WEBENCH® Tools/BQ25703A: BQ25703 design issues

user4350698
Prodigy 30 points
Part Number: BQ25703A
Other Parts Discussed in Thread: BQ25703,

Tool/software: WEBENCH® Design Tools

BQ25703 design issues:
1. Can the maximum input current of BQ25703 be set to 6A? We can only input a maximum current of 4A, and cannot increase the input current.


2. Can BQ25703 achieve the following process:


(1) Adapter 12V is connected to the system, when the battery is not connected, VSYS needs to output 12.6V / 4A;

(2) Adapter 12V is connected to the system, the battery (3 batteries in series) is also connected to the system, VBAT charges the battery (charge Current 2A, the battery does not supply power to the load), and VSYS supplies 12.6V / 4A to the load;


(3) The 12V power of the adapter is cut off, and the load is powered by the battery.

  • 0
    TI__Mastermind 33275 points

    BQ25703A is a battery charge controller. The maximum input current setting is 6350mA,  with max 64mV across ACP and ACN pin, however, the maximum available current may be reduced due to inductor ripple. 

    BQ25703A can support 1) system power without battery 2) system power and battery charging and 3) power up from battery without DC source.