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BQ51050B: Modify EVM to work with external power adapter

Eesu
Prodigy 205 points
Part Number: BQ51050B
Other Parts Discussed in Thread: BQ24040EVM, BQ24040, BQ51013B,

I have a bq51050BEVM-764 (HPA764 Rev C) module. And want to test it with external power adapter as mentioned in "9.2.2 Application for Wired Charging" of the datasheet using bq24040EVM. But in the datasheet of bq51050BEVM, it says " adapter option is not supported in this HPA764-002". On the EVM, the FETs Q1 are not soldered and BAT is directly connected to J3 (OUT).

It seems I cannot connect the bq24040EVM even if I add Q1 on bq51050BEVM because BAT is directly connected to J3 (OUT) bq51050BEVM. Is there way I can test these two EVMs together?

  • 0
    TI__Guru* 75656 points
    You are correct regarding the connection on bq51050 Bat, Adapter output and limitation of EVM. Circuit you are interested in is show in data sheet figure 37.
    Another device that may work is the bq51013B, it is a power supply with Q1 installed. But input to the bq24040 would be 5V from wireless power or adapter while only the bq24040 is connected to battery.
  • 0 in reply to Bill Johns
    Prodigy 205 points
    So, there is no way to use the bq51050BEVM with the charger EVM, right?

    One more question:
    bq51050B is v1.2 compliant but BQ51013B is only WPC v1.1 compliant. Isn't this correct?
  • 0 in reply to Eesu
    TI__Guru* 75656 points

    Eesu said:
    So, there is no way to use the bq51050BEVM with the charger EVM, right? -- Right
     
    One more question:
    bq51050B is v1.2 compliant but BQ51013Bis only WPC v1.1 compliant. Isn't this correct?---They are both v1.2 compliant.