BQ25792: IQ_BAT_ON current

Roy Chou1

Genius 14465 points

Part Number: BQ25792

Tool/software:

Hi Team,

As datasheet, the IQ_BAT_ON is 540uA. (typical value)

Below is the test result from my customer. They didn't connect the Vbus, but Vbat provided the system power.

The current from BAT was 1.7mA. And the Vsys had 576uA. So we can get the IQ_BAT_ON was 1.7mA-0.576mA = 1.124mA. The value is 2.x times by typical value. Is it reasonable? Do we have any other way that can reduce the BQ current consumption? (Note: REG11_Charger_Control_2 Register sdrv_ctrl_1:0 is 0x00) And we need I2C at this moment.

Regards,

Roy

14 days ago

0 Jeff F 14 days ago

TI__Guru**** 154216 points

Hi Roy,

We do not spec max IQ_BAT_ON but 1.2mA is quite high. If they turn off the ADC, does the current go down? If not, then there is some other load on SYS and/or BAT.

Regards,

Jeff

0 Roy Chou1 13 days ago in reply to Jeff F

TI__Genius 14465 points

Hi Jeff,

Do you mean TS_ADC_DIS? We found that IQ can be reduced if we set 0x2f=0x04

But we have a JEITA disabled setting (reg 0x18 =0x35). Does it have any side effect if we turn off the REGN?

Regards,

Roy

0 Jeff F 13 days ago in reply to Roy Chou1

TI__Guru**** 154216 points

Hi Roy,

When in HiZ mode, REGN is only used for ADC to read TS_ADC_DIS so no issues with disabling all ADC channels or only TS_ADC_DIS.

Regards,

Jeff

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Power management

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BQ25792: IQ_BAT_ON current