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BQ25570 VSTOR at 1.2V

Michael Liesenberg85
Mastermind 7560 points
Other Parts Discussed in Thread: BQ25570

Hi,

i have the BQ25570 circuit on a custom PCB and i have used the same schematics as the evaluation kit.

The only differences are the resistors for VOUT and OK_PROG/OK_HYST.

Now the LBOOST seems to be working becouse the output is a peak voltage:

Yellow: 3.7V LiOn Battery 2200maH

Green: VSTOR

BLUE: LBOOST

Why is my VSTOR not as high as 1.8V?  And Why is my  VBAT_OK low?

Here is my schematics:

The Solar Panel is a YH-36X56 with 0.5V and 200mA.

 

The VBAT _OK_HYST is set to 3.3V and the VBAT_OK is set to 3.1V

VBAT_OV is set to 4.2V