BQ25606: BQ25606RGET_ when system load is on, pin SYS on Vout.

HoYu Cheng

Prodigy 70 points

Part Number: BQ25606

Hi All,

1 . How many output current pin_SYS at inrush current ?? How many second that can hold on at inrush current??

2. Pin_SYS is over current protected in our circuit, the measure as below show

CH1-Voltage_pin_sys, CH2-Voltage_BAT side, CH4-Current_BAT side

3. How to solve this issue???

BQ25606RGET_circuit.pdf

over 5 years ago

0 HoYu Cheng over 5 years ago

Prodigy 70 points

Hi All,

In circuit, R2555/ R2556/ R2560 is removed.

thansk!!

0 Joel Hernandez II over 5 years ago in reply to HoYu Cheng

TI__Mastermind 25800 points

Hey HoYu,

Can you try removing C2538, C2539, and C2540, and replacing with just 1x10uF capacitor.

We don't recommend that much capacitance on the BAT pin.

For 1, there is a 200mA input current limit to soft-start the VSYS rail when VBAT is too low or not present. Once VSYS is above 2.2V, there is no more soft-start. If you have a load on VSYS that draws current even below 2.2V, then the soft-start time will be extended.

For 2, I'm not sure if this is related to your battery caps from the my first comment.

Regards,

Joel H

0 HoYu Cheng over 5 years ago in reply to Joel Hernandez II

Prodigy 70 points

Hi Joel,

Remove C2538, C2539, and C2540, but result is the same.

please provide other solution.

wavefomr as below

thansk!!

0 Joel Hernandez II over 5 years ago in reply to HoYu Cheng

TI__Mastermind 25800 points

Hey HoYu,

Are you using a real battery or a simulator or e-load?

Regards,

Joel H

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BQ25606: BQ25606RGET_ when system load is on, pin SYS on Vout.