BQ4050: The charge-discharge path of PCAK + to the battery pack（4p）

Zilin Yang

Part Number:

Tool/software:

Hello, I want to ask what charging path does PACK + charge the battery pack（4p） ? Only open the CHG, and turn off the DSG. Does CHG and DSG open at the same time when charging ?

Q1 and R1 in the pre-charge circuit of PCHG have been omitted, and PCHG is suspended.

What is the mode of CHG ON and DSG ON in the data manual ?

What does the following figure express  Can you help to answer it

21 hours ago

0 Alan Frias 19 hours ago

TI__Mastermind 25225 points

Hello,

This question has been assigned and will be reviewed when possible.

Thank you,
Alan

0 Miguel Castro Gonzalez 17 hours ago in reply to Alan Frias

TI__Prodigy 682 points

Hello Zilin,

Yes, both CHG and DSG turn on when charging.
In the datasheet, it mode means both FETs are fully on. Gauge is probably bypass the charge and just turning on the FETs so PACK+ and BAT+ are shorted with no load.
It explains the circuit of the FET pumps.
1. CHG only works from BAT voltage
2. DSG works from PACK and BAT.

-Miguel

0 Zilin Yang 8 hours ago in reply to Miguel Castro Gonzalez

Prodigy 30 points

Hello Miguel,

Thank you for your answer, which solves my doubts. What is the state of CHG and DSG when the battery pack discharges to PACK + ?

-Zilin

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BQ4050: The charge-discharge path of PCAK + to the battery pack（4p）