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BQ25601D: BQ25601D DPM and power path management related questions

Part Number: BQ25601D

Our customer have a project now.

They want to use BQ25601D. But they have some questions in the specification book. Please give pointers.

The system framework requires a charging current of about 1.5A, and the SYS current can reach a maximum of about 1.1A.

Considering that the end customer will use different adapters, 100mA, 300mA, 500mA, 1A, 3A input current, I don't know how the current of the backend BAT and SYS will be distributed? Will the adapter be pulled?

When charging, the system will work, requiring:

 

1. There are various currents at the input (100mA 200mA 500mA 1.5A 3A). When the input is a small current input, how can I ensure that the adapter at the input can not be overloaded? (Customer requested never be overloaded)

 

2. What is the order of the output terminals VBAT and SYS? How is the charging current distributed? How to make effective control

 

3. What parts can I2C control?

   4.1. Input: Current Detection? Overload Control? Excessive Current Limit?

   4.2. Output: Charging current control adjustment?

   4.3. Output: charging current and SYS sequence, control, distribution?

  • Eason:

    1. There is no issue that bq25601D supports your applications even with various input adaptor. First, bq25601D can identify different charging ports and set the input current limit at proper level. When SYS and battery required higher current than input current limit, charger current will reduce to maintain the energy balance. If necessary, battery can discharge to supply system. The same concept can apply to adaptors that are unknown.

    2. No need to control. Power is managed by internal loops

    3,4: bq25601D has register table in the datasheet. From the register tab, you know what parameters can be programmed.