BQ2057C: BQ2057C

Rahul

Part Number: BQ2057C
Other Parts Discussed in Thread: BQ2057, BQ24040

Hi,

Kindly know how to calculate the RT1 & RT2 value of the NTC block resistor.

Battery: 3.7V/2200mAh

Battery has inbuilt thermistor resistor, value of 10K. Data sheet is attached .

Kindly know how to calculate the RT1 & RT2 and close the charger block design.

NTC part Number used inside the battery: ST016-103J410HLR0300

0 Bill Johns over 6 years ago

Hello

For the Charge temp range you want 0C to 40C?

What is your input voltage range?

0 Rahul over 6 years ago in reply to Bill Johns

Hi Bill Johns,

The operating temperature range of charge is 0-40oC

Input Voltage Range to the charger IC: 5V [TYP]

Thanks,

Rahul

0 Bill Johns over 6 years ago in reply to Rahul

Hello Rahul

The BQ2057 is an older generation device with a large number of external parts.

The BQ24040 should meet your requirements, it is a smaller device with very few external parts.

Another engineer assisted with calculations based on your inputs, see below. Thanks Alex

Power management forum