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BQ76940: Is it available for lithium iron phosphate battery?

Part Number: BQ76940
Other Parts Discussed in Thread: BQ76200, BQ76952, BQ77216


My customer is trying to use BQ76940, for the spec below. Is there any problem using it?


1. Battery: lithium iron phosphate battery

2. Series : 15S

3. cell voltage: 2V~3.6V

And if I can use it, I would like to use it as a combination of BQ76940 + BQ76200+MCU.

Do you have any material for reference? 


  • Hi David, 

    The BQ76940 should work with LFP batteries, the only thing to really consider is that the minimum power requirements of the device itself are met. 

    Before continuing with this device, I wanted to make you aware of our BQ76952 monitor for 3-16s applications which leverage many of the same features as BQ76940 with improved accuracy and performance. This device will also include an integrated high side driver (no BQ76200 necessary) and integrated charge pump to drive the FETs.

    BQ76952 will also feature an autonomous mode (no MCU required) that allows the device to handle protection events on its own. Alternatively, the device can also be host controlled and has integrated LDO's to supply MCU power as well as flexible power modes to fit a variety of use cases.

    Please visit our product page for more information, you may also find our design resources useful for starting out by leveraging our device reference designs. 

    Here one of our reference designs featuring our BQ76952 monitor and BQ77216 protector you may find useful: 

    TIDA-010208 — 10s-16s battery pack reference design with accurate cell measurement and high-side MOSFET control

    Please let me know if you have any questions/concerns.


    -Luis Torres