BQ77915EVM-014: 3 to 5-Series Li-Ion Series Charger With Autonomous Cell Balancing

Summary

The BQ77915EVM-014 evaluation module (EVM) is a complete evaluation system for the bq77915 3-series to 5-series low-power protector for lithium-ion cells. The EVM includes one bq77915 and FETs to control current in a configuration typical for switching current in a lithium-ion battery pack. The circuit module includes one bq77915 integrated circuit (IC), a sense resistor, a thermistor, two FETs, and all other onboard components necessary to switch charge and discharge current.

The circuit module connects between a battery source and a pack load. In addition to the current and voltage applied to the module, the user can remove onboard jumpers to simulate overtemperature or under temperature conditions to observe FET control under different charge and discharge conditions. Balancing of unmatched cells can also be performed on the module.

Features

  • 3-series to 5-series lithium-ion protector with full suite of V/I/T protection functions

  • Low power consumption (8 µA typ in normal mode, 2 µA typ in hibernate mode)

  • Autonomous smart cell balancing

  • FETs to demonstrate current control

Specifications

Manufacturer Texas Instruments
Category Power Management
Sub-Category Battery Chargers
Eval Board Part Number 296-50752-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Cell Type Lithium Ion, Li-Ion
Configuration 3 ~ 5 in Series
Voltage In 3 ~ 22 V
Voltage Out 0 ~ 22 V
Current Out 4 A
Features Cell Balancing
Over Voltage Protection
Shutdown, Enable, Standby
Thermal Protection
Under Voltage Protection, Brown-Out
Quiescent Current [Typical] 8 µA
Sleep Mode Current [Typical] 2 µA
Component Count + Extras 60 + 33
Application / Target Market Auxiliary Power Supply
Drones
Electric Vehicles
Power Tools
Robotics
Design Author Texas Instruments
Main I.C. Base Part BQ77915
Quiescent Current [Maximum] 15 µA
Sleep Mode Current [Maximum] 3 µA

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