bq77910 Precision Protector

Texas Instruments' standalone 4-10 cell precision protector for Li-Ion chemistries

Texas Instruments bq79910 Precision Protector

Texas Instruments' bq77910 precision protector is a complete stand-alone, self-contained battery-protection and cell-balancing device intended for Li-ion/polymer battery packs. The bq77910 monitors 4 to 10 series individual cell voltages and provides fast-acting outputs which may be used to drive N-channel MOSFETs to interrupt the power path. Activation delays and recovery methods for each safety condition are fully programmable in non-volatile memory. Automatic cell balancing is provided using internal 50-mA cell circuits. A robust balancing algorithm ensures optimum performance by maintaining all cell voltages in balance. Balancing may be configured to operate at all times, only during charge, or can be disabled completely. bq77910 Datasheet

Features	Applications
4-, 5-, 6-, 7-, 8-, 9-, or 10 series cell protection Individual cell-voltage monitoring Low-side NMOS FET drive for charge and discharge control Compatible with 1 mΩ current-sense resistor Supply-voltage range from 5.6 V to 50 V Integrated 3.3 V micro-power LDO regulator Low supply current	Cordless power tools Cordless lawn equipment Electric bikes UPS Medical equipment Light electric vehicles (LEV)

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Texas Instruments Part Number	Digi-Key Part Number	Packaging	Battery Chemistry	Package
BQ77910DBTR	296-28773-2-ND	Tape & Reel	Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)	38-TFSOP (0.173", 4.40 mm width)
	296-28773-1-ND	Cut Tape
	296-28773-6-ND	Digi-Reel®

Evaluation Module

Texas Instruments Part Number	Digi-Key Part Number	Description
BQ77910EVM-001	296-29303-ND	Evaluation Module for bq77910