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Texas Instruments BQ2057WTSTR — Power Management (PMIC / Gate Driver)

BQ2057WTSTR Li-Ion/Polymer Charger IC, 2-Cell, 8.4V, Active

MPNBQ2057WTSTR
Active

Texas Instruments BQ2057WTSTR, Li-Ion/Polymer charger IC, 2-cell, 8.4V pack voltage, constant-current programmable, 8-TSSOP package, surface mount, active.

$3.4200Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ2057WTSTR specifications
ParameterValue
MountingSurface Mount
Battery pack voltage8.4V
Supply voltage15V
Current - chargingConstant - Programmable
Operating temperature-20°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case8-TSSOP (0.173\", 4.40mm Width)
Number of cells2
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

2-cell Li-Ion/Polymer charge controller in 8-TSSOP

The Texas Instruments BQ2057WTSTR is a constant-current programmable charger IC designed for 2-cell Lithium Ion or Lithium Polymer battery packs, with a target pack voltage of 8.4V. It handles the charge termination and safety timing for portable equipment where the battery stack is two series cells.

Programmable charge current and supply range

Charge current is set by an external resistor — the IC itself is a linear controller, so the power dissipation depends on the input-to-pack voltage differential and the programmed current. Maximum supply input is 15V, which gives headroom for common 12V or 9V wall adapters.

Frequently asked questions

Can BQ2057WTSTR charge 2-cell lithium polymer batteries?

Yes, it is designed for 2-cell Lithium Ion/Polymer packs with a nominal 8.4V pack voltage. The charge current is constant and programmable via an external resistor.