Skip to main content
Log in
BQ2057WSN

BQ2057WSN Li-Ion/Polymer Battery Charger IC, 2-Cell 8.4V

MPNBQ2057WSN
Active

Texas Instruments BQ2057WSN, Li-Ion/Polymer battery charger IC, 2-cell, 8.4V pack voltage, constant-current programmable, -20°C to 70°C, 8-SOIC package.

$4.8200Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ2057WSN specifications
ParameterValue
MountingSurface Mount
Battery pack voltage8.4V
Voltage15V
Current - chargingConstant - Programmable
Operating temperature-20°C~70°C(TA)
PackageTube
Case8-SOIC (0.154\", 3.90mm Width)
Number of cells2
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

The Texas Instruments BQ2057WSN is a linear battery charger IC designed for 2-cell lithium-ion or lithium-polymer packs, delivering a regulated 8.4V float voltage. It operates from a supply up to 15V and provides constant-current programmable charging, letting the designer set the charge rate with a single external resistor.

Charge control and design flexibility

The BQ2057WSN uses a constant-current / constant-voltage (CC/CV) charge algorithm. The charge current is programmable via a resistor from the ISET pin.

Frequently asked questions

Can BQ2057WSN charge a single lithium-ion cell?

No, the BQ2057WSN is designed specifically for 2-cell packs with an 8.4V regulation voltage. For single-cell Li-Ion charging, look at the BQ2057T or other single-cell charger ICs in the BQ2057 family.

Is BQ2057WSN compatible with lithium polymer batteries?

Yes, the BQ2057WSN supports both lithium-ion and lithium-polymer chemistries. The 8.4V float voltage and programmable constant-current charging are compatible with 2-cell Li-Polymer packs.