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BQ2057WSN
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RoHS Compliant · Lead-Free EIA-481 Standard
Texas Instruments / Power Management (PMIC / Gate Driver)

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

MPN BQ2057WSN
Active Spot Stock · 24-48h Dispatch 100% Original Sealed

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.

In Stock: 507 pcs
MOQ: 1 pcs
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Dispatch: Shenzhen / HK
Unit Price (USD)
$4.82 / pc
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1+ pcs
$4.82
10+ pcs
$4.34
30+ pcs
$3.95
100+ pcs
$3.57
500+ pcs
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$4.82 / ea

507 in stock — maximum per order · 3–4 days lead time

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100% Original Sealed 45x Microscope QC 30-Day Warranty · COC USD T/T & PI · DAP/DDP
[SPEC] Essential Parameters Snapshot Full Specifications (10)
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supply Voltage 15V

Full Technical Specifications

10 Parameters
BQ2057WSN specifications
Parameter / AttributeSpecification / Value
MountingSurface Mount
Battery pack voltage8.4V
Supply 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
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Technical Details & Description

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.

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