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Texas Instruments BQ24296RGER — Power Management (PMIC / Gate Driver)

BQ24296RGER – Texas Instruments Li-Ion Battery Charger IC

MPNBQ24296RGER
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Texas Instruments BQ24296RGER, single-cell Lithium Ion/Polymer battery charger IC, 3A maximum charge current, I²C programmable, 24-VFQFN Exposed Pad package, -40°C to 85°C operation.

$4.0400Ref. price · indicative, final on quote
Texas Instruments BQ24296RGER datasheet (PDF)
Packaging24-VFQFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ24296RGER specifications
ParameterValue
MountingSurface Mount
Battery pack voltage4.2V
Supply voltage6.2V
Current - chargingConstant - Programmable
Charge current - max3A
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case24-VFQFN Exposed Pad
Number of cells1
Fault protectionOver Current, Over Temperature, Over Voltage
Battery chemistryLithium Ion/Polymer

Product details

The I²C interface lets a host controller adjust charge parameters on the fly — termination current, pre-charge threshold, and timer limits — without external resistor dividers.

At 3A max charge current, this IC can fill a typical 18650 cell (3000–3500 mAh) in about an hour — limited by the cell's own C-rate. The constant-current phase is programmable via I²C, so the same BOM can charge a 500 mAh coin cell at a lower current without hardware change. Supply voltage max is 6.2V, which means the part works from a 5V USB rail or a standard 5V wall adapter without a pre-regulator. The battery pack voltage is fixed at 4.2V, matching the termination voltage for standard Li-Ion and Li-Polymer cells.

Package and thermal considerations for layout

The fault protection block includes over-current, over-temperature, and over-voltage — these are hardwired, not reliant on the I²C controller being active.

Frequently asked questions

Is BQ24296RGER equivalent to BQ24295?

Both are single-cell chargers from the same base family (BQ24296 vs BQ24295) with the same 24-VQFN package. The key difference is the I²C register map and charge algorithm — confirm your firmware target before swapping. No official cross-reference is published by TI.

Can BQ24296RGER be used with a single 18650 Li-ion cell?

Yes. The charger supports one Li-Ion or Li-Polymer cell with a 4.2V pack voltage. The 3A max charge current is well within the typical 1C rate of a standard 18650 cell. Program the current via I²C to match the cell's datasheet rating.

Is BQ24296RGER compatible with lithium polymer batteries?

Yes. The battery chemistry is listed as Lithium Ion/Polymer, so it works with both Li-Ion and Li-Polymer cells. The 4.2V pack voltage is the standard termination for these chemistries.