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Texas Instruments BQ24271RGER — Power Management (PMIC / Gate Driver)

BQ24271RGER I²C Li-Ion Charger, 1.5A Max, 24-VQFN

MPNBQ24271RGER
Active

Texas Instruments BQ24271RGER, single-cell Li-Ion battery charger, I²C programmable charge current up to 1.5A, 6V max supply, 24-VQFN (4x4) package, -40 to 85°C operating range.

$5.6160Ref. price · indicative, final on quote
Texas Instruments BQ24271RGER datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ24271RGER specifications
ParameterValue
MountingSurface Mount
Battery pack voltage3.7V
Supply voltage6V
Current - chargingConstant - Programmable
Charge current - max1.5A
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR)
Case24-VFQFN Exposed Pad
Number of cells1
Fault protectionOver Temperature, Over Voltage, Short Circuit
Battery chemistryLithium Ion
Programmable featuresCurrent

Product details

Maximum charge current is 1.5 A, set via the I²C bus, which lets firmware adapt the charging rate to battery capacity or thermal conditions without a board spin.

1.5 A charge current — what it means for charge time and thermals

At 1.5 A max, a typical 1500 mAh single-cell Li-Ion pack charges in about an hour from flat, assuming the input supply can deliver the power.

Industrial temperature range and protection

On-chip fault protection covers over-temperature, over-voltage, and short-circuit, so the charger can survive a bad battery connection or a stalled fan without external clamp diodes.

The BQ24271 base product number is current; TI has not announced an EOL or successor for this part.

Frequently asked questions

What is the maximum charge current of BQ24271RGER?

The maximum charge current is 1.5 A, programmable via the I²C interface.

Is BQ24271RGER compatible with single-cell Li-Ion batteries?

Yes, it is designed for single-cell Li-Ion packs with a nominal battery voltage of 3.7 V.

How to program the charge current on BQ24271RGER?

The charge current is set through the I²C interface by writing to the current-control register. No external resistor is needed; the current is constant and programmable.

What are equivalent parts to BQ24271RGER?

For a pin-compatible alternative, review the TI BQ2427x family — the BQ24270 and BQ24272 share the same package and I²C interface but differ in charge current ceiling and feature set. Confirm the specific BOM requirements before substituting.