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Texas Instruments BQ25121AYFPR — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ25121AYFPR single-cell linear charger IC, 300mA, I²C

MPNBQ25121AYFPR
Active

Texas Instruments BQ25121AYFPR single-cell linear battery charger IC, multi-chemistry, I²C programmable charge current/timer/voltage, 300 mA max charge current, 4.65 V battery pack voltage, over-current/over-voltage/short-circuit protection, -40°C to 85°C, 25-DSBGA package, Tape & Reel.

$2.2050Ref. price · indicative, final on quote
BQ25121AYFPR datasheet
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

BQ25121AYFPR Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage4.65V
Voltage5.5V
Current - chargingConstant
Charge current - max300mA
InterfaceI²C
Operating temperature-40°C~85°C
PackageTape & Reel (TR)
Case25-XFBGA, DSBGA
Number of cells1
Fault protectionOver Current, Over Voltage, Short Circuit
Battery chemistryMulti-Chemistry
Programmable featuresCurrent, Timer, Voltage

Product details

Single-cell linear charger with I²C programmability

The Texas Instruments BQ25121AYFPR is a single-cell linear battery charger IC designed for multi-chemistry cells. It delivers a constant charge current up to 300 mA and regulates the battery pack voltage to 4.65 V. The charge parameters — current, timer, and voltage — are programmable via the I²C interface, giving the designer control over the charge profile without external resistor networks.

Built-in fault protection reduces external BOM

Over-current, over-voltage, and short-circuit protection are integrated on-chip, eliminating the need for discrete protection components on the charge path. This simplifies the PCB layout and shrinks the solution footprint for space-constrained designs like wearables or IoT modules.

Frequently asked questions

Is BQ25121AYFPR compatible with LiPo batteries?

Yes — the charger supports multi-chemistry cells. With a battery pack voltage of 4.65 V and a programmable charge voltage via I²C, it can be configured for single-cell LiPo or Li-ion batteries that terminate at 4.2 V or 4.35 V.