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Texas Instruments BQ24721CRHBTG4 — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24721CRHBTG4 battery charger IC, I²C, 3-4 cell, 19.2V max

MPNBQ24721CRHBTG4
End of Life

Texas Instruments BQ24721CRHBTG4, multi-chemistry battery charger IC, I²C interface, 3~4 cells, 19.2V max battery pack voltage, 24V supply max, overcurrent protection, -40°C~85°C, 32-VFQFN Exposed Pad package.

BQ24721CRHBTG4 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

BQ24721CRHBTG4 Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage19.2V (Max)
Voltage24V
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR)
Case32-VFQFN Exposed Pad
Number of cells3 ~ 4
Fault protectionOver Current
Battery chemistryMulti-Chemistry
Programmable featuresCurrent

Product details

Multi-chemistry charger with I²C control for 3–4 cell packs

The Texas Instruments BQ24721CRHBTG4 is a multi-chemistry battery charger IC designed for 3-4 series cells, supporting Li-ion, Li-Po, and other chemistries. It communicates over an I²C interface, allowing the host microcontroller to set charge current, voltage thresholds, and monitor status. The part integrates overcurrent fault protection, reducing external sense circuitry.

Charge voltage ceiling and supply headroom

The maximum battery pack voltage is 19.2V, which covers 4-series Li-ion (nominal 14.8V, full charge 16.8V) and 3-series (nominal 11.1V, full charge 12.6V) with margin. The charger accepts a supply voltage up to 24V, so a standard 19V laptop adapter or a 20V USB-C PD source provides adequate headroom for regulation.

Frequently asked questions

Is BQ24721CRHBTG4 a direct replacement for BQ24721CRHBR?

The BQ24721CRHBTG4 and BQ24721CRHBR share the same base product number (BQ24721) and electrical specification, but the suffix indicates different packaging or tape/reel options. The BQ24721CRHBTG4 is supplied in Tape & Reel; the BQ24721CRHBR may differ in reel quantity or carrier width. Confirm the mechanical compatibility with your pick-and-place setup before substituting.

Does BQ24721CRHBTG4 support charging of 4 series Li-ion cells?

Yes. The part is specified for 3 to 4 cells, and the maximum battery pack voltage of 19.2V accommodates a 4-series Li-ion stack (full charge ~16.8V) with headroom.