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Texas Instruments BQ24123RHLRG4 — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24123RHLRG4 bqSWITCHER Li-Ion Charger IC, 2A, 8.4V

MPNBQ24123RHLRG4
End of Life

Texas Instruments bqSWITCHER™ BQ24123RHLRG4, Li-Ion/Polymer battery charger IC, 1-3 cells, 2A max charge current, 8.4V pack voltage, 16V max supply, constant-current programmable, over-temperature protection, -40°C to 85°C, 20-VFQFN Exposed Pad package, Tape & Reel.

$58.8000Ref. price · indicative, final on quote
BQ24123RHLRG4 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

BQ24123RHLRG4 Technical Specifications
ParameterValue
SeriesbqSWITCHER™
Mounting typeSurface Mount
Battery pack voltage8.4V
Voltage16V
Current - chargingConstant - Programmable
Charge current - max2A
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR)
Case20-VFQFN Exposed Pad
Number of cells1 ~ 3
Fault protectionOver Temperature
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent, Timer

Product details

2A charge current in a 3.5x4.5 mm QFN

The Texas Instruments BQ24123RHLRG4 is a bqSWITCHER synchronous-switch-mode Li-Ion/Li-Polymer charge controller. It delivers a programmable constant charge current up to 2A to a battery pack of 1 to 3 series cells, with a target pack voltage of 8.4V for a 2-cell configuration. The input supply ceiling is 16V, so it can run from a 12V rail or a 5V USB adapter without an external pre-regulator.

Programmable current and timer, over-temperature protection

Charge current is set with an external resistor — constant-current programmable — and the IC also includes a programmable safety timer to terminate charging if the battery does not reach full voltage within the window. Over-temperature fault protection shuts down the converter if the die exceeds the thermal threshold, a safeguard for tight enclosures.

Frequently asked questions

What is the charging current range of BQ24123?

The BQ24123RHLRG4 supports constant-current programmable charging with a maximum charge current of 2A. The actual current is set by an external resistor; the datasheet provides the resistor value table for the desired charge rate.

Can BQ24123 charge 3 cells?

Yes — the BQ24123RHLRG4 is specified for 1 to 3 series cells. For a 3-cell Li-Ion pack the target voltage is 12.6V, which is within the 16V maximum supply rating.

Is BQ24123RHLRG4 a replacement for BQ24123RHLR?

The BQ24123RHLRG4 and BQ24123RHLR share the same base product number BQ24123 and the same 20-VQFN package. The RHLRG4 suffix indicates Tape & Reel packaging; the RHLR suffix may denote a different reel quantity or tube. Functionally they are the same die — confirm the packaging format matches your assembly line.