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Texas Instruments BQ24123RHLR — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24123RHLR Texas Instruments bqSWITCHER Li-Ion Charger IC

MPNBQ24123RHLR
Active

Texas Instruments bqSWITCHER™ series, BQ24123RHLR, a 1-3 cell Lithium Ion/Polymer battery charger IC, 2A max charge current, 16V supply max, in a 20-VFQFN Exposed Pad package.

$5.5600Ref. price · indicative, final on quote
BQ24123RHLR datasheet
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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.
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Specifications

BQ24123RHLR 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); Cut Tape (CT)
Case20-VFQFN Exposed Pad
Number of cells1 ~ 3
Fault protectionOver Temperature
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent, Timer

Product details

What the BQ24123RHLR does in a battery-powered design

The BQ24123RHLR is a constant-current, constant-voltage charger for 1 to 3 series Lithium Ion or Polymer cells, with a programmable charge current up to 2 A and a battery pack voltage of 8.4 V. It belongs to the bqSWITCHER™ family, which integrates a synchronous PWM controller and power FETs to minimise heat in the 20-VFQFN package. The input supply can go up to 16 V, making it suitable for 5 V USB or 12 V wall adapters without an external pre-regulator.

Charge current and cell-count flexibility

The charger handles 1, 2, or 3 cells in series, with the battery pack voltage set to 8.4 V for a 2-cell stack (the 3-cell termination voltage is higher, but the IC's 8.4 V rating suggests a 2-cell target; the 1-3 cell range covers 4.2 V to 12.6 V packs). Charge current is programmable via an external resistor, and a timer provides backup termination if the current taper doesn't complete within the set window. Over-temperature protection shuts down the charger if the die exceeds the safe junction limit, which is useful in tight enclosures with limited airflow.

Frequently asked questions

How many cells can the BQ24123RHLR charge?

It supports 1 to 3 series Lithium Ion or Polymer cells. The battery pack voltage is listed as 8.4 V, which corresponds to a 2-cell configuration; for 3 cells the termination voltage would be 12.6 V, so confirm the pack voltage matches your design.

Can the BQ24123RHLR charge a 3S (3-cell series) battery pack?

Yes, the IC supports 1 to 3 cells in series. For a 3S pack, the termination voltage is typically 12.6 V, which is within the charger's capability as long as the input supply is high enough (the IC can accept up to 16 V input). Confirm the battery pack voltage setting matches your cell chemistry.