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Texas Instruments BQ24171RGYT — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24171RGYT - Texas Instruments Li-Ion/Polymer Battery

MPNBQ24171RGYT
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Texas Instruments BQ24171RGYT, a synchronous switch-mode Li-Ion/Polymer battery charger IC, 1-3 cells, 4A max charge current, 17V input, surface-mount 24-VQFN exposed-pad package, industrial temperature range.

$5.8300Ref. price · indicative, final on quote
BQ24171RGYT 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

BQ24171RGYT Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage2.1V
Voltage17V
Current - chargingConstant - Programmable
Charge current - max4A
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case24-VFQFN Exposed Pad
Number of cells1 ~ 3
Fault protectionOver Current, Over Temperature, Over Voltage
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

What the 4A charge current and 17V input mean for your board

The BQ24171RGYT is a synchronous switch-mode Li-Ion/Polymer charger IC from Texas Instruments, supporting 1 to 3 series cells with a programmable constant-current charge up to 4A max. The 17V maximum supply voltage lets it work directly from 5V USB, 12V adapters, or 15V wall warts without an external pre-regulator — a practical simplification for multi-voltage-input designs. Charge current is programmable via an external sense resistor, so the same IC can serve a 500 mA wearable and a 4A tablet charger by changing one resistor value.

Industrial temperature range and fault protection

Built-in over-voltage, over-current, and over-temperature fault protection reduces the external component count for safety certification and protects the battery pack from abuse conditions.

Package and thermal layout note

A four-layer board with thermal vias under the pad is the standard approach.

Lifecycle and sourcing posture

Available in Tape & Reel (TR) or Cut Tape (CT) options — the CT variant suits prototype and low-volume builds; TR is standard for production reels.

Frequently asked questions

What is the difference between BQ24171RGYT and BQ24171RGYR?

Both share the same base product number BQ24171 and identical electrical specifications. The suffix difference is packaging: RGYT is Tape & Reel (TR) or Cut Tape (CT), while RGYR is typically the same 24-VQFN package in a different reel format. Confirm the exact reel quantity and tape width with your distributor — the IC itself is the same die.

Can BQ24171RGYT charge a single-cell Li-Ion battery?

Yes — the BQ24171 supports 1 to 3 series cells. For a single-cell application, configure the cell-count pin (VSEL) to the 1-cell setting. The 2.1V minimum battery pack voltage is well below a single-cell Li-Ion's empty voltage (~3.0V), so charging starts correctly.