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Texas Instruments BQ24070RHLTG4 — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24070RHLTG4 Texas Instruments Li-Ion Charger IC, 1.5 A Max

MPNBQ24070RHLTG4
End of Life

Texas Instruments BQ24070RHLTG4 single-cell Li-Ion/Polymer linear charger IC, 1.5 A max charge current, 4.2 V battery pack voltage, programmable current and timer, 20-VFQFN Exposed Pad package, -40°C to 125°C junction temperature range.

$1.7200Ref. price · indicative, final on quote
BQ24070RHLTG4 datasheet
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MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
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Specifications

BQ24070RHLTG4 Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage4.2V
Voltage16V
Current - chargingConstant - Programmable
Charge current - max1.5A
Operating temperature-40°C~125°C(TJ)
PackageTape & Reel (TR)
Case20-VFQFN Exposed Pad
Number of cells1
Fault protectionOver Temperature, Reverse Current, Short Circuit
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent, Timer

Product details

1.5 A programmable linear charger for single-cell Li-Ion/Polymer

The Texas Instruments BQ24070RHLTG4 is a linear charger IC designed for single-cell Lithium-Ion and Lithium-Polymer battery packs, delivering a programmable charge current up to 1.5 A with a fixed 4.2 V termination voltage.

16 V input, industrial temp, and built-in fault protection

The supply input is rated up to 16 V, which covers USB bus voltage (5 V nominal) and unregulated wall-wart outputs up to 12 V with margin for transients. On-chip fault protection includes over-temperature, reverse-current blocking, and short-circuit detection — these reduce the external protection component count and improve system reliability during charge faults or battery disconnect events.

Programmable charge current and safety timer

The charge current and the safety timer are both set with external resistors, giving the designer control over the charge profile without changing the IC. The timer provides a backup termination if the battery never reaches the 4.2 V regulation voltage within the programmed window.

Frequently asked questions

Is BQ24070RHLTG4 a linear or switching charger and what is its max charge current?

It is a linear charger with a maximum programmable charge current of 1.5 A. The linear topology means no inductor is needed, but thermal management of the 20-VFQFN package is critical at high charge rates.

Can BQ24070RHLTG4 charge lithium-polymer batteries safely?

Yes, the BQ24070RHLTG4 is designed for Lithium-Ion and Lithium-Polymer chemistries with a 4.2 V termination voltage. On-chip fault protection against over-temperature, reverse current, and short circuit adds a safety layer during charging.

What is the difference between BQ24070 and BQ24071 charger ICs?

The BQ24070 and BQ24071 are pin-compatible siblings in the same family. The primary difference is the battery regulation voltage: the BQ24070 terminates at 4.2 V, while the BQ24071 terminates at 4.1 V. Choose the BQ24070 for standard Li-ion cells and the BQ24071 for cells requiring a lower float voltage.