BQ24105RHLRE3 Texas Instruments Integrated Circuit (Other) In Stock
BQ24105RHLRE3 is a synchronous switched-mode Li-Ion and Li-Polymer battery charge management IC with integrated power FETs, supporting charge currents up to 4 A from a 5 V input source, programmable charge voltage and current via external resistors, housed in a 20-pin QFN package for compact portable electronics designs.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 27
- Lifecycle
- OBSOLETE
- Datasheet
- BQ24105RHLRE3 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Synchronous switch-mode charging up to 4 A charge current for fast Li-Ion/Li-Pol charging
- Integrated high-side and low-side power FETs eliminate external MOSFETs
- Programmable charge voltage up to 4.2 V per cell via external resistor divider
- Input voltage range of 4.35 V to 6.5 V supports USB and AC adapter sources
- Thermal regulation loop prevents thermal runaway by reducing charge current automatically
- Status output pins enable LED or host processor charge-state monitoring
- 20-pin QFN package with exposed thermal pad for improved heat dissipation
Applications
BQ24105RHLRE3 is designed for portable consumer electronics such as tablets, portable speakers, and handheld gaming devices that use single-cell Li-Ion or Li-Polymer battery packs requiring efficient high-current charging. The device's integrated power FETs and thermal regulation loop make it well suited for compact power banks and USB-powered accessories where board space is limited. Medical handheld devices and industrial data loggers also benefit from the programmable charge parameters and protection features of this bqSWITCHER IC.
Specifications
| YTEOL | 0 |
| JESD-30 Code | R-PQCC-N20 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC20/24,.14X.18,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BQ24105RHLRE3:
Frequently Asked Questions
How high a charge current can BQ24105RHLRE3 deliver to a Li-Ion cell?
BQ24105RHLRE3 supports a maximum charge current of 4 A, set by an external resistor on the ISET pin. This high current capability enables fast charging of single-cell Li-Ion or Li-Polymer packs from 1 Ah to 4 Ah capacity, reducing full-charge time to approximately 1 hour at the maximum rate.
Which input supply range does BQ24105RHLRE3 accept, and does it support USB 5 V input?
BQ24105RHLRE3 operates from a 4.35 V to 6.5 V input, making it directly compatible with USB 5 V adapters and standard 5 V wall adapters. The internal dynamic power management circuit limits input current draw to prevent USB port overcurrent, keeping supply current below 500 mA when configured for USB charging.
How does BQ24105RHLRE3 protect the battery and system from overheating during fast charging?
An internal thermal regulation loop monitors junction temperature and automatically reduces charge current when the die exceeds approximately 125°C, preventing thermal runaway without requiring an external NTC thermistor. This allows full 4 A charging in open environments while gracefully throttling in confined enclosures, maintaining charge efficiency above 90%.
Can BQ24105RHLRE3 charge both Li-Ion and Li-Polymer batteries, and how is the termination voltage set?
Yes, BQ24105RHLRE3 supports both Li-Ion and Li-Polymer chemistries with a programmable termination voltage selectable between 4.1 V and 4.2 V per cell via a logic-level input pin. Standard Li-Ion cells use 4.2 V termination, while some high-energy Li-Polymer formulations may use 4.35 V with modified resistor settings.
For a compact portable speaker design, what PCB area does the BQ24105RHLRE3 QFN package occupy?
The BQ24105RHLRE3 comes in a 20-pin QFN package measuring 3.5 mm x 4.5 mm with 0.65 mm pin pitch and an exposed thermal pad, occupying less than 16 mm² of PCB area. The integrated FETs eliminate two discrete MOSFETs, allowing a complete 4 A charger to fit within a 100 mm² solution area including passive components.
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