BQ25611D Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
Texas Instruments BQ25611D is an I2C-controlled single-cell lithium-ion/lithium-polymer buck battery charger delivering up to 3 A charge current and 1.2 A boost output, with integrated USB BC1.2 detection in a compact QFN package. It supports 4.2 V battery regulation and features a synchronous boost mode for USB OTG power output. Available from stock worldwide with competitive pricing and fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 25
- Lifecycle
- ACTIVE
- Datasheet
- BQ25611D Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3 A fast-charge current with I2C control enables precise, software-configurable charging for 1-cell Li-ion/LiPo batteries
- 1.2 A synchronous boost output for USB OTG powers peripherals directly from the battery without additional converter ICs
- Integrated USB BC1.2 detection auto-identifies charger types to maximise input current and minimise charge time
Applications
The BQ25611D is designed for smartphones, wireless earbuds, and portable Bluetooth speakers that require fast single-cell charging at up to 3 A alongside USB OTG functionality to power accessories from the battery. Its I2C interface allows the host MCU to dynamically adjust charge voltage, current, and safety timers, making it equally valuable in smart wearables and IoT hubs with sophisticated power management firmware. The integrated USB detection and QFN footprint simplify BOM and PCB layout for space-constrained portable electronics that must comply with USB charging standards.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BQ25611D:
Frequently Asked Questions
How fast can BQ25611D charge a single-cell Li-ion battery, and how is the current configured?
The BQ25611D supports a maximum charge current of 3 A for 1-cell Li-ion or LiPo batteries with a default charge voltage of 4.2 V. Charge current is set via the I2C interface in programmable steps, enabling the host processor to adapt the charging rate to available input power or thermal conditions in real time.
Which USB charging standards does BQ25611D detect automatically to optimise input current?
The device integrates USB BC1.2 detection that identifies SDP (500 mA), CDP (1.5 A), and DCP (up to 1.5 A) adapter types. This automatic detection allows the charger to draw the maximum permitted input current from each source, reducing total charge time without manual configuration by the host software.
How can BQ25611D power external USB peripherals directly from the battery in OTG mode?
In boost (OTG) mode, BQ25611D operates its synchronous converter in reverse, drawing power from the single Li-ion cell and boosting it to a regulated 5 V output at up to 1.2 A, sufficient to charge a secondary device or power a USB peripheral such as a flash drive or keyboard from the host battery.
For a compact wearable PCB, how does the QFN package of BQ25611D help minimise board area?
The BQ25611D is offered in a small QFN package with an exposed thermal pad that dissipates heat efficiently without a large external heatsink. The compact QFN footprint, combined with the integrated USB detection and boost converter, eliminates several discrete components and can reduce the battery management section of a wearable PCB to under 50 mm².
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”