I2C 2 cell 2A Boost battery charger for USB input and integrated cell balancing
Product details
Parameters
Package | Pins | Size
Features
- High-efficiency 2-A, 1.5-MHz switch mode boost charger
- 93.4% Charge efficiency at 5-V adapter, 7.6-V battery, 1-A charge
- Optimized for USB input and 2-cell Li-Ion battery
- Selectable low power PFM mode for light load operation
- Single input to support USB input adapters
- Supports 3.9-V to 6.2-V input voltage range with 20-V absolute maximum input voltage rating
- Input current limit (500 mA to 3.3 A with 100-mA resolution) to support USB2.0, USB3.0 standard adapters
- Maximum power tracking by input voltage limit up-to 5.5 V
- Cell balancing and I2C control
- Integrated FETs for balancing current up to 400 mA
- Automatic cell balancing with default register setting
- Input current optimizer (ICO) to maximize input power without overloading adapters
- Integrated 16-bit ADC for system monitoring (BUS voltage and current, each cell voltage, charge current, and NTC and die temperature)
- High integration includes all MOSFETs, current sensing and loop compensation
- High accuracy
- ±0.5% Charge voltage regulation
- ±5% Charge current regulation
- ±7.5% Input current regulation
- Safety
- Battery temperature sensing in charge
- Thermal regulation and thermal shutdown
Description
The BQ25887 is a highly-integrated 2-A boost switch-mode battery charge management device for 2-cell (2s) Li-Ion and Li-polymer battery. The BQ25887 has I2C control with cell balancing for USB input.
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Technical documentation
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View all 7 | Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | BQ25887 I2C Controlled 2-Cell, 2-A Boost-Mode Battery Charger With Cell Balancing For USB Input datasheet (Rev. B) | Nov. 03, 2019 |
| Technical article | When to use rechargeable batteries in small battery applications | Oct. 01, 2019 | |
| Technical article | 4 Reasons why you should use a boost charger for 2-cell battery application | Apr. 03, 2019 | |
| Application note | USB charging solution for 2-cell (2S) discrete using BQ25887 with cell-balancing | Mar. 28, 2019 | |
| User guide | BQ25887 QFN boost-mode battery charger evaluation module | Feb. 05, 2019 | |
| Technical article | Should I use a linear charger or a switching charger? | Oct. 31, 2015 | |
| Technical article | Summertime and the livin' is easy | Jun. 20, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Charging 2-cell, 8.4-V battery from a legacy 5-V USB port requires a boost charger. The BQ25887 is a highly integrated 2-A boosting, 1.5-MHz switch-mode battery charge management with cell balancing for 2-s Li-ion and Li-polymer battery. The I2C serial interface with charging and cell balancing (...)
Features
- Easily evaluate the high-efficiency 2-A, 1.5-MHz integrated field-effect-transistor (FET), switch-mode
- Cell balancing feature to safely charge two discrete cells in series
- Onboard USB input adapter for connecting to USB source and communication using the PSEL function to set default input current (...)
Description
The EV2400 EVM interface board enables an IBM-compatible or other type PC (with the required driver for its particular platform) to communicate with the Texas Instruments SMBus or I2C interface gas gauges via a Universal Serial Bus (USB) port. In addition to this board, PC software is required to (...)
Features
- Fully powered from the USB port
- Optional 5-V port for powering high power voltage drivers (future upgrade)
- Complete interface between the USB and SMBus, I2C (8/16) interfaces
- Expansion port for future upgrades
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| VQFN (RGE) | 24 | View options |
Ordering & quality
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