BQ25887 Texas instruments

BQ25887

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BQ25887

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Описание

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.

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

Number of series cells	2
Charge current (max) (A)	2
Vin (max) (V)	6.2
Cell chemistry	Li-Ion/Li-Polymer
Battery charge voltage (min) (V)	6.8
Battery charge voltage (max) (V)	9.2
Absolute max Vin (max) (V)	20
Control topology	Switch-Mode Boost
Control interface	I2C
Features	BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, ICO (Input Current Optimization), Input OVP, Integrated ADC, VINDPM (Input voltage threshold to maximize adaptor power)
Vin (min) (V)	3.9
Rating	Catalog
Operating temperature range (°C)	-40 to 85