BQ25887 Battery Charger with Cell Balancing

Texas Instruments' 2 A boost switch-mode battery charge management devices are ideal for portable devices

Image of Texas Instruments' BQ25887 Battery Charger With Cell BalancingTexas Instruments' BQ25887 is a highly-integrated 2 A boost switch-mode battery charge management device for 2-cell (2s) Li-Ion and Li-polymer batteries. The BQ25887 has I2C control with cell balancing, no OTG, and no power-path.

Features
  • High-efficiency 2 A, 1.5 MHz switch-mode boost charger:
    • 93.4% charge efficiency at 5 V adapter, 7.6 V battery, and 1 A charge
    • Optimized for USB input and 2s Li-Ion batteries
    • Selectable low-power PFM mode for light-load operations
  • 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 and USB3.0 standard adapters
    • Max 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 a default register setting
  • Input current optimizer (ICO) to maximize input power without overloading the 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:
    • Charge voltage regulation: ±0.5%
    • Charge current regulation: ±5%
    • Input current regulation: ±7.5%
  • Safety:
    • Battery temperature sensing in charge
    • Thermal regulation and thermal shutdown
Applications
  • E-cigarettes
  • Drone payload controls

BQ25887 Battery Chargers with Cell Balancing

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
PWR MGMT BATTERY MGMTBQ25887RGERPWR MGMT BATTERY MGMT3000 - Immediate
10001 - Factory Stock
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PWR MGMT BATTERY MGMTBQ25887RGETPWR MGMT BATTERY MGMT250 - Immediate
750 - Factory Stock
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Evaluation Boards

ImageManufacturer Part NumberDescriptionTypeFunctionEmbeddedAvailable QuantityView Details
EVAL MODULE INTERFACE BOARDEV2400EVAL MODULE INTERFACE BOARDInterfaceUSB 2.0 to SMBus BridgeYes, MCU, 16-Bit97 - Immediate
1759 - Factory Stock
View Details
DEVELOPMENT POWER MANAGEMENTBQ25887EVMDEVELOPMENT POWER MANAGEMENTPower ManagementBattery Charger-5 - Immediate
60 - Factory Stock
View Details
Published: 2019-07-11