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Texas Instruments bq25887 I2C Controlled Boost-Mode Battery Charger

Texas Instruments bq25887 I2C Controlled Boost-Mode Battery Charger is a highly integrated 2A 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 but no OTG or power path. The bq25887 has a cell-balancing function that charges 2S battery cells from a 5V USB adapter. Unlike traditional pack-side cell balancing, an integrated cell balancing function enables the Texas Instruments bq25887 to balance the voltage of the two cells during charging within one charge cycle.

Features

  • High-efficiency 2A, 1.5MHz switch-mode boost charger
    • 93.4% Charge efficiency at 5V adapter, 7.6V battery, 1A charge
    • Optimized for USB input and 2-cell Li-Ion battery
    • Selectable low-power PFM mode for a light load operation
  • Single input to support USB input adapters
    • Supports 3.9V to 6.2V input voltage range with a 20V absolute maximum input voltage rating
    • Input current limit (500mA to 3.3A with 100mA resolution) to support USB2.0, USB3.0 standard adapters
    • Maximum power tracking by input voltage limit up to 5.5V
  • Cell balancing and I2C control
    • Integrated FETs for balancing current up to 400mA
    • Automatic cell balancing with a 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

Applications

  • E-Cigarette
  • Drone payload control

Simplified Schematic

Schematic - Texas Instruments bq25887 I2C Controlled Boost-Mode Battery Charger

Related Development Tool

Texas Instruments bq25887EVM Charger Evaluation Module (EVM)

For evaluating the bq25887, an I2C controlled, 2s battery NVDC charger in the QFN package.

Learn Moreacerca de Texas Instruments bq25887EVM Charger Evaluation Module (EVM) View Productsrelacionado con Texas Instruments bq25887EVM Charger Evaluation Module (EVM)
Publicado: 2019-06-12 | Actualizado: 2023-09-26