Boosting battery chargers with cell balancing evaluation module


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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 settings makes the device a truly flexible solution. OTG buck operation allows enables the input port to supply power from battery.

  • 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 limit
  • Onboard test points, sense resistors, and jumpers facilitate measurement of high-efficiency- and high accuracy voltage and current regulation
Battery charger ICs
BQ25883 I2C 2 cell 2A Boost battery charger for USB input in a WQFN package with Power Path BQ25887 I2C 2 cell 2A Boost battery charger for USB input and integrated cell balancing

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Evaluation board

BQ25887EVM — BQ25887 Boosting battery chargers with cell balancing evaluation module

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Technical documentation

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Type Title Date
* User guide BQ25887 QFN boost-mode battery charger evaluation module 05 Feb 2019
Data sheet BQ25887 I2C Controlled 2-Cell, 2-A Boost-Mode Battery Charger With Cell Balancing For USB Input datasheet (Rev. B) PDF | HTML 03 Nov 2019
Certificate BQ25887EVM EU Declaration of Conformity (DoC) 02 Jan 2019

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