SLUUC51E June   2020  – October 2026

 

  1.   1
  2. 1Description
  3. 2Features
  4.   4
  5. 3Evaluation Module Overview
    1. 3.1 Introduction
    2. 3.2 Kit Contents
    3. 3.3 Specifications
    4. 3.4 Device Information
    5.     10
  6. 4Hardware
    1. 4.1 I/O Information
    2. 4.2 Jumper Information
  7. 5Test Setup and Results
    1. 5.1 Equipment
    2. 5.2 Equipment Setup
    3. 5.3 Software Setup
      1. 5.3.1 BQSTUDIO using EV2400
      2. 5.3.2 TI Charger GUI for USB2ANY
    4. 5.4 Test Procedure
      1. 5.4.1 Initial Settings
      2. 5.4.2 Communication Verification
      3. 5.4.3 Charge Mode Verification
      4. 5.4.4 OTG Mode Verification
  8. 6PCB Layout Guidelines
  9. 7Hardware Design Files
    1. 7.1 Schematics
    2. 7.2 Board Layout
    3. 7.3 Bill of Materials
  10.   Trademarks
  11. 8Revision History

3.1 Introduction

The BQ25790 is an integrated switched-mode buck-boost battery charge management device in WCSP package, intended for 1- to 4-series cell Li-ion and Li-polymer batteries. The charger features a narrow VDC architecture (NVDC) which allows the system to be regulated to a minimum value even if the battery is completely discharged. Additionally, the BQ25790 supports input source detection through D+ and D- which is compatible with USB2.0, USB3.0 power delivery, non-standard adapters and many high voltage adapters. With dual input source selection, USB OTG support and an integrated 16-bit multi-channel analog-to-digital converter (ADC), the BQ25790 is a complete charging option.

Features of the IC include:

  • Synchronous Switch Mode Buck-Boost Charger for 1s-4s Battery Configuration for 5A Charging with 10mA Resolution
  • Support for 3.6V to 24V Wide Range of Input Sources USB Auto-Detect, USB PD and Wireless Input
  • Dual Input Source Selector to Drive Bi-Directional Blocking NFETs
  • Power up USB Port from Battery (USB OTG) with 2.8V to 22V OTG Output Voltage with 10mV Resolution
  • Low Battery Quiescent Current < 1µA in Shutdown Mode

Throughout this user's guide, the abbreviations EVM, BQ25790EVM, BMS027 PCB and the term evaluation module are synonymous, unless otherwise noted.