SLUUCK2A October   2022  – November 2022 BQ25620 , BQ25622

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 General Descriptions
  4. 2Testing Procedures
    1. 2.1 Equipment
    2. 2.2 Hardware Setup
    3. 2.3 Software Setup
    4. 2.4 Test Procedure
      1. 2.4.1 Initial Power Up
      2. 2.4.2 I2C Register Communication Verification
      3. 2.4.3 Charger Mode Verification
      4. 2.4.4 Boost Mode Verification
      5. 2.4.5 Helpful Tips
  5. 3PCB Layout Guideline
  6. 4Board Layout, Schematic, and Bill of Materials
    1. 4.1 Board Layout
    2. 4.2 Schematic
    3. 4.3 Bill of Materials
  7. 5Revision History

2.4.3 Charger Mode Verification

Use the following steps for charger mode verification:

  1. PS #1 should be on from Section 2.4.1. In the EVM software, click twice.
    • Verify that all Fault statuses read "Normal"
  2. To confirm SYS voltage regulation, enable Load #1 (see Section 2.2) and take DMM measurements as follows:
    • Measure → VSYS (SYS-TP14 and PGND-TP27 or TP28 or TP29) = 3.65V ±0.3V
    • Measure → VBAT (BAT-TP13 and PGND-TP27 or TP28 or TP29) = 2.5V ±0.2V
    • Measure → IBAT = 240mA ±50mA
  3. To confirm battery charge current regulation, change Load #1 to 3.7V and take DMM measurements as follows:
    • Measure → VSYS (SYS-TP14 and PGND-TP27 or TP28 or TP29) = 3.8V ±0.3V
    • Measure → VBAT (BAT-TP13 and PGND-TP27 or TP28 or TP29) = 3.7V ±0.2V
    • Measure → IBAT = 480mA ±100mA
  4. To confirm input current limit operation, in the EVM software on the 16-bit tab, set fast charge current to 1040mA and then take DMM measurement ( or PS #1 measurement if accurate) as follows:
    • Measure → IIN = 500mA ±200mA