SLUUC51D june   2020  – july 2023 BQ25790

 

  1.   1
  2.   BQ25790EVM (BMS027) Evaluation Module User's Guide
  3.   Trademarks
  4.   4
  5. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 I/O Descriptions
    3. 1.3 Recommended Operating Conditions
  6. 2Test Setup and Results
    1. 2.1 Equipment
    2. 2.2 Equipment Setup
    3. 2.3 Software Setup
      1. 2.3.1 BQSTUDIO using EV2400
      2. 2.3.2 TI Charger GUI for USB2ANY
    4. 2.4 Test Procedure
      1. 2.4.1 Initial Settings
      2. 2.4.2 Communication Verification
      3. 2.4.3 Charge Mode Verification
      4. 2.4.4 OTG Mode Verification
  7. 3PCB Layout Guidelines
  8. 4Board Layout, Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Board Layout
    3. 4.3 Bill of Materials
  9. 5Revision History

2.2 Equipment Setup

Use the following list to set up the EVM testing equipment. Refer to Figure 2-1 for the test setup connections to the EVM:

  1. Review the EVM connections in Table 1-2.
  2. Set PS#1 for 5.0-V, 3-A current limit and then turn off the supply. Connect PS#1 to J1 (VIN1 and PGND).
  3. Connect a voltage meter across TP21 (VBUS) and TP47 (PGND) to measure the input voltage as seen from the VBUS pins of the charger.
  4. Connect a voltage meter across TP1 and TP2 (I_VAC1_SENSE) to measure the input current into the VBUS pins through the VIN1 path. Alternatively, you may connect a current meter between PS1 and J1.
  5. Set Load #1 to constant voltage mode, capable of sinking (for example, compliance) at least 3 A, and output to 5.0 V, and then disable load. Connect Load #1 to J5 (BATTERY and PGND).
  6. Connect a voltage meter across TP27 (BAT) and TP46 (PGND) to measure the battery voltage as seen from the BAT pins of the charger.
  7. Connect a voltage meter across TP17 and TP18 (I_BAT_SENSE) to measure the battery charge current out of and discharge current into BAT pins. Alternatively, you may connect a current meter between Load #1 and J5.
  8. Connect a voltage meter across TP26 (SYS) and TP48 (PGND) to measure the system voltage as seen from the SYS pins of the charger.
  9. Install shunts as shown in Table 1-3.

GUID-BD2B2A3C-AC77-4989-83E0-AAD2CC2296FA-low.gif Figure 2-1 Equipment Test Setup for BMS027A