SLVUBX4A November   2020  – February 2022 LP8764-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Getting Started
    1. 2.1 Getting Started: Single EVM
    2. 2.2 Getting Started: Multiple EVM Evaluation
    3. 2.3 GUI Tool
  4. 3EVM Details
    1. 3.1 Terminal Blocks
    2. 3.2 Test Point Descriptions
    3. 3.3 Configuration Headers
    4. 3.4 Stack-up Headers
    5. 3.5 Connectors
    6. 3.6 Dip Switches
    7. 3.7 EVM Control and GPIO
  5. 4Customization
    1. 4.1 Changing the Communication Interface
    2. 4.2 Changing the Phase Configuration
  6. 5Schematic, Layout, and Bill of Materials
  7. 6Additional Resources
  8. 7Revision History

4.2 Changing the Phase Configuration

There are five possible phase configurations as shown in Table 4-1. It is important that the phase configuration of the EVM matches the phase configuration of the PMIC. Jumpers J3-J8 are located on the top side of the PCB whereas the resistors R1-R7 are on the bottom side of the PCB.

Table 4-1 Phase configurations
Phase configuration R1 R2/R3 R4/R5 R6/R7 J3 J4 J5 J6 J7 J8
1 (4-phase) R1 R2 R5 R6 Y Y Y Y Y Y
2 (3+1) R1 R2 R5 R7 Y Y Y Y N N
3 (2+1+1) R1 R2 R4 R7 N N Y N N N
4 (1+1+1+1) R1 R3 R4 R7 N N N N N N
5 (2+2) R1 R2 R4 R6 N N Y N N Y

This table is also printed on the EVM on the bottom side of the PCB. All the feedback voltages can be measured from J14-J19 where J15 and J18 are differential feedbacks.

Note: it is possible to use unused secondary buck's feedbacks for voltage monitoring. 0ohm resistor connecting the FB pin to GND must be opened in this case (e.g. R5/R6).