SLVUBZ2A September   2020  – December 2020 LM5127-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Applications
    2. 1.2 Features
  3. 2EVM Setup
    1. 2.1 EVM Characteristics
  4. 3EVM Photo
  5. 4Testing Procedures
    1. 4.1 EVM Connectors and Test Points
  6. 5Test Results
    1. 5.1 Efficiency
    2. 5.2 Thermal Performance
    3. 5.3 Steady State
    4. 5.4 Load Transient
    5. 5.5 Line Transient Responses
  7. 6Schematics, PCB Layers, and Bill of Materials
    1. 6.1 Schematics
    2. 6.2 PCB Layers
    3. 6.3 Bill of Materials
  8. 7EVM Modifications
    1. 7.1 Configure Channel 1 as a Buck Controller
      1. 7.1.1 Component Modifications
      2. 7.1.2 CFG/MODE Pin Selection
    2. 7.2 Configure Channel 2 and Channel 3 as a Dual Phase Buck Controller
      1. 7.2.1 Component Modifications
      2. 7.2.2 CFG/MODE Pin Selection
    3. 7.3 EVM Modification Test Setups
  9. 8Revision History

7.1.1 Component Modifications

Table 7-1 indicates the components that must be changed from the default configuration to configure channel 1 as a buck controller. These changes result in channel 1 producing a 5 V output, capable of providing 5 A of output current.

Table 7-1 Modifications to Configure Channel 1 a Buck Controller
Component Action Comment
Feedback network configuration
R10 Do not populate
R16 Do not populate
R20 Do not populated
R15 Populate with 1 kΩ Configures VOUT1 to be 5 V
BMOUT configuration
R12 Populate with 100 kΩ
R22 Populate with 30.1 kΩ Sets BMIN_PRG to ~ 6.5 V
R13 Do not populate
R14 Populate with 20 kΩ
Compensation configuration
R27 4.99 kΩ Same component as R56
C26 10 nF Same component as C54
C24 220 pF Similar component as C53
Power-train component configuration
D1 Populate Similar component as D3
R1 5 mΩ Similar component as R47
L1 2.2 μH Same component as L2
C7, C8, C9, C10, C11 22 μF Similar component as C43
C1 Do not populate
C6 100 pF Similar component as C49