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

7.2.1 Component Modifications

Table 7-3 indicates the components that must be changed from the default configuration to configure channel 2 and channel 3 as a dual phase buck controller. These changes result in channel 2 and channel 3 producing a 3.3 V output, capable of providing 14 A of output current.

Table 7-3 Modifications to Configure Channel 2 and Channel 3 as Dual Phase Buck Controller
Component Action Comment
Feedback network configuration
R46 Do not populate
R55 Populate with 1 kΩ Configures output voltage to be 3.3 V
R68 0 Ω Short FB3 to ground
Compensation configuration
R69 Do not populate
C75 Do not populate
C73 Do not populate
Soft-Start configuration
C76 Do not populate
J20 Open J18 can be used to enable diode emulation mode
Powertrain component configuration
R58 Short with 0 Ω resistor Connects the output of channel 2 and channel