SNVU948 July   2025 LM51770

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Connector, Test Point, and Selection Switch Descriptions
      1. 2.1.1 Connector Descriptions
      2. 2.1.2 Jumper Descriptions
      3. 2.1.3 Test Point Descriptions
      4. 2.1.4 Selection Switch Descriptions
        1. 2.1.4.1 S1 and S2 CFG Setting
      5. 2.1.5 Current Monitor and Current Limiter Configuration
        1. 2.1.5.1 Current Monitor Configuration
        2. 2.1.5.2 Current Limiter Configuration
  9. 3Implementation Results
    1. 3.1 Test Setup and Procedure
      1. 3.1.1 Test Setup
      2. 3.1.2 Test Procedure
      3. 3.1.3 Precautions
    2. 3.2 Test Data and Performance Curves
      1. 3.2.1 Thermal Performance
      2. 3.2.2 Efficiency
      3. 3.2.3 Steady State Waveforms
      4. 3.2.4 Step Load Response
      5. 3.2.5 AC Loop Response Curve
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

S1 and S2 CFG Setting

These switches enable to set the resistor for the CFG pin. Find details in the LM51770 data sheet.

Table 2-4 CFG Pin Configuration Overview
#(1)

DRSS

SCP - Hiccup Mode

Current Limit

PSM Entry Threshold

1DISABLEDDISABLEDDISABLED

10%

2ENABLED
3DISABLEDENABLED
4ENABLED
5DISABLEDDISABLEDENABLED
6ENABLED
7DISABLEDENABLED
8ENABLED
9DISABLEDDISABLEDDISABLED

15%

10ENABLED
11DISABLEDENABLED
12ENABLED
13DISABLEDDISABLEDENABLED
14ENABLED
15DISABLEDENABLED
16ENABLED
Only close one switch.