SLUUD80 December   2024 LM74681

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
  7. 2Hardware
    1. 2.1 Test Points and Connectors
    2. 2.2 Test Equipment and Setup
      1. 2.2.1 Power Supplies
      2. 2.2.2 Meters
      3. 2.2.3 Oscilloscope
      4. 2.2.4 Loads
    3. 2.3 Test Setup and Procedures
      1. 2.3.1 UVLO Functionality
      2. 2.3.2 Polarity Agnostic Startup
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1.     Trademarks

2.1 Test Points and Connectors

Table 2-1 lists the LM74681EVM evaluation board input and output connector functionality. Table 2-2 and Table 2-3 describe the test point availability and the jumper functionality.

Table 2-1 Input and Output Connector Functionality
Connector Label Description
J1 IN1 Power input connector to the positive rail of the input power supply.
J2 IN2 Power input connector to the negative rail of the input power supply.
J3 VOUT+ Power output connector to the positive side of the load.
J4 VOUT- Ground connection for the load.
Table 2-2 Test Points Description
Test PointsLabelDescription
TP1IN1Input power supply to the EVM.
TP2IN2Input power supply to the EVM.
TP3VOUT+Output from the EVM.
TP4PGNDGround connection for the load.
TP5ENEnable control (active high) of the controller.
TP6TG1GATE of the external top side MOSFET1.
TP7TG2GATE of the external top side MOSFET2.
TP8BG1GATE of the external bottom side MOSFET1
TP9BG2GATE of the external bottom side MOSFET2.
TP10VOUT-Connect to PGND.
Table 2-3 Jumper and LED Descriptions
JumperConnectionDescription
J51-2EN connected to GND. EN pulled high.
2-3EN connected to VOUT+. EN pulled high.
J61-2D4 LED indication when output high.