SNOU180A June   2021  – September 2021 LM74701-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Setup
    1. 2.1 I/O Connector Description
    2. 2.2 Board Setup
    3. 2.3 Schematic
  4. 3LM74701-Q1EVM Performance Capture
    1. 3.1 LM74701-Q1EVM Startup
    2. 3.2 Startup Reverse Polarity (–12 V)
    3. 3.3 ISO 7637-2 Pulse 1 Performance
  5. 4EVM Board Assembly Drawings and Layout Guidelines
    1. 4.1 PCB Drawings
    2. 4.2 Bill of Materials
  6. 5Revision History

2.2 Board Setup

  • Before applying power to the LM74701-Q1EVM, verify all external connections.
  • Turn off external power supplies and connect them with the proper polarity to the VIN and GND1 connectors.
  • An electronic or resistive load must be connected at the output VOUT and GND2 connectors.
  • The tests outlined in this document are conducted with 3-A constant current as the load and 12 V at the input.
  • Make sure that the external power-supply source for the input voltage is capable of providing enough current to the output load so that the output voltage can be obtained.

When all connections to the LM74701-Q1EVM are verified, apply power to VIN. Figure 2-2 captures EVM board setup.

GUID-20210831-SS0I-9S2B-6LCW-CDKGMKVNCR2G-low.pngFigure 2-2 LM74701-Q1EVM