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

3.2 Startup Reverse Polarity (–12 V)

  • A –12-V source is connected to the VIN input of the LM74701-Q1EVM.
  • Figure 3-2 shows that the output voltage remains at a constant 0 V in this situation.
  • This test simulates the event of connecting a 12-V battery in the reverse direction; therefore, protecting the load from negative input voltages.
GUID-20210601-CA0I-X2GG-PH1P-VWFTTVWLRN94-low.png Figure 3-2 Startup Reverse Polarity (–12 V)