TIDUDG1 July   2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 MIL-STD-1275E versus MIL-STD-1275D
      2. 2.2.2 Reverse Polarity Event
      3. 2.2.3 Voltage Spike Event
      4. 2.2.4 Voltage Spike Event: Component Selection
      5. 2.2.5 Voltage Surge Event
      6. 2.2.6 Voltage Surge Event: Component Selection
    3. 2.3 Highlighted Products
      1. 2.3.1 LM7480-Q1
      2. 2.3.2 LM5069
  8. 3Hardware, Testing Requirements and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks

2.2.3 Voltage Spike Event

In the MIL-STD-1275E documentation, the injected voltage spikes section describes two different voltage spike events that can occur during vehicle operation: injected spikes and emitted spikes.

Injected voltage spikes are the higher energy spikes that can occur on the 28-V bus. The voltage spike is ±250 V while having a energy content of 2 Joules. The injected voltage spike event occurs when high-power systems in the vehicle, turn on in the system.

Emitted voltage spikes, conversely, are much lower energy spikes that occur on the 28-V bus. The maximum total energy in a single spike is 125 mJ. These events occur when other low-power accessories are toggled on an off on the bus line.