SLVUDD8 September   2025 LM50 , LM50-Q1

 

  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 Overview
    2. 2.2 Perforations
    3. 2.3 Status LEDs and Subregulator
    4. 2.4 Programming Header
    5. 2.5 Pushbutton Switch
    6. 2.6 RC Filter
  9. 3Software
    1. 3.1 Software Download
      1. 3.1.1 Online Software
      2. 3.1.2 Offline Software
    2. 3.2 Home Tab
    3. 3.3 Data Capture Tab
    4. 3.4 Collateral Tab
  10. 4Hardware Design Files
    1. 4.1 LM50HVEVM Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Related Documentation

2.3 Status LEDs and Subregulator

The LM50HVEVM includes LEDs to indicate board status; the green LED D2 illuminates when VDUT is powered up correctly. D2 illuminates whether VDUT is supplied by the 3.3V from U7 or from an external voltage source. U7 is the onboard regulator which supplies the 3.3V net, and is enabled and disabled by switch SW2. For normal operation of the EVM with no external connections, SW2 must be set to the 3.3V net. By default, SW2 is set at a neutral middle position where the LM50HV is unpowered. To power the LM50HV, SW2 must be moved to either position to connect to the 3.3V net or an external power source.

The red LED D6 is the MSP430F5528 status LED. Table 2-1 shows what the different modes of operation mean.

Table 2-1 D6 LED Status
D6 LED STATUSMEANING
OffEVM is connected to EVM GUI
Blinking in 4 blink burstEVM is plugged into PC, not connected to EVM GUI
Steady blinkingConnected to USB power