SNVU888 March   2024

 

  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 Setup
    2. 2.2 Jumper Information
    3. 2.3 Power Supply
  9. 3Software
    1. 3.1 Software Description
    2. 3.2 GUI Installation
    3. 3.3 Graphical User Interface (GUI) Guidance
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks

2.3 Power Supply

The EVM can be powered by USB2ANY directly when J19 is connected to 3V3_U2A. If the input current needs to be measured, then an external VIN/VCC supply is recommended during evaluation.

  1. Connect the USB2ANY to the LP5811-10EVM using the ribbon cable.
  2. Connect a 1.8-5.5V external power supply to the VCC_EXT terminal (TP4) and connect the switching jumper (J19) to VCC_EXT.
  3. If the user wants to evaluate LP5811 but disable the boost function, then provide power supply from Vout instead of VIN and connect the EN_B/D (J35/J21) to L.
  4. Plug the USB cable into the USB port on the computer.

See the external power supply connection in Figure 2-3.

GUID-20240218-SS0I-PGCS-RDH1-T2ZT2QWZZWBT-low.svgFigure 2-3 External Power Supply