SNVU918 October   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Additional Images
    2. 2.2 Power Requirements
    3. 2.3 Setup and Operation
  7. 3Implementation Results
    1. 3.1 Evaluation Setup
    2. 3.2 Performance Data and Results
  8. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  9. 5Additional Information
    1. 5.1 Trademarks

3.2 Performance Data and Results

Unless otherwise specified the following condition apply: TA = 25ºC, VIN = 24V, 400kHz.

LM68645EVM Efficiency

VOUT = 5V 400kHz, Auto Mode

Figure 3-1 Efficiency
LM68645EVM Typical Switching Waveform in PWM
IOUT = 4.5AVIN = 24VVOUT = 5V
Figure 3-3 Typical Switching Waveform in PWM
LM68645EVM Load Transient (FPWM)
IOUT = 0A to 4.5A (1μs)VIN = 24VFPWM ModeVOUT = 5V
Figure 3-5 Load Transient (FPWM)
LM68645EVM Line and Load Regulation

VOUT = 5V 400kHz, Auto Mode

Figure 3-2 Line and Load Regulation
LM68645EVM Typical Switching Waveform in PFM
IOUT = 40mAVIN = 24VVOUT = 5V
Figure 3-4 Typical Switching Waveform in PFM
LM68645EVM Load Transient (AUTO)
IOUT = 0A to 4.5A (1μs)VIN = 24VAuto ModeVOUT = 5V
Figure 3-6 Load Transient (AUTO)
LM68645EVM Start-Up
IOUT = 40mAVIN = 24VAuto ModeVOUT = 5V
Figure 3-7 Start-Up
LM68645EVM Short Circuit
IOUT = 1AVIN = 24VVOUT = 5V
Figure 3-9 Short Circuit
LM68645EVM Start-Up
IOUT = 4.5AVIN = 24VAuto ModeVOUT = 5V
Figure 3-8 Start-Up
LM68645EVM Thermal Image
IOUT = 4.5A 400kHz VIN = 24V VOUT = 5V
LM68645EVM
Figure 3-10 Thermal Image