SNVU869 august   2023 LM5185-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 Setup
    2. 2.2 Header Information
    3. 2.3 Test Points
    4. 2.4 Assembly Instructions
    5. 2.5 Best Practices
  9. 3Implementation Results
    1. 3.1 Performance Data and Results
      1. 3.1.1 Conversion Efficiency
      2. 3.1.2 Output Voltage Regulation
      3. 3.1.3 Operating Waveforms
        1. 3.1.3.1 Start-up
        2. 3.1.3.2 Load Transient Response
        3. 3.1.3.3 Switching
    2. 3.2 Thermal Performance
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials (BOM)
  11. 5Compliance Information
    1. 5.1 Compliance and Certifications
  12. 6Additional Information
    1. 6.1 Trademarks

1.3 Specification

Figure 2-1 shows the simplified schematic of the LM5185EVM-SIO circuit board. Table 2-2 shows the specifications of the EVM in the factory default settings.

GUID-20230713-SS0I-2PBG-6ZKF-L5XZGDGSL9MC-low.svg Figure 1-1 LM5185 PSR Flyback Converter Simplified Schematic
Table 1-2 Electrical Performance Characteristics
PARAMETER TEST CONDITION MIN TYP MAX UNIT
INPUT CHARACTERISTICS
Input voltage range, VIN 20 60 V
Input voltage turn on, VIN_ON Adjustable using EN/UVLO divider resistors 19
Input voltage turnoff, VIN_OFF 18
Input current, operating with no load, IIN_NL IOUT = 0 A VIN = 20 V 5.57 mA
VIN = 60 V 3.32
Input current, disabled, IIN_OFF, excluding the external UVLO resistor leak current VEN = 0 V, removing R6 VIN = 20 V 5.0 µA
VIN = 40 V 10.0
VIN = 60 V 20.0
OUTPUT CHACTERISTICS
Output voltage, VOUT 16.154 16.400 16.646 V
Max output current, IOUT VIN = 20 V 1.0 A
VIN = 40 V 1.5 A
VIN = 60 V 1.8 A
Soft-start time, tSS IOUT = 1 A 25 ms
SYSTEM CHARACTERISTICS
Switching Frequency VIN = 48 V, IOUT = 0.5 A 350 kHz
Half-load efficiency, ηHALF IOUT = 0.5A VIN = 20 V 90.2
VIN = 40 V 84.3
VIN = 60 V 82.0
Full load efficiency, ηFULL IOUT = 1.0A VIN = 20 V 90.5
VIN = 40 V 89.9
VIN = 60 V 86.9
Isolation rating(3) RMS voltage 1500 V
LM5180 junction temperature, TJ -40 150 °C