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Texas Instruments LM5158EVM-FLY Converter Evaluation Module

Texas Instruments LM5158EVM-FLY Converter Evaluation Module (EVM) showcases the features and performance of the LM5158. The LM5158 is a 2.2MHz wide VIN boost, flyback, and SEPIC converter with a dual random spread spectrum. This evaluation module uses the LM5158 as a flyback converter to produce multiple output voltage rails for typical applications of the 3-phase inverter gate driver bias supplies. The standard configuration for Texas Instruments LM5158EVM-FLY is designed to provide a regulated output of 10V at 250mA from an input of 8V to 16V. It also provides three isolated 20V rails at 75mA, 75mA, and 150mA, respectively. The switching frequency is at 250kHz.

Features

  • Tightly regulated main output voltage: VO1 = 10V ±1%
  • Three cross-regulated, isolated output voltages
    • VO2 = 20V
    • VO3 = 20V
    • VO4 = 20V
  • The total rated load of 8.5W
    • 250mA at VO1
    • 75mA at VO2
    • 75mA at VO3
    • 150mA at VO4
  • Peak efficiency > 90%
  • Optional hiccup mode overloading protection
  • 250kHz switching frequency
  • 2-layer PCB, 3.5 in × 2.3 in

Required Equipment

  • Power Supply
    • Use an input voltage source that is a variable supply capable of 0V to 16V and sources at least 5A
  • Multimeters
    • Voltmeter 1: Non-isolated 10V main output voltage VO1, connect from TP18 (+) to TP19 (–)
    • Voltmeter 2: Isolated 20V output voltage VO2, connect from TP3 (+) to TP5 (–)
    • Voltmeter 3: Isolated 20V output voltage VO3, connect from TP6 (+) to TP8 (–)
    • Voltmeter 4: Isolated 20V output voltage VO4, connect from TP12 (+) to TP13 (–)
    • Voltmeter 5: Input voltage VI, connect from TP2 (+) to TP7 (–)
    • Ammeter 1: VO1 main output current, must be able to handle 1A
    • Ammeter 2: VO2 output current, must be able to handle 0.5A
    • Ammeter 3: VO3 output current, must be able to handle 0.5A
    • Ammeter 4: VO4 output current, must be able to handle 0.5A
    • Ammeter 5: Input current, must be able to handle 3A
  • Loads
    • Electronic loads, pure resistive loads, or a combination of both can be used at the four outputs
    • An electronic load can be used for each output rail
    • The electronic load should be constant resistance (CR) or constant current (CC) capable
    • It should safely handle 0.5A at 20V
    • A resistive load can also be used
    • Limit the minimum resistance for each output, which corresponds to the maximum power, with the following
      • Load 1: 40Ω or 250mA
      • Load 2: 266.7Ω or 75mA
      • Load 3: 266.7Ω or 75mA
      • Load 4: 133.3Ω or 150mA

Test Setup

Mechanical Drawing - Texas Instruments LM5158EVM-FLY Converter Evaluation Module
Published: 2021-10-13 | Updated: 2022-03-11