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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 V_IN 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: V_O1 = 10V ±1%
Three cross-regulated, isolated output voltages
- V_O2 = 20V
- V_O3 = 20V
- V_O4 = 20V
The total rated load of 8.5W
- 250mA at V_O1
- 75mA at V_O2
- 75mA at V_O3
- 150mA at V_O4

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 V_O1, connect from TP18 (+) to TP19 (–)
- Voltmeter 2: Isolated 20V output voltage V_O2, connect from TP3 (+) to TP5 (–)
- Voltmeter 3: Isolated 20V output voltage V_O3, connect from TP6 (+) to TP8 (–)
- Voltmeter 4: Isolated 20V output voltage V_O4, connect from TP12 (+) to TP13 (–)
- Voltmeter 5: Input voltage V_I, connect from TP2 (+) to TP7 (–)
- Ammeter 1: V_O1 main output current, must be able to handle 1A
- Ammeter 2: V_O2 output current, must be able to handle 0.5A
- Ammeter 3: V_O3 output current, must be able to handle 0.5A
- Ammeter 4: V_O4 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

Texas Instruments LM5158EVM-FLY Converter Evaluation Module

Features

Required Equipment

Test Setup

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