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Texas Instruments LM34966EVM-FLY Controller Evaluation Module

Texas Instruments LM34966EVM-FLY Controller Evaluation Module (EVM) showcases the features and performance of the LM34966-Q1 as wide input non-synchronous flyback controller. The standard configuration is designed to provide a regulated output of 5V at 4A from an input of 18V to 36V, switching at 250kHz. The Texas Instruments LM34966EVM-FLY is designed for ease of configuration, enabling the user to evaluate many different applications on the same module. The PCB is two layers with components populated only on one side. Functionality includes programmable slope compensation, adjustable soft-start, programmable cycle-by-cycle current limit, hiccup mode short-circuit protection, and programmable line undervoltage lockout.

Features

18V to 36V input voltage range
Isolate output voltage 5V at 4A

Switching frequency 250kHz
Hiccup mode short circuit protection

Required Equipment

Power Supply
- The input voltage source (V_IN) should be a variable supply capable of 0V to 36V and source at least 5A
Multimeters
- Voltmeter 1
  - Input voltage, connect from V_IN to PGND
- Voltmeter 2
  - Output voltage, connect from V_OUT to ISO_GND
- Ammeter 1
  - For input current, must be able to handle 5A
  - Shunt resistor can be used as needed
- Ammeter 2
  - For output current, must be able to handle 5A
  - Shunt resistor can be used as needed

Electronic Load
- The load should be constant resistance (CR) or constant current (CC) capable
- It should safely handle 4A at 5V
Oscilloscope
- 20MHz bandwidth and AC coupling
- Measure the output voltage ripple directly across an output capacitor with a short ground lead
- It is not recommended to use a long-leaded ground connection due to the possibility of noise being coupled into the signal
- To measure other waveforms, adjust the oscilloscope as needed

Texas Instruments LM34966EVM-FLY Controller Evaluation Module

Features

Required Equipment

Test Setup

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