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Texas Instruments LM5156EVM-BST Controller Evaluation Module (EVM)

Texas Instruments LM5156EVM-BST Controller Evaluation Module (EVM) showcases the features and performance of the LM5156. The LM5156 is a wide-input, non-synchronous boost controller. The standard configuration is designed to provide a regulated output of 12V at 3A from an input of 3V to 12V, switching at 440kHz. This Texas Instruments LM5156EVM-BST evaluation module is designed for ease of configuration, enabling a user to evaluate many different applications on the same module. Functionality includes external clock synchronization, enabling of spread spectrum oscillator dithering, programmable slope compensation, adjustable soft-start, programmable cycle-by-cycle current limit, and output over-voltage protection.

Features

  • 3V to 12V input voltage range
  • 12V at 3A output voltage
  • 440kHz switching frequency
  • Internal spread-spectrum operation

Required Equipment

  • Power supply with an input voltage source (VIN) should be a variable supply capable of 0V to 20V and source at least 15A
  • Multi-meters
    • Voltmeter 1: Input voltage, connect from VIN to VIN-
    • Voltmeter 2: Output voltage, connect from VOUT to GND
    • Ammeter 1: Input current, must be able to handle 15A (Shunt resistor can be used as needed)
    • Ammeter 2: Output current, must be able to handle 3A (Shunt resistor can be used as needed)
  • The electronic load should be constant resistance (CR) or constant current (CC) capable and should safely handle 3A at 12V
  • Oscilloscope with 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

Test Setup

Mechanical Drawing - Texas Instruments LM5156EVM-BST Controller Evaluation Module (EVM)

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Texas Instruments LM5156EVM-BST Controller Evaluation Module (EVM)