4.2 Test Equipment

Power Supply: The input voltage source (VIN) should be an adjustable power supply capable of 0 V to 42 V and source at least 10 A.

Electronic Loads: The E-Load should be capable of at least 20 V and 5 A.

Multi-meters:

• Voltmeter 1: Input voltage, connect from VIN to GND
• Voltmeter 2: Output voltage, connect from VOUT to GND
• Ammeter 1: Input current, must be able to handle 10 A. A shunt resistor can be used as needed.
• Ammeter 2: Output current, must be able to handle 3 A. A shunt resistor can be used as needed.

Oscilloscope: An oscilloscope and 10× probes with at least 20-MHz bandwidth is required. Measure the output voltage ripple directly across an output capacitor with a short ground lead. Do not use a long-lead ground connection due to the possibility of noise being coupled into the signal. To measure other waveforms, adjust the oscilloscope as needed.

Input and Output Cables: Cables capable of conducting 10 A current are recommended. Avoid the use of overly-long cables. Cable impedance, especially the inductances, may affect the circuit operation. To minimize the cable impedance effects, twist the pair of cables at both input and output ports.