Figure 4 shows an assembled zener-diode-tester circuit. The zener diode under test is On Semiconductor ‘s BZX55C15RL, which has a working voltage of 13.8 to 15.6V. The voltage in Figure 4was measured ...

Diode D1 and capacitor C3 forms the output rectifier and filter circuit. If possible, try to replace D1 with a UF4001 fast diode for better efficiency. Zener diode D2 sets the output voltage to near ...

Circuit Modifications to Reduce Ringing and EMI The circuit in Figure 2 shows the power-stage components for a synchronous buck converter.