PT4115

8 лет назад

The video explores a low-voltage LED lamp with a buck regulator. The lamp is available in various wattages and voltage ranges, and the video focuses on the 5-watt model. The video examines the lamp's internal circuitry, including the buck regulator chip, inductor, and bridge rectifier, and tests its power consumption.

3 года назад

This video explains how a PT4554D LED driver circuit works. The circuit uses a bridge rectifier, a capacitor, and a coil to regulate the voltage supplied to the LED panel. The video demonstrates how the circuit compensates for variations in line voltage by adjusting the switching frequency of the PT4554D IC.