I am using LYT4228 IC for my 50 Watt (72V 620mA) Driver. Input Voltage is 220VAC 50Hz.
Many drivers already installed and all are working well with better efficiency. There is no issue with performance and stability except one issue.
When I try to flicker the input voltage (Quickly on/off power by switch), some time watt goes to 63Watt.
I have checked many drivers by giving them flicker. Many of them goes to 63Watt and stay on that power. Driver goes to normal wattage after off/on the power.
I have tested the driver in much worst conduction. But no other issue in driver.
Driver details are shown below.
Input Voltage: 220 VAC 50Hz
Output Voltage: 72V 620mA
IC: LYT4228 (Reduced Mode using 47uF X7R Bias Capacitor)
Transformer : PQ2620