: If the chip isn't starting, look for high-value resistors (e.g., 100kΩ to 1MΩ) that provide initial power to the VCC pin.
:
Working with the involves lethal voltages . Even when unplugged, the main filter capacitor can hold a 300V+ charge for several minutes. Always discharge the main capacitor with a high-wattage resistor before touching the underside of the PCB. lac503p schematic
: It acts as a PWM controller or a power switch regulator. : If the chip isn't starting, look for
A typical schematic utilizing the LAC503P can be broken down into four distinct sections. : If the chip isn't starting
COMP (Pin6)---[RC snubber]---GND