Texas Instruments UCC3818 BiCMOS Power Factor Pregulator IC (16 Pin)The UCC3818 functions as an active power factor corrected pre regulator. The controller achieves a near unity power factor by shaping the AC input line current waveform to correspond to that of the AC input line voltage. Average current mode control maintains stable, low distortion sinusoidal line current. It is designed by Texas Instruments using the BiCMOS technology. The BiCMOS technology combines the strengths of two different process technologies

It is designed by Texas Instruments using the BiCMOS technology

The maximum average current this IC can handle is around  35A

These are Metal Film Resistor with a value of 27 ohm 1/4W and tolerance of ±1%

you can refer: A7860 Datasheet

Brown for these 9K3 resistors

Resistance Value 82 ohm Color Code Black

A3120 is an IGBT gate drive optocoupler with 2

Brown for these 1M resistors

Brown for these 10K resistors

These devices are available in dualˆ‚¬„¢inˆ‚¬„¢line

Up to 256 bytes  can be programmed at a time

High Voltage Rating: Operates at up to 1600V