The TT8486A/TT6061A is a CMOS technology IC designed for 3-step touch dimmer control. It provides OFF, NIGHT, MEDIUM, and HIGH lighting levels with specified triac turn-on times for both 110V/60Hz and 220V/50Hz AC inputs. The block diagram includes a frequency generator, zero-crossing detector, touch step detector, counter, decoder, trigger buffer, and register.
At 110V/60Hz, the TRIAC turn-on times are 5.9±0.4ms for NIGHT, 4.0±0.3ms for MEDIUM, and 1.0±0.2ms for HIGH.
At 220V/50Hz, the TRIAC turn-on times are 6.8±0.4ms for NIGHT, 4.5±0.3ms for MEDIUM, and 0.9±0.2ms for HIGH.
For 220V/50Hz, change R1 from 510K to 620K, R2 from 20K/2W to 40K/2W, and R6 from 1M to 1.5M.