HT7712B Datasheet | Holtek Semiconductor

HT7712B/HT7713B Touch Dimmer Features - - - - High noise immunity CMOS technology Operating voltage: 10V Line frequency: 60Hz or 50Hz. High sensitivity and stability - - - Polarity insensitive with AC line Loading range of sense input from 0 to 1200pf Minimum peripheral ponents General Description The HT7712B/HT7713B is a CMOS fabricated LSI chip in an 8-lead DIP package. It is designed to control the brightness of lamps by changing the firing angles of the TRIAC through a touch sensitive input. The chip can be used either as a 3-step or a switch function dimmer. The high sensitivity and stability of the HT7712B/HT7713B ensure its high performance. The touch sensitive input can sustain very heavy capacitive loading and propagate sense through a highly resistive line. The application circuit of the HT7712B/HT7713B is very simple. Of these two chips, the HT7713B is a 3-step dimmer controller whose trigger angles are set at 17°, 86°, 121° - where 17° is the brightest, 86° the medium brightness, and 121° the darkest. The HT7712B, on the other hand, is an ON/OFF switch whose ON state is set at an angle of 17°. Pin Assignment Block Diagram 26th Mar ’97 .Data Sheet.in HT7712B/13B Pad Coordinates Pad No. 1 2 3 4 5 Unit : mil - 35.33 - 35.33 - 35.33 - 35.33 30.83 20.07 11.97 - 21.60 - 29.70 - 29.70 Pad No. 6 7 8 9 10 35.24 35.24 35.24 -...