LSI Computer Systems LS7635
the LS7634/LS7635 family of CMOS ICs as follows: 1. When a trigger pulse is due to occur at a conduction angle which coincides with the on-state of the triac, the trigger pulse is delayed until the triac has turned off. This eliminates the underlying cause of half-waving.| Part No. | LS7635 |
|---|---|
| Datasheet | LS7635 Download |
| Manufacturer |  LSI Computer Systems |
| Description | TOUCH CONTROL HALOGEN LAMP DIMMER |
| Buy | Stock & Price |
FEATURES
:● Touch or pushbutton control of high-voltage lamps and *transformer-coupled low-voltage halogen lamps *Magnetic Transformers and most Electronic Transformers
● Automatic Safety Shutdown
● Three operating modes
● Extension input for remote activation
● 50Hz/60Hz AC line frequency
● +5V Power Supply (VDD -VSS)
● LS7634, LS7635 (DIP); LS7634-S, LS7635-S (SOIC); LS7634FO, LS7635FO (DIP); LS7634FO-S, LS7635FO-S (SOIC) - See Figure 1
APPLICATIONS
: Electronic dimmers for wall switch control of ceiling mounted lighting, foot switch control of large floor lamps and hand switch control of table lamps. BACKGROUND ANDGENERAL DESCRIPTION
: A typical electronic dimmer may not operate properly with the inductive load encountered when driving a transformer-coupled low-voltage halogen lamp. The inductive load can cause a phenomenon called half-waving, wherein the triac fires in alternate half-cycles only, which may lead to the thermal destruction of the load transformer. The problems encountered in driving an inductive load are addressed by Delayed triac cut-off.
