器件名称: LS7634
功能描述: TOUCH CONTROL HALOGEN LAMP DIMMER
文件大小: 66.65KB 共4页
简 介:UL
LSI/CSI
LS7634 LS7635 LS7634FO LS7635FO
(631) 271-0400 FAX (631) 271-0405
September 2006
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747
A3800
TOUCH CONTROL HALOGEN LAMP DIMMER
FEATURES: Touch or pushbutton control of incandescent lamps and transformer-coupled halogen lamps Works with Magnetic or ElectronicTransformers 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 PIN ASSIGNMENT - TOP VIEW
LSI
V DD (+V ) MODE 1 8 TRIG V SS (-V )
2
7
LS7634 LS7635
TEST
3
6
EXT
SYNC
4
5
SENS
FIGURE 1
INPUT/OUTPUT DESCRIPTION: 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 AND GENERAL 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 the LS7634/LS7635 family of CMOS ICs as follows: 1. Delayed triac cut-off. When a trigger pulse is due to occu……
