LS7237 Description
LS7237 is a monolithic, MOS integrated circuit designed to control the brightness of an incandescent lamp. The output of the LS7237 triggers a triac connected in series with a lamp(See Figure 5). The lamp brightness is determined by controlling the output conduction angle (triac triggering angle) in relation to the AC line frequency (See Figure 2).
LS7237 Key Features
- PLL synchronization allows use as a Wall Switch
- Provides brightness control of an incandescent lamp with a touch plate or mechanical switch
- Can control speed of shaded pole and universal AC motors
- Controls the "duty cycle" from 23% to 88% (conduction angles for AC half-cycles between 45˚ and 158˚, respectively)
- Operates at 50Hz/60Hz line frequency
- Extension input for remote activation
- +12V to +18V DC Power Supply (VSS
- 8-Pin Plastic DIP , 8-Pin SOIC-See Figure 1
- TOP VIEW