LS7534 Description
LS7534/LS7535 are monolithic, MOS integrated circuits that are designed for brightness control of incandescent lamps. The outputs of these ICs control the brightness of a lamp by controlling the firing angle of a triac connected in series with the lamp. All internal timings are synchronized with the line frequency by means of a built-in phase-lock loop circuit.
LS7534 Key Features
- Phase-lock loop synchronization allows use as a Wall Switch
- Brightness control of incandescent lamps with touch plates (LS7534) or mechanical switches (LS7535)
- Dual Controls eliminate confusion
- Soft turn-on /turn-off
- Controls the "Duty Cycle" from 23% to 88% (conduction angles for AC half-cycles between 41° and 159°, respectively)
- Operates at 50Hz/60Hz line frequency
- Input for slow dimming
- +12V to +18V DC supply voltage (VSS
- LS7534/LS7535 (DIP); LS7534-S/LS7535-S SOIC
- See Figure 1