LS7231-7234 Overview
LS7231 through LS7234 are a series of monolithic, MOS integrated circuits designed for the control of brightness 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.
LS7231-7234 Key Features
- Phase-lock loop synchronization allows use in Wall Switch
LS7231-7234 Applications
- Provides brightness control of incandescent lamps with touch plates or mechanical switches
- Controls the "duty cycle" from 23% to 88% (conduction angles for AC half-cycles between 41˚ and 158˚, respectively.)