LSI Computer Systems LS7231
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. The output occurs once every half-cycle of the line frequency.| Part No. | LS7231 |
|---|---|
| Datasheet | LS7231 Download |
| Manufacturer |  LSI Computer Systems |
| Description | TOUCH CONTROL LAMP DIMMER |
| Buy | Stock & Price |
FEATURES
:● Phase-lock loop synchronization allows use in Wall Switch 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.)
● Operates at 50Hz/60Hz line frequency.
● Extension input for remote activation.
● Input for slow dimming.
● +12V to +18V DC Power Supply voltage. (VSS - VDD)
● LS7231 to LS7234 (DIP) - See Figure 1 LS7231-S to LS7234-S (SOIC)
DESCRIPTION
: LS7231 through LS7234 are a series of monolithic, MOS integrated circuits designed for the control of brightness of incandescent lamps. All internal timings are synchronized with the line frequency by means of a built-in phase-lock loop circuit. Within the halfcycle, the output can be positioned anywhere between 158˚conduction angle for maximum brightness and 41˚ conduction angle for minimum brightness in relation to the AC line frequency. The positioning of the output is controlled by applying a low level at the SENS input or a high level at the EXT input.
