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Voltage Control Light Dimmer with Soft On/Off (8 Pins)
LS7642-S, LS7642, LS7642FO-S, LS7642FO
Category: Lighting Controls
Status: In Production
Stock Availability: DIP, SOIC
All of our Standard Products are RoHS Compliant
For pricing and availability, you may contact us, or request a quote. Most of our standard parts are available for purchase on Digi-Key, and through our Distributors.
Features:
• Touch or pushbutton input control for soft turn-on and turn-off.
• Analog voltage input directly controls lamp intensity.
• Interfaces easily with a uC for programmable lighting control.
• Controls high-voltage lamps and *transformer-coupled low-voltage halogen lamps. *Magnetic transformers and virtually all electronic transformers.
• Automatic safety shutdown.
• Controls Fluorescents and CFLs via dimming ballasts.
• “FO” versions power up at the intensity set by the analog voltage.
Description:
The LS7642 is an innovative light dimmer allowing direct control of illumination with analog voltage. The analog voltage applied at the brightness control input directly controls the conduction angle of a triac in series with the lamp. For manual dimming applications such as wall switches, floor and table lamps etc, a sliding or rotary potentiometer with a center tap can serve as the controlling element. For automated applications such as uC controlled illumination, dawn, dusk and daylight emulation in chicken coops etc., the control voltage can be provided by the uC with built-in or external D/A converter creating accurate control of dimming patterns. Turn-on and turn-off of the lamp is made with a touch or push-button or uC signal applied at the SENSE/ input or the EXT input. In both turn-on and turn-off events, the brightness is softly ramped up and ramped down, respectively.
Code
Package
Notes
P/N
RoHS Compliant Standard plastic DIP
1, 2, 3
P/N – S
RoHS Compliant Standard SOIC
1, 2, 3, 4
P/N – SW
RoHS Compliant Widebody SOIC option
1, 2, 3, 4
P/N – S14
RoHS Compliant 14-pin SOIC version of 8-pin part
1, 2, 3, 4
P/N – TS
RoHS Compliant TSSOP
1, 2, 3, 4
P/N – TS24
RoHS Compliant 24-pin TSSOP version of 20-pin part
1, 2, 3, 4
Example: LSxxxx-TS = the LSxxxx in the RoHS Compliant TSSOP package-type
Note 1: See Table for package body widths Note 2: Package outline drawings conform to JEDEC standards Note 3: Packages shipped in anti-static tubes Note 4: Tape and Reel option available. Contact factory for details
ADDITIONAL ORDERING OPTIONS: Probed Wafers (P/N-PW), Waffle Packed Die (P/N-WP)
Package Body Widths
# of Pins
P/N, -C, -CM mils
-S mils
-SW mils
-TS mils
8
300
150
–
–
14
300
150
–
173
16
300
150
300
173
18
300
300
–
–
20
300
300
–
173
24
600
300
–
173
28
600
300
–
173
38
–
–
–
173
40
600
–
–
–
48
–
–
–
240