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.

Ordering Info

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

LSI/CSI