Brief Description

LS7636-S, LS7636, LS7636FO-S, LS7636FO, LS7637-S, LS7637, LS7637FO-S, LS7637FO

Category: Lighting Controls

Status: In Production

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:

• Pushbutton control for direct or remote activation or touch control for direct activation.
• Controls high-voltage lamps and *electronic transformer coupled low-voltage halogen lamps. *Compatible with all electronic transformers.
• Controls Fluorescents and CFLs via dimming ballasts
• Drives FETs or IGBTs
• Reverse-phase technology eliminates RFI generation
• Soft turn-on and soft turn-off
• “FO” versions power up Full On after application of AC.
• 3-state input selects one of three modes of operation
• LS7636 P/Ns – dimming cycles through Maximum and Minimum
• LS7637 P/Ns – dimming stops at Maximum and Minimum

Description:

Since the operating currents of some electronic transformers are below the holding current of most triacs, a typical triac based (leading-edge) dimmer may not operate properly when driving an electronic transformer-coupled low-voltage halogen lamp. The filtering components in the electronic transformer which prevent its operating frequency from generating line interference can also inhibit triac triggering. The LS7636_LS7637 family of reverse-phase dimmer ICs drive FETs or IGBTs and ‘slowly’ turns on current beginning at the AC input zero-crossing. This ‘slow’ current turn on is ideal for interfacing with the primary of any electronic transformer and also eliminates the RFI generation caused by the sudden turn on of current when using a triac based dimmer.

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
-S
-SW
-TS

8

300

150

14

300

150

173

16

300

150

300

18

300

300

20

300

300

173

24

600

300

173

28

600

300

173

38

173

40

600

44

240

LSI/CSI