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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.
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