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LSI/CSI Lighting Controller Chips

We are proud to be a full stocking distributor for LSI/CSI. Click here to download the LSI/CSI Short form Catalog. ICs that make products better
that extend from the consumer and industrial marketplace to military and aerospace applications.

Proximity / Touch Control Halogen Lamp Dimmer.... (14 Pins)
LS7232NT, LS7232NT-S
Proximity (No-Touch), touch or pushbutton input control
No-Touch control through optical sensing
Controls resistive and inductive loads
Automatic safety cutout
Soft turn-on
Mode inputs select from 7 operating modes
Operating options include Memory and Delayed-Off
 
Multi-Level Dimmer…. (16 Pins)
LS7315, LS7315-SW
Pushbutton input controls
Up to 10 selectable intensity (power) levels
A selected intensity level input becomes an output  
that can drive a LED to indicate the selected intensity

Applications include wall switch (AC Hot) and
plug-in (AC Hot and Neutral) dimmer configurations

 
Multi-Level Dimmer…. (14 Pins)
LS7317, LS7317-S
Pushbutton input controls
Up to 5 selectable intensity (power) levels
A selected intensity level input becomes an output  
that can drive a LED to indicate the selected intensity
Controls high-voltage lamps and electronic-transformer
coupled low-voltage lamps via a triac interface

Applications include wall switch (AC Hot) and
plug-in (AC Hot and Neutral) dimmer configurations

 
Light Dimmer with Up and Down Controls…. (8 Pins)
LS7535FT, LS7535FT-S
Touch or pushbutton UP and DOWN input controls
Momentary UP/DOWN input activation causes instant return to MEMORY ON / OFF state
Prolonged UP/DOWN input activation cause variable dimming
operation towards MAX/MIN Brightness Levels
DOZE input for external control of DIM-TO-OFF time
 
AGC Touch Control Step Dimmer…. (8 Pins)
LS7538, LS7538-S; LS7539, LS7539-S

LS7541, LS7541-S NEW!

Touch Sensitivity is independent of Touch Plate Size and Line-Plug Polarity
Pin selection of three available Brightness Step Sequences
LS7539 and LS7541 are functionally equivalent
Pushbutton control can be used instead of 'Touch'.
Applications include Wall Switch step dimmers and Touch Control step dimmers for small table lamps to large floor lamps.
 
AGC Touch Control Light Switch with Soft-Off …. (8 Pins)
LS7540, LS7540-S NEW!
Touch Sensitivity is independent of Touch Plate Size and Line-Plug Polarity
If Off, a 'Touch' produces Max Intensity (On) instantaneously
If On, a 'Touch' initiates intensity ramp-down (Soft-Off). Max intensity to Off ramp-down time is programmable by an external RC. The Soft-Off feature provides light for the User to exit the room. Ramp-down time = 0 if no RC is connected.
Application of a 'Touch' during ramp-down causes the ramp-down to stop. Once stopped, a 'Touch' causes the ramp-down to Off to resume. Stopping and starting the ramp-down can be repeated as often as desired thus giving the User full control in setting the light intensity.
Pushbutton control can be used instead of 'Touch'.
Applications include Wall Switches and Touch Control modules for small table lamps to large floor lamps
 
Touch Control Halogen Light Dimmer …. (8 Pins)
LS7631, LS7631-S; LS7632, LS7632-S
Touch or pushbutton input control

Controls high-voltage lamps and *transformer-coupled
low-voltage halogen lamps. *Magnetic transformers and
many electronic transformers.

Controls Fluorescents and CFLs via dimming ballasts
Direct replacement for P/N SLB0587
Soft-turn on
Automatic safety cutout
Mode input selects LS7231, LS7232 or LS7233 type operation
LS7631 - dimming cycles through Maximum and Minimum
LS7632 - dimming stops at Maximum and Minimum
 
Touch Control Halogen Light Dimmer…. (8 Pins)
LS7634, LS7634-S; LS7634FO, LS7634FO-S
LS7635, LS7635-S; LS7635FO, LS7635FO-S
LS7634 functionally similar to LS7631
LS7635 functionally similar to LS7632

Compatible with virtually all electronic transformers.

"FO" versions power up Full On.
 
Reverse-Phase (Trailing Edge) Halogen Light Dimmer …. (8 Pins)
LS7636, LS7636-S; LS7636FO, LS7636FO-S NEW!
LS7637, LS7637-S; LS7637FO, LS7637FO-S
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
 
Voltage Control Light Dimmer with Soft On/Off …. (8 Pins)
LS7642, LS7642-S; LS7642FO, LS7642FO-S NEW!
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.

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