UP

DN

DZ

FIGURE 6A.

DOZE CIRCUIT FOR LS7534

Sense

DOZE

SWITCH

4093

4093

4093

10µF

330K

4093

MP58098

+

-

3.3M

330K

3.3M

NOTE: All Resistors 1/4W, all Capacitors 25V

DOZE

SWITCH

4093

4093

FIGURE 6B.

DOZE CIRCUIT FOR LS7535

4093

4093

+

-

DZ

Sense

3.3M

UP

DN

IN914

IN914

3.3M

3.3M

10µF

NOTE: All Resistors 1/4 W, all Capacitors 25V.

DOZE CIRCUIT: (Figures 6A and 6B)

The Doze circuits shown generate a slow clock (0.04Hz) at

the DZ terminal. If the UP/DOWN inputs (Figures 5A and

5B) are not activated, the Sense node of the Doze circuit

sits at a logic high level.

A momentary pressing of the

Doze switch sets the SR flip-flop, enabling the oscillator.

Every negative transition of the clock (DZ terminal) causes

the lamp brightness to be reduced by equal increments, un-

til eventurally the lamp is shut- off.

When the lamp is off, the oscillator has no further effect on

the dimmer circuit. When the lamp is turned on again by

activating the UP input, the SR flip-flop is reset and the DZ

clock is turned off.

When the Doze circuit is used, the connection between

DOZE input (Pin 2) and Vss (Pin 1), as shown in Figures

5A and 5B, should be removed.

FIGURE 7. OPERATING DESCRIPTION OF A FULL-FEATURE LS7535 WALL SWITCH

See Application Note

AN 705 for the Schematic

DUAL CONTROL CONTINUOUS

DIMMER WITH UNIQUE

DELAYED OFF FEATURE

INITIAL CONDITION

ACTION

RESULT

Off

SHORT PRESS On

“Softly” turns On to memory intensity (1)

Off

LONG PRESS On

Varies from min. intensity towards max. intensity (2)

On

LONG PRESS On

Varies towards max. intensity (2)

On

LONG PRESS Off

Varies towards min. intensity (3)

On

SHORT PRESS Off

“Softly” turns Off

On

PRESS Auto-Dim

Begins auto-dimming to off (4)

Auto-Dimming

SHORT PRESS On

“Softly” returns to memory intensity (5)

Auto-Dimming

LONG PRESS On

Varies towards max. intensity (2)

Auto-Dimming

SHORT PRESS Off

“Softly “ turns off

Auto-Dimming

LONG PRESS Off

Varies towards min. intensity (3)

Auto-Dimming

PRESS Auto-Dim

No change

Auto-Dimming

None

Auto-dims to Off

(1) Last intensity achieved before turn off is stored as memory intensity.

(2) On (Dim Up) varies intensity towards maximum and stops there.

(3) Off (Dim Down) varies intensity towards minimum and stops there.

(4) Auto-dimming period controlled by RC components and intensity level when Auto-Dim is activated.

(5) Last intensity achieved before Auto-Dim started is stored as memory intensity.

7535-012703-8

ON

DIM UP

OFF

DIM DOWN

AUTO DIM