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LS7534 데이터시트(PDF) 8 Page - LSI Computer Systems

부품명 LS7534
상세설명  DIMMER LIGHT SWITCH WITH UP AND DOWN CONTROLS
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제조업체  LSI [LSI Computer Systems]
홈페이지  http://www.lsicsi.com
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LS7534 데이터시트(HTML) 8 Page - LSI Computer Systems

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V SS
UP
DN
DZ
V DD
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
V SS
VDD
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


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