SYNC
ø
OUT
T
W
T
W
FIGURE 2. OUTPUT CONDUCTION ANGLE,
ø
T
S1
T
S2
T
S2
T
S2
T
S1
T
S1
UP
T
S1
DOWN
200
ø
150
(Degrees)
100
50
0
0
T
US
T
DS
334ms
T
UL
334ms
T
DL
334ms
B
A
4
C
D
8
12
16
0
GH
F J
K
E
4
8
12
0
M
L
4
8
12
SECONDS
M
16
20
24
FIGURE 3. OUTPUT CONDUCTION ANGLE,
ø
, vs UP/DOWN INPUTS
Note 1.
UP/DOWN input polarity shown is for LS7534. For LS7535, the polarity is reversed.
Note 2.
Points A, D, E and K correspond to minimum brightness, where ø = 41°.
Points B, C, G and H correspond to maximum brightness, where ø = 159°.
Points denoted by M correspond to an arbitrary intermediate brightness.
Note 3.
Points F, J and L correspond to ø = 64°. The ramp-up or ramp-down rate of ø changes at these points
(upon long activation only) indicated by the discontinuity of the slopes. The interval E to F or J to K,
in terms of time and angle, are 934ms and 23°, respectively.
7535-012703-4
LSI [ LSI COMPUTER SYSTEMS ]
