TIMING CHARACTERISTICS
(See Figures 2, 3 and 4):
PARAMETER
SYNC
Frequency
SHORT
Touch
LONG
Touch
TRIG
pulse width (see Note 5)
Conduction Angle
ø incremental steps
(Note 1)
Soft-on slew rate
A0 to A1/A2 to A0 slew rate
(Note 2)
A1 to B1/B2 to A2 slew rate
(Note 3)
B1 to B2 delay
(Note 4)
Note 1:
Note 2:
Note 3:
Note 4:
SYMBOL
fs
T
SI
T
SI
T
S2
T
S2
Tw
Tw
ø
∆ø
S
S
S
S
S
AA
S
AA
S
BA
S
BA
T
BD
T
BD
MIN
40
42
50
342
410
-
-
50
-
-
-
-
-
-
-
-
-
TYP
-
-
-
-
-
130
156
-
1.4
1.4
1.4
1.4
1.4
1.4
1.4
500
600
MAX
70
333
400
infinite
infinite
-
-
154
-
-
-
-
-
-
-
-
-
UNI T
Hz
ms
ms
ms
ms
µs
µs
deg
deg
deg/8.33ms
deg/10ms
deg/33.3ms
deg/40ms
deg/66.7ms
deg/80ms
ms
ms
CONDITION
-
60Hz
50Hz
60Hz
50Hz
60Hz
50Hz
-
-
60Hz
50Hz
60Hz
50Hz
60Hz
50Hz
60Hz
50Hz
Total number of steps = 77.
Number of steps from A0 to A1, or A2 to A0 = 55.
Number of steps from A1 to B1 or B2 to A2 = 21.
ø is at minimum between B1 and B2. T
BD
is applicable for LS7634 only.
For LS7635 when minimum ø is reached, dimming direction reverses only if the
LONG
Touch is terminated and reapplied.
Note 5:
T
W
= 488us (60Hz), 586us (50Hz) available. Contact factory for details.
FIGURE 2. TRIG OUTPUT CONDUCTION ANGLE, Ø
SYNC
ø
TRIG
The information included herein is believed to be
accurate and reliable. However, LSI Computer Systems,
Inc. assumes no responsibilities for inaccuracies, nor for
any infringements of patent rights of others which may
result from its use.
T
W
FIGURE 3. LS7634 TRIG, Ø vs TOUCH (SENS OR EXT)
T
S1
SENS
SHORT
SHORT
LONG
A0
150º
T
S2
SHORT
LONG
SHORT
LONG
Ø
MODE Ø
100º
50º
OFF
342ms
A2
B2
SLOPE = S
BA
SLOPES = S
AA
A1
B1 B2
A0
A2
SLOPE = Ss
A0
MEMORY
150º
Ø
MODE 1
100º
50º
OFF
A1
B1
B2
A2
REVERSE
A0
150º
Ø
MODE 2
100º
50º
OFF
B2
A2
A1
B1 B2
A2
REVERSE
7634/7635-071406-3
LSI [ LSI COMPUTER SYSTEMS ]
