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LS7631 Datasheet(PDF) 2 Page - LSI Computer Systems

Part No. LS7631
Description  TOUCH CONTROL HALOGEN LAMP DIMMER
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Maker  LSI [LSI Computer Systems]
Homepage  http://www.lsicsi.com
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LS7631 Datasheet(HTML) 2 Page - LSI Computer Systems

   
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The functional differences between LS7631 and LS7632 are:
LS7631 - When a LONG touch is applied, the dimming direction auto-
matically reverses whenever maximum or minimum conduction an-
gles are reached.
LS7632 - When a LONG touch is applied, the dimming stops when-
ever maximum or minimum conduction angles are reached. In order to
change dimming levels from maximum or minimum, LONG touch must
be removed and reapplied.The purpose of this feature is to allow the
user to positively locate maximum and minimum conduction angles.
TABLE 1
MODE
SHORT TOUCH
LONG TOUCH
DIMMING
REVERSAL
PRE-TOUCH Ø
POST-TOUCH Ø
PRE-TOUCH Ø
POST-TOUCH Ø
(Note 5)
OFF
MAX(Note 1)
OFF/MIN
Varies up from MIN
N/A
0
ON
OFF
MAX
Varies down from MAX
N/A
INTERMEDIATE
Varies from INTERMEDIATE
NO
OFF
MEMORY
OFF
Varies from memory (Notes 2, 3,4)
YES
1
(Notes 2, 3)
MIN
Varies up from MIN
N/A
ON
OFF
MAX
Varies down from MAX
N/A
INTERMEDIATE
Varies from INTERMEDIATE
YES
OFF
MAX (Note 1)
OFF/MIN
Varies up from MIN
N/A
2
ON
OFF
MAX
Varies down from MAX
N/A
INTERMEDIATE
Varies from INTERMEDIATE
YES
Note 1:
A soft turn-on is produced by slewing up the conduction angle, ø, from minimum at the rate of 1.4
˚/4.17ms (60Hz).
There are a total of 84 discrete values of ø.
Note 2:
A soft turn-on is produced by slewing up ø, from minimum to memory.
Upon power-up the memory value is defaulted to maximum conduction angle.
Note 3:
“Memory” refers to the conduction angle, ø, which existed prior to the current off-state.
Note 4:
A soft turn-on is produced by slewing up ø from minimum to memory upon which the dimming is started.
Note 5:
NO = Dimming direction does not reverse from prior dimming direction.
YES = Dimming direction does reverse from prior dimming direction. N/A = Does not apply.
7631/7632-111902-2
LS7632 NOTE: If the User applies a LONG Touch when
the TRIG Conduction Angle is within a “few” degrees of
Maximum or Minimum, the TRIG Conduction Angle can
move to Maximum or Minimum and stop without the User
being able to observe a change in brightness. Therefore,
the User should be instructed that if no change in bright-
ness is observed in response to a LONG Touch, the
LONG Touch should be removed and reapplied in order
to produce a change in brightness.
ABSOLUTE MAXIMUM RATINGS:
PARAMETER
SYMBOL
VALUE
UNIT
DC supply voltage
VDD - Vss
+7
V
Any input voltage
VIN
Vss - 0.3 to VDD + 0.3
V
Operating temperature
TA
0 to +90
°C
Storage temperature
TSTG
-65 to +150
°C
DC ELECTRICAL CHARACTERISTICS:
(TA = +25˚C, all voltages referenced to Vss. VDD = +5V unless otherwise noted.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
CONDITION
Supply voltage
VDD
4.5
5.0
5.5
V
-
Supply current
IDD
-
300
400
µA
Output unloaded
VDD = 5.5V
SYNC Lo
VISL
-
-
2.1
V
-
SYNC Hi
VISH
2.9
-
-
V
-
EXT, SENS Lo
VIEL
-
-
1.5
V
-
EXT, SENS Hi
VIEH
3.5
-
-
V
-
TRIG Lo
VOL
-
0.2
-
V
-
TRIG Hi
VOH
-
5.0
-
V
-
TRIG Sink Current
ITSNK
35
-
-
mA
VOTRIG = 2.5V


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