LS7631 Ver la hoja de datos (PDF) - LSI Corporation
Número de pieza
componentes Descripción
Fabricante
LS7631 Datasheet PDF : 4 Pages
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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.
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.
MODE
0
1
2
TABLE 1
SHORT TOUCH
LONG TOUCH
PRE-TOUCH Ø POST-TOUCH Ø PRE-TOUCH Ø POST-TOUCH Ø
OFF
ON
MAX(Note 1)
OFF
OFF/MIN
MAX
INTERMEDIATE
Varies up from MIN
Varies down from MAX
Varies from INTERMEDIATE
OFF
ON
MEMORY
(Notes 2, 3)
OFF
OFF
MIN
MAX
INTERMEDIATE
Varies from memory (Notes 2, 3,4)
Varies up from MIN
Varies down from MAX
Varies from INTERMEDIATE
OFF
ON
MAX (Note 1)
OFF
OFF/MIN
MAX
INTERMEDIATE
Varies up from MIN
Varies down from MAX
Varies from INTERMEDIATE
DIMMING
REVERSAL
(Note 5)
N/A
N/A
NO
YES
N/A
N/A
YES
N/A
N/A
YES
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
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.
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.
“Memory” refers to the conduction angle, ø, which existed prior to the current off-state.
A soft turn-on is produced by slewing up ø from minimum to memory upon which the dimming is started.
NO = Dimming direction does not reverse from prior dimming direction.
YES = Dimming direction does reverse from prior dimming direction. N/A = Does not apply.
ABSOLUTE MAXIMUM RATINGS:
PARAMETER
SYMBOL
VALUE
DC supply voltage
Any input voltage
Operating temperature
Storage temperature
VDD - Vss
VIN
TA
TSTG
+7
Vss - 0.3 to VDD + 0.3
0 to +90
-65 to +150
DC ELECTRICAL CHARACTERISTICS:
(TA = +25˚C, all voltages referenced to Vss. VDD = +5V unless otherwise noted.)
PARAMETER
SYMBOL
MIN
TYP
MAX UNIT
Supply voltage
Supply current
VDD
4.5
5.0
5.5
V
IDD
-
300
400 µA
SYNC Lo
VISL
-
-
2.1
V
SYNC Hi
VISH
2.9
-
-
V
EXT, SENS Lo
VIEL
-
-
1.5
V
EXT, SENS Hi
TRIG Lo
TRIG Hi
VIEH
3.5
VOL
-
VOH
-
-
-
V
0.2
-
V
5.0
-
V
TRIG Sink Current
7631/7632-111902-2
ITSNK
35
-
-
mA
UNIT
V
V
°C
°C
CONDITION
-
Output unloaded
VDD = 5.5V
-
-
-
-
-
-
VOTRIG = 2.5V
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