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LS7631 Datasheet(PDF) 4 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) 4 Page - LSI Computer Systems

   
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150º
100º
50º
OFF
150º
100º
50º
OFF
150º
100º
50º
OFF
Ø
MODE Ø
Ø
MODE 1
Ø
MODE 2
TS1
TS2
342ms
SHORT
SHORT
SLOPE = SS
SLOPE = SAA
SLOPE = SBA
LONG
LONG
LONG
LONG
A2
A0
A0
A1
B1
B2
A2
A2
B2
B1
A1
A2
B2
B1
A1
A0
A0
A0
A0
A2
A2
MEMORY
A2
MEMORY
SHORT
SHORT
REVERSE
REVERSE
SENS
LONG
FIGURE 4. LS7632 TRIG, Ø vs TOUCH (SENS OR EXT)
7631/32-112102-4
EXT
10k
IN914
TOUCH PLATE
*R
200k
MPS8599
FIGURE 7.
ELECTRONIC EXTENSION
*R
P
*R = 2M
Ω for 115VAC
*R = 3.6M
Ω for 220VAC
All Resistors 1/4W
EXTENSIONS: All switching and dimming functions can be
implemented by utilizing the EXT input. Use a pushbutton or
the electronic switch in conjunction with a Touch Plate as
shown in Figure 7. When the plate is touched, a logic high
level is generated at the EXT input of the IC for both half-
cycles of the line frequency. (See Figure 6)
APPLICATION EXAMPLE:
A typical implementation of the light dimmer circuit is shown in Fig. 6.
Here the brightness of the lamp is set by touching the touch plate.
The function of different components are as follows:
• The 5V DC supply for the chip is provided by Z, D1, R1, C2 and C5.
• R2 and C4 generate the filtered signal for the SYNC input
for synchronizing the internal PLL with the line frequency.
• R3 and C6 act as a filter circuit for the electronic extension.
If extensions are not used, the EXT input (Pin 6) should be
tied to Vss (Pin 7).
• R4, R5 and R6 set up the sensitivity of the SENS input.
• C3 is the filter capacitor for the internal PLL.
• R8 provides current limiting and isolation between the chip
output and the triac gate.
• C1 and L are RFI filter circuits.
P
115VAC
OR
220VAC
N
LAMP
C1
T
L
C2
R1
R2
R8
R3
C5
D1
1
2
3
4
8
7
6
5
R4
C3
C4
TRIG V SS
EXT SENS
V DD MODE
CAP SYNC
+
LS7631/LS7632
R6
R5
FIGURE 6. A Typical Halogen Lamp Dimmer Wall Switch
G
MT2
MT1
Z
-
ELECTRONIC
EXTENSION
(FIG. 7)
EXTN
P
C6
SEE NOTE 3
SEE NOTE 2
R7
TOUCH
PLATE
SEE
NOTE 4
C1 = 0.15µF, 200V
C1 = 0.15µF, 400V
C2 = 0.15µF, 200V
C2 = 0.082µF, 400V
C3 = 0.02µF, 10V
C4 = 0.002µF, 10V
C5 = 100µF, 10V
C6 = 0.1µF, 10V
R1 = 270
Ω, 1/2W
R1 = 1k
Ω, 1W
R2 = 680
Ω, 1/4W
R2 = 1.5M
Ω, 1/4W
R3 = 1.5M
Ω, 1/4W
R4 = 1M
Ω to 5MΩ, 1/4W
(Select for Sensitivity)
R5, R6 = 2.7M
Ω, 1/4W
R5, R6 = 4.7M
Ω, 1/4W
R7 = 150k
Ω, 1/4W
R8 = 62
Ω, 1/4W
D1 = 1N4148
Z = 5.6V, 1W (Zener)
T = Q4004L4 Typical Triac (1)
T = Q5003L4 Typical Triac (1)
L = 100µH (RFI Filter)
L = 200µH (RFI Filter)
(1) For loads greater than 6A,
use an alternistor
.
= component change for 220VAC
*
*
*
*
*
*
*
*
NOTES
1. All circuits connected by broken lines are optional.
2. C6 is used only with electronic extension
and R7 is used only with a pushbutton.
3. Connection between Pin 6 & Pin 7 should
be broken when EXT is used.
4. As a precaution, transformer should have
thermal protection.


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