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參數(shù)資料
| 型號(hào)： | LS7538 |
| 廠(chǎng)商： | LSI Corporation |
| 英文描述： | TOUCH CONTROL STEP DIMMER LIGHT SWITCH WITH AUTOMATIC GAIN CONTROL (AGC) |
| 中文描述： | 觸摸式控制步進(jìn)調(diào)光器自動(dòng)增益控制（AGC燈開(kāi)關(guān)） |
| 文件頁(yè)數(shù)： | 1/4頁(yè) |
| 文件大?。?/td> | 26K |
| 代理商： | LS7538 |
TOUCH CONTROL STEP DIMMER LIGHT SWITCH
WITH AUTOMATIC GAIN CONTROL (AGC)
FEATURES:
Touch Sensitivity guaranteed to 600pF Touch Plate Capacitance.
Touch Operation independent of line plug polarity.
Pin selection of three available Brightness Step Sequences.
Minimal external components.
AGC Loop stabilizes immediately after Power-Up.
Brightness state is Off after AC power applied.
Brightness state is unchanged if AC power interrupted for < 0.5 sec.
Advanced CMOS design for reliable operating characteristics and low power.
50/60 Hz Line Frequency.
+6V to +9.5V Operation (V
DD
-V
SS
).
LS7538, LS7539 (DIP); LS7538-S, LS7539-S (SOIC) - See Figure 1
APPLICATIONS:
Screw-in and built-in adapter modules for converting table and floor lamps
to touch control for step dimming.
On-Off touch control of under-cabinet fluorescent lamps (LS7539 only).
DESCRIPTION:
The LS7538 and LS7539 are CMOS integrated circuits which provide trigger pulses for triac phase control of incandescent lamps.
The circuits are designed to operate with a wide variety of lamp sizes ranging from small table lamps to large floor lamps.
The AGC Loop automatically adjusts Touch Sensitivity to be independent of lamp size.
There are 3 different Brightness Step Sequences for each version of the IC which can be selected by the Three-State
MODE pin as shown in Table 1.
TABLE 1. BRIGHTNESS STEP MODES
MODE PIN BRIGHTNESS STEP SEQUENCE
FLOAT
OFF-NIGHT LIGHT-MEDIUM-MAXIMUM-OFF
V
DD
OFF-NIGHT LIGHT- LOW MEDIUM-HIGH MEDIUM-MAXIMUM-OFF
Vss (LS7538)
(LS7539)
OFF-MAXIMUM-MEDIUM-NIGHT LIGHT-OFF
OFF-MAXIMUM-OFF
The lamp brightness is made to vary by changing the delay of the TRIG pulse to the triac from the zero-crossing of the
SYNC input. The delays are shown in Table 2 for 50Hz and 60Hz operation along with Delivered Power as a percentage
of Full Power. Figure 2 illustrates the delay.
PIN ASSIGNMENT
TOP VIEW
L
1
2
3
4
8
7
6
5
L
FIGURE 1
TRIG
V
DD
(+V
)
MODE
CONTROL
V
SS
(-V)
SYNC
CLOCK
TOUCH
December 2002
7538/39-120202-1
TABLE 2. BRIGHTNESS POWER LEVELS
Brightness 60Hz Delay
(1
) 50Hz Delay
(2)
% PWR
(3)
Night Light
6.0 ms
Low Medium
4.8 ms
Medium
4.0 ms
High Medium
3.2 ms
Maximum
0.85 ms
(1)
With 300k
connected between Pin 1 and V
DD
.
(2)
With 360k
connected between Pin 1 and V
DD
.
(3)
Percentage of Full Power delivered to a resistive load by the Triac Switch.
7.2 ms
5.7 ms
4.8 ms
3.8 ms
1.0 ms
12
35
53
72
99
LSI/CSI
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
LS7538-LS7539
UL
A3800
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LS7539 | 制造商:LSI 制造商全稱(chēng):LSI 功能描述:TOUCH CONTROL STEP DIMMER LIGHT SWITCH WITH AUTOMATIC GAIN CONTROL (AGC) |
| LS7540 | 制造商:LSI 制造商全稱(chēng):LSI 功能描述:TOUCH CONTROL CONTINUOUS DIMMER with AUTOMATIC GAIN CONTROL (AGC) |
| LS7541 | 制造商:LSI 制造商全稱(chēng):LSI 功能描述:TOUCH CONTROL STEP DIMMER LIGHT SWITCH WITH AUTOMATIC GAIN CONTROL (AGC) |
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