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參數(shù)資料
| 型號： | LS7541 |
| 廠商： | 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)光器自動增益控制（AGC燈開關(guān)） |
| 文件頁數(shù)： | 2/5頁 |
| 文件大?。?/td> | 63K |
| 代理商： | LS7541 |
INPUT/OUTPUT DESCRIPTION:
CLOCK Input
(Pin 1)
An external resistor connected between this input and
V
DD
, along with an internal capacitor and oscillator stage,
generates a clock which is used for all timing functions.
The recommended value of this resistor for 50Hz and
60Hz operation is specified in the ELECTRICAL CHAR-
ACTERISTICS. The resistor value determines the Bright-
ness Levels produced. (See Table 2)
SYNC Input
(Pin 2)
50 or 60Hz AC input for zero crossing detection.
V
DD
(Pin 3)
Supply voltage positive terminal.
TOUCH Input
(Pin 4)
Input for sensing that a touch has been made
on a lamp surface or other touch plate.
CONTROL I/O
(Pin 5)
An external R-C network connected between this pin
and V
DD
establishes the controlling feedback for the
AGC Loop.
MODE Input
(Pin 6)
A three-state input used to select the desired
Brightness Step Sequence (See Table 1).
V
SS
(Pin 7)
Supply voltage negative terminal.
TRIG
(Pin 8)
The TRIG output produces a negative going pulse eve-
ry half-cycle of the SYNC input to trigger the triac. The
delay, Td, of the pulse with respect to the SYNC signal
determines the Brightness Level produced.
(See Table 2 & Figure 2)
SYNC (Pin 2)
FIGURE 2. OUTPUT DELAY (Td)
Td
Td
TRIG(Pin 8)
ABSOLUTE MAXIMUM RATINGS:
PARAMETER
SYMBOL
VALUE
UNIT
DC supply voltage
Any input voltage
Operating temperature
Storage temperature
V
DD -
V
SS
V
IN
T
A
T
STG
+7
V
V
°C
°C
V
SS
- 0.5 to V
DD
+ 0.5
-20 to +85
-65 to +150
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.
7541-072805-2
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