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參數(shù)資料
| 型號(hào)： | LS7237 |
| 廠商： | LSI Corporation |
| 英文描述： | TOUCH CONTROL LAMP STEP DIMMER |
| 中文描述： | 觸摸式控制燈明暗步 |
| 文件頁(yè)數(shù)： | 2/4頁(yè) |
| 文件大?。?/td> | 43K |
| 代理商： | LS7237 |
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.
CONDUCTION ANGLE, BRIGHTNESS LEVEL
No output
45
70
105
158
Off
Night Light
Mood Light
Medium
Maximum
NOTE
: In the schematic shown in Figure 5, the SYNC Input sig-
nal is delayed in phase with respect to the AC Line by about 7°.
This delay reduces the conduction angle, with respect to the
AC Line by 7° from the values shown above.
7237-041395-2
TRIG
SYNC
T
W
T
W
FIGURE 2. TRIG OUTPUT CONDUCTION ANGLE,
EXT (Pin 6)
The EXT input is functionally similar to the SENS input with
the exception that a high-level pulse is the active signal. It is
recommended that the EXT input be used instead of the
SENS input when long extension wires are used between the
IC and the sensing circuitry (See Figure 5 and Figure 6) be-
cause the EXT input is less susceptible to “Noise”.
V
DD
(Pin 7)
Supply voltage negative terminal.
TRIG (Pin 8)
The TRIG output is a low-level pulse of fixed duration oc-
curring once every half-cycle of the SYNC input. The con-
duction angle, of the output in relation to the SYNC signal
controls the lamp brightness. The 5 levels of brightness cor-
respond to the 5 values of as follows:
SENS
, MODE 0
, MODE 1
, MODE 2
T
S1
OFF
OFF
OFF
70
45
OFF
105
70
158
158
105
OFF
OFF
158
158
70
OFF
FIGURE 3. TRIG OUTPUT CONDUCTION ANGLE, , VS SENS INPUT
158
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