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參數(shù)資料
| 型號(hào)： | PT8A2612W |
| 廠商： | PERICOM SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | SOP-16 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 172K |
| 代理商： | PT8A2612W |
Data Sheet
PT8A2612
PIR Sensor Light Switch Controller
PT0122(04/03)
Ver:0
6
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Override control: When working in the AUTO mode (MODE
= open), the output is activated by a valid PIR signal and the
output active duration is relied on the OSCD oscillating pe-
riod. Lamp can be switched always to “ON” from the AUTO
mode by switching the ZC signal through an OFF/ON opera-
tion of the power switch (OFF/ON twice within 3 seconds).
The term “override” refers to the change of operating mode by
switching the power switch. The chip can be toggled from ON
to AUTO by an override operation. Shows as figure 2.
The PT8A2612 will flash on TRIAC output pin when chang-
ing the operating mode. It will flash 3 times at a 1Hz rate each
time the chip changes from the AUTO mode to another mode
or flash 3 times at a 2Hz rate when returning to the AUTO
mode. However, if the AUTO mode is changed by switching
the MODE switch output will not flash.
25% Lighteness Function
In auto mode, when CDS is high (night), turn on 25% lighteness
until receiving an active PIR signal.
Figure 2. Override control
DimmerFunction
Dimmer function includes soft start and soft stop function, soft
start means lamp increases the lighteness in terms of four steps,
25%, 50%, 75%, 100%. Reversely, soft stop decreases the
lighteness as reverse order (Figure 3).
Dimmer operation varies from the position of the retrigger
point (Figure 4).
Supposing ZC is fixed, the dimmer function can be obtained
by increasing/decreasing the phase difference between the
positive edge of ZC and TRIAC (Figure 5).
The trigger points, in other words, the phase difference, are
7.2ms, 6.2ms, 4.7ms, 1.2ms in terms of 25%, 50%, 75%, 100%,
respectively. But there may be about 20% error in the power
accuracy of each step due to the system oscillator and 50/
60Hz AC line.
ZC
Operating
Mode
AUTO
ON
flash
ON
Figure 3. Dimmer Process
25%
Lightness
75%
50%
60s
100%
4s
25%
75%
50%
(fOSCD = 1Hz)
300s
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT8A261DE | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:PIR Sensor Light Switch Controller |
| PT8A261P | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:PIR Sensor Light Switch Controller |
| PT8A261W | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:PIR Sensor Light Switch Controller |
| PT8A262 | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:PIR Sensor Light Switch Controller |
| PT8A2620 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PIR Sensor Light Switch Controller? |
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