參數(shù)資料
型號(hào)： PT8A262W
廠商： Pericom Semiconductor Corp.
英文描述： PIR Sensor Light Switch Controller
中文描述： 紅外感應(yīng)燈開關(guān)控制器
文件頁(yè)數(shù)： 7/13頁(yè)
文件大小： 100K
代理商： PT8A262W
Data Sheet
PT8A261/262
PIR Sensor Light Switch Controller
PT0075(04/03)
Ver:5
7
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Power On Initial
The PIR signal amplifier requires a warm up period after power-
on. The input should be disabled during this period.
In the AUTO mode within the first 10 seconds of the initial
time the chip allows override control to enter the quickly in-
stall mode.After 40s of the initial time the chip allows over-
ride control between ON and AUTO. It will remain in the warm
up period if the total initial time has not elapsed after return-
ing to AUTO.
In case that the ZC signal disappears more than 3 seconds, the
chip will restart the initialization operation. However, the re-
start initial time is always 40 seconds and cannot be extended
by adding C
RST
to the RST pin as shown in Figure 6.
Trigger
The trigger timing is shown in Figure 9.
Retrigger -- If another signal is attained in trigger hold time,
the circuit will be retriggered, and the trigger hold time will be
restarted from this time.
Figure 9. Trigger Timing
Comparator
Input
+trigger level
-trigger level
CDS
Output
Enable
5s
RELAY
TRIAC
Test
Enable
Detect
Enable
10s test
enable
ON
ON
(Note2)
pulse out
power on delay time
40s
RST
Comparator
Output
>24ms
<24ms
(Note1)
Notes:
1. The output is activated if the trigger signal conforms to the following criteria:
- More than 3 triggers within 2 seconds,
- A trigger signal sustain duration > 0.34 seconds, and
- 2 triggers within 2 seconds with pulse duration of one > 0.16 seconds.
- The effective comparator output width is 24ms.(Fosc=16KHz)
2. The output duration is set by an external RC connected to the OSCD pin.
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