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參數(shù)資料
| 型號(hào)： | PT8A261W |
| 廠商： | Pericom Semiconductor Corp. |
| 英文描述： | FILTER CABLE/CLAMP 80 OHM 8-10MM |
| 中文描述： | 紅外感應(yīng)燈開關(guān)控制器 |
| 文件頁(yè)數(shù)： | 5/13頁(yè) |
| 文件大小： | 105K |
| 代理商： | PT8A261W |
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Data Sheet
PT8A261/262
PIR Sensor Light Switch Controller
PT0075(04/03)
Ver:5
5
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Functional Descriptions
The PT8A261 and PT8A262 are CMOS LSI chips designed for
automatic PIR lamp control. They can operate in 2-wire con-
figuration for triac applications or in 3-wire configuration for
relay applications.
The device consists of operational amplifiers, a comparator,
timer, a zero crossing detector, control circuit, a voltage regu-
lator, a system oscillator, and an output timing oscillator.
The PIR sensor detects infrared power variations caused by
motion of a human body and transfer to a voltage variation. If
the PIR output voltage variation conforms to criteria, the lamp
is turned on for an adjustable duration. The PT8A261 (or 262)
offers three operating modes (ON, AUTO, OFF) which can be
set through a MODE pin. When the device is working in AUTO
mode, the user can override the mode to switch it to TEST
mode or manual ON mode, or return to the AUTO mode by
switching power switch.
OSCS and OSCD
Pins
OSCS is a system oscillator I/O pin connected to an external
RC to generate system frequency of 16kHz.
OSCD is an output timing oscillator I/O pin. It’s connected to
an external RC to obtain the desired turn-on duration by se-
lecting various values of RC or using a variable resistor.F
OSCD
is the frequency of OSCD pin, output timing can be caculated
as the formula:
T
D
= 21504/F
OSCD
CDS Input Circuit
CDS is a CMOS schmitt trigger input pin. It is used to distin-
guish between day time and night time. When the input volt-
age of CDS is high the PIR input is enabled, when CDS low the
PIR input disabled. The input disable-to-enable debounce
time is 5 seconds. Connect this pin to V
CC
when not using it.
The CDS input is ignored when the TRIAC or RELAY output
is active.
Figure 4. Output Timing Oscillator
Figure 5. CDS Input Circuit
CDS
Rp
V
CC
CDS
Schmitt
Driver
PT8A261/262
Control
Circuit
CDS
Figure 3. System Oscillator
OSCD
C
D
R
D
560K
OSCS
200P
C
S
R
S
PT8A261/
262
PT8A261/
262
T
D
= 21504/F
OSCD
CDS
PIR
Disable
Enable
< 5s
> 5s
Enable
Figure 6. CDS Enable Debounce
CDS
Status
PIR
LOW
Day Time
Disabled
HIGH
Night
Enabled
Table 2. CDS Pin Function
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PT8A262DE | PIR Sensor Light Switch Controller |
| PT8A262P | PIR Sensor Light Switch Controller |
| PT8A262W | PIR Sensor Light Switch Controller |
| PT8A320 | 20V Single N-Channel HEXFET Power MOSFET in a D-Pak package |
| PT8A3201 | 20V Single N-Channel HEXFET Power MOSFET in a D-Pak package |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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? |
| PT8A2621 | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:PIR Sensor Light Switch Controller |
| PT8A2621DE | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:PIR Sensor Light Switch Controller |
| PT8A2621P | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:PIR Sensor Light Switch Controller |
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