|
|
PDF PT8A2651 Data sheet ( Hoja de datos )
| Número de pieza | PT8A2651 | |
| Descripción | PIR Sensor Light Switch Controller | |
| Fabricantes | Pericom Technology | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de PT8A2651 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
Data Sheet
PT8A2651
PIR Sensor Light Switch Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Features
Description
• Operating voltage: 5V (Typical)
• Average supply current: 120µA (Typical)
• On-chip regulator
• Build-in noise rejection circuit
• 16KHz system oscillator
• Adjustable output duration
• Override function
• ON/AUTO/OFF selectable by MODE pin
• Auto-reset with ZC signal disappearing over 3
seconds
• Output positive pulses to drive triac
• CDS to enable/disable output
• 40 second warm-up
• Quick check mode for installation
• Low cost SOIC-16 package
The PT8A2651 is a CMOS LSI chip designed for
automatic PIR lamp control. The chip is equipped with
operational amplifiers, a comparator, timer, a zero
crossing detector, control circuit, a voltage regulator, a
system oscillator, and an output timing oscillator.
Its PIR sensor detects infrared power variations
induced by the motion of a human body and transforms
it to a voltage variation. If the PIR output voltage
variation conforms to the criteria (refer to the functional
description), the lamp is turned on with an adjustable
duration. The PT8A2651 offers three operating modes
(ON, AUTO, OFF) which can be set through the MODE
pin. While the chip is working in the AUTO mode the
user can override it and switch to the quickly install
mode or manual ON mode or return to the AUTO mode
by switching the power switch. The chip is enclosed in a
16 pin SOIC.
Ordering Information
Ordering No.
PT8A2651W
PT8A2651WE
Package
SOIC-16
Lead free SOIC-16
PT0219(07/05)
1
Ver:0
1 page  
Data Sheet
PT8A2651
PIR Sensor Light Switch Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
RSTB
RSTB is used to reset the chip. It is internal pull-high and active low. The use
of CRST can extend the power-on initial time. If the RSTB pin is an open circuit
(without CRST), the initial time is the default (40 secs).
REST
VCC
Power on initial
Because the band-pass filter and amplifier require a warm up period to reach a
RSTB
stable state after power-on so any inputs should be ignored during this period.
In the AUTO mode within the first 10 seconds of power-on initialization, the
CRST
VSS
system allows override control to access the quickly install mode. However, after
40 seconds of the initial time the system allows override control between ON and FigureF5igR.5SRTSBTBapapplpilcicaattiionn eexxaammpplele
AUTO. It will remain in the warm up period if the total initial time has not elapsed
after returning to AUTO.
In case that the ZC signal disappears more than 3 seconds, the chip will restart the initialization operation. However, the restart
initial time is always 40 seconds and cannot be extended by adding CRST to the RSTB pin as shown in Fig.5.
MODE
MODE is a tri-state input pin used to select the operating mode.
MODE Operating Mode
Description
VDD
Output always ON
TRIAC outputs positive pulse train with synchronizing to ZC
VSS Output always OFF TRIAC outputs low
Outputs remain off state until activated by a valid PIR trigger signal. When working
Open
AUTO
in the AUTO mode, the chip allows override control by switching the ZC signal.
MODE outputs square wave with frequency of 31.25Hz.
ZC
ZC samples AC signal and generates zero crossing pulses to synchronize the TRIAC driver. With an effective ZC signal
switching (switch OFF/ON 2 times within 3 seconds), the system provides the following additional functions:
Quickly install mode: Within 10 seconds after power-on, effective ZC switching will force the chip to enter the quickly install
mode. During the mode, the outputs will be active for a duration of 1.3 seconds each time a valid PIR trigger signal is received. If
a time interval exceeds 32 seconds without a valid trigger input, the chip will enter the AUTO mode automatically.
Figure 6 Test mode
Override control
When the chip is working in the AUTO mode (MODE= open), the output is activated by a valid PIR trigger signal and the
active output duration is controlled by the OSCD oscillating period. The lamp can be switched always to “ON” from the AUTO
mode by either switching the MODE pin to VDD or switching the ZC signal by an OFF/ON operation 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 Fig.7.
If the chip is overridden to ON and there is no further override operation, it will return to AUTO automatically after an internal
preset ON time duration has elapsed. This override ON time duration is set to 5 hours.
During any operation (including override and the end of warm up as well as quick install mode), output will not flash.
PT0219(07/05)
5
Ver:0
5 Page 
Data Sheet
PT8A2651
PIR Sensor Light Switch Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes
Pericom Technology Inc.
Email: [email protected] Web Site: www.pti.com.cn, www.pti-ic.com
China:
No. 20 Building, 3/F, 481 Guiping Road, Shanghai, 200233, China
Tel: (86)-21-6485 0576
Fax: (86)-21-6485 2181
Asia Pacific: Unit 1517, 15/F, Chevalier Commercial Centre, 8 Wang Hoi Rd, Kowloon Bay, Hongkong
Tel: (852)-2243 3660
Fax: (852)- 2243 3667
U.S.A.:
3545 North First Street, San Jose, California 95134, USA
Tel: (1)-408-435 0800
Fax: (1)-408-435 1100
Pericom Technology Incorporation reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or
performance and to supply the best possible product. Pericom Technology does not assume any responsibility for use of any circuitry described other than the
circuitry embodied in Pericom Technology product. The company makes no representations that circuitry described herein is free from patent infringement or other
rights, of Pericom Technology Incorporation.
PT0219(07/05)
11
Ver:0
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet PT8A2651.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| PT8A2651 | PIR Sensor Light Switch Controller | Pericom Technology |
| PT8A2651W | PIR Sensor Light Switch Controller | Pericom Technology |
| PT8A2651WE | PIR Sensor Light Switch Controller | Pericom Technology |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |