PT8A2641 PERICOM | Alldatasheet
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12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 Product Features Product Description Operating voltage: 5V (Typ.) Average supply current: 120µ A (Typ.) 2 stage op-amp for filter. Build-in noise rejection circuit. On-chip regulator. Adjustable output duration Override function. ON/AUTO/OFF selectable by MODE pin Apply to AC 220V/50Hz and 110V/60Hz. Auto-reset if the ZC signal disappears over 3 seconds Output p ulse (PT8A2641/5/7) to drive triac or output level (PT8A2642/6/8) to drive relay. CDS to enable/disable output. 40 second warm-up. Quick check mode for installation. The PT8A264X is a CMOS LSI chip designed for use in automatic PIR lamp control. It can operate with a 2 -wire configuration for triac applications or with a 3 -wire configuration for relay applications. The chip is equipped with operatio nal 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 PT8A264X 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. Block Diagram Figure 1 Block Diagram OP2O OP2N OP2P OP1O OP1P OP1N OSCD OSCS ZC RSTB Vcc GND RELAY MODE CDS TRIAC Comparator latch circuit Mode and CDS control circuit Control circuit Voltage divider Regulator delay oscillator System oscillator Frequency divider Delay circuit Zero cross debounce Output circuit VEE COMPO CDSO
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Pin Configuration GND RELAY OSCD OSCS ZC MODE Vcc OP2O OP2N OP2P OP1O OP1N OP1P VEE CDS GND TRIAC OSCD OSCS ZC MODE Vcc OP2O OP2N OP2P OP1O OP1N OP1P RSTB VEE CDS PT8A2641P/2641W RSTB PT8A2642P/2642W GND RELAY OSCD OSCS ZC MODE Vcc OP2O OP2N OP2P OP1O OP1N OP1P VEE CDS GND TRIAC OSCD OSCS ZC MODE Vcc OP2O OP2N OP2P OP1O OP1N OP1P CDSO VEE CDS CDSO PT8A2645P/2645W PT8A2646P/2646W GND RELAY OSCD OSCS ZC MODE Vcc OP2O OP2N OP2P OP1O OP1N OP1P VEE CDS GND TRIAC OSCD OSCS ZC MODE Vcc OP2O OP2N OP2P OP1O OP1N OP1P COMPO VEE CDS COMPO PT8A2647P/2647W PT8A2648P/2648W
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Pin Description Part number Pin name I/O Description 2641 2642 2645 2646 2647 2648 1 1 1 1 1 1 GND I Ground - 2 - 2 - 2 RELAY O RELAY drive output through an external NPN transistor, active high 2 - 2 - 2 - TRIAC O TRIAC drive to output two negative pulses, active negative pulse. 3 3 3 3 3 3 OSCD I/O Output timing oscillator I/O It is connected to an external RC to adjust output duration. 4 4 4 4 4 4 OSCS I/O System oscillator I/O OSCS is connected to an external RC to set the system frequency. The system frequency =16KHz for normal application. 5 5 5 5 5 5 ZC I Schmitt input for AC zero crossing detection 6 6 6 6 6 6 CDS I CDS is connected to a CDS voltage divider for daytime/night auto-detection. Low input to this pin can disable the PIR input. CDS is a schmitt trigger input with 5-second input debounce time. 7 7 7 7 7 7 MODE I/O Operating mode selection input: VCC: TRIAC/RELAY is always ON GND: TRIAC/RELAY is always OFF Open: Auto detection, outputs 31.25Hz square wave 8 8 8 8 8 8 Vcc I Positive power supply 9 9 9 9 9 9 VEE O Regulated voltage output The output voltage is about 3.6V with respect to GND. 10 10 - - - - RSTB I Chip reset input, active low - - 10 10 - - CDSO CDS control circuit output signal, active high - - - - 10 10 COMPO output of comparator, active high 11 11 11 11 11 11 OP1P I Noninverting input of OP1 12 12 12 12 12 12 OP1N I Inverting input of OP1 13 13 13 13 13 13 OP1O O Output of OP1 14 14 14 14 14 14 OP2P I Noninverting input of OP2, internal 1.8V default. 15 15 15 15 15 15 OP2N I Inverting input of OP2 16 16 16 16 16 16 OP2O O Output of OP2 Note: The active output width of COMPO is inversely proportional to the system frequency.
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Maximum Ratings Recommended Operating Conditions Symbol Parameter Test Condition Min. Typ. Max. Unit VCC Condition VCC Operating Voltage - - 4.75 5.0 6.0 V VIH “H” Input Voltage - - 0.8 - - VCC VIL “L” Input Voltage - - - - 0.2 VCC FSYS System Oscillator Frequency 5V ROSCS=430K COSCS=180P 12.8 16 19.2 KHz TA Operating temperature - - -20 25 70 °C
Electrical Characteristics
Symbol Parameter Test Condition Min. Typ. Max. Unit VCC Condition VTH1 CDS “H” Transfer Voltage 5V 3.0 3.3 3.6 V VTL1 CDS “L” Transfer Voltage 5V 0.9 1.2 1.5 V VTH2 ZC “H” Transfer Voltage 5V 2.6 2.9 3.2 V VTL2 ZC “L” Transfer Voltage 5V 1.1 1.4 1.7 V VTH3 OSCS “H” Transfer Voltage 5V 2.7 3 3.3 V VTL3 OSCS “L” Transfer Voltage 5V 0.8 1 1.2 V VTH4 OSCD “H” Transfer Voltage 5V 2.7 3 3.3 V VTL4 OSCD “L” Transfer Voltage 5V 0.8 1 1.2 V I IH High level leakage current (ZC,CDS) 5V VIH=4.5V -1 - 1 A I IL Low level leakage current (ZC,CDS) 5V VIL=0.5V -1 - 1 A I IHRSTB RSTB Input high level current 5V VIH=4.5V -1 - -5 A IOH Output source current(RELAY, TRIAC) 5V VOH=4.5V –6 - - mA IOL Output sink current(RELAY, TRIAC) 5V VOL=0.5V 15 - - mA IOH Output source Current(CDSO,COMPO) 5V VOH=4.5V –5 - - mA IOL Output sink current(CDSO,COMPO) 5V VOL=0.5V 5 - - mA Supply Voltage to Grourd Potential (Input & VCC Only) - - - - - -GND -0.5V to Vcc+0.5V Supply Voltage to Grourd Potential (output & D/O Only)- - - - - GND -0.5V to Vcc+0.5V Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Voltage regulation circuit Symbol Parameter Test Condition Min. Typ. Max. Unit VCC Condition VEE Regulator Output Voltage 5V No load 3.24 3.6 3.96 V OP2P Noninverting input of OP2 5V No load 1.62 1.8 1.98 V VO Line regulation - 4.5VCC5.5V, IL =1mA - 30 50 mV VLDR Load regulation 5V 0.5mA IL2mA - 60 100 mV Operational amplifier and windows comparator Symbol Description Test condition Min TYP Max Unit BW 3dB band width - 10 - - KHz VH Threshold of windows comparator VCC=5V 1.8 2.0 2.2 V VL VCC=5V 1.35 1.5 1.65 V Frequency of oscillator and Timing of ZC and trigger output Symbol Description Test condition Min Typ Max Unit FMODE Oscillator frequency/512 VCC=5V, RS=430K ,CS=180P (PT8A264X) 25 31.25 37.5 Hz TDZT Delay time from ZC to TRIAC 1.16 1.45 1.74 ms TTPW TRIAC Pulse Width 50 62.5 75 s TDZR Delay time from ZC rising edge to Relay - 125 200 s Power Dissipation Symbol Description Test condition Min Typ Max Unit ICC Power supply current VCC=5V, RS=430K ,CS=180P, RD =2M, CD=104, other Input Pins=GND, all outputs float. - 120 200 A
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Power on initial: Because the band-pass filter and amplifier require a warm up period to reach a 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 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 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 initializ ation 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: a tri-state input pin used to select the operating mode. MODE Operating Mode Description VCC Output always ON RELAY outputs high at ZC rising edge TRIAC outputs negative pulse train with synchronizing to ZC GND Output always OFF RELAY outputs low TRIAC outputs high Open AUTO Outputs remain off state until activated by a valid PIR trigger signal. When working in the AUTO mode, the chip allows override control by switching the ZC signal. MODE outputs square wave with frequency of 31.25Hz. ZC: a CMOS input structure. It receives AC line frequency and generates zero crossing pulses to synchronize the tr iac/relay 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 mo de automatically. Figure 6 Test mode RSTB ZC Test enable COMPO ONON ON ONOFF * ** (Triac) *&**:flash 3 times at 2Hz rate for 2641;for 2642,No flash >0.34s 10s 40s warm up time <3s 1.3s 2s 1.3s 1.3s 2s 1.3s >32s Relay 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 VCC 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 figure 7. If the chip is overridden to ON and there is no further override operation, it will return to AUTO automatically aft er an internal preset ON time duration has elapsed. This override ON time duration is set to 5 hours, refer to fig 7. The PT8A2641/5/7 will flash on output pin when changing 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. But PT8A2642//6/8 does no flash at the same condition. However, if the AUTO mode is changed by switching the MODE switch output will not flash. *&**:flash 3 times at 2Hz rate for 2641/5/7;for 2642/6/8,No flash
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Timing Diagram Application Circuits Typical application circuit of two wires PIR detector C1 0 0 .3 3 U/6 30 V 2 0K 1 2 TRIAC R6 1M R1 2 2 2K R8 4 30 K R4 2 2K 5 6K R1 4 6 8/2 W
1 N41 4 8
1 N40 0 7
1 N62 6 3
D S G 6 .2 V 1 0UF/1 6 V R1 11M R1 0 R1 3 CDS OFF AUTO SW2 MODE ON LAMP 2 0~1 0 0W SW1 ON/OFF OVERRIDE AC 1 1 0V~2 30 V R1 5 1 5K VCC VCC C 1 20 p VSS1 TRIAC2 OSCD3 OSCS4 ZC5 CDS6 MODE7 VDD8 RSTB 10 VEE 9 OP2N 15 OP1P 11 OP1N 12 OP1O 13 OP2P 14 OP2O 16 CDSO COMPO PT8 A2 6 41 /5 /7 Note: 1. Adjust R10 to fit various CDS. 2. Change C7 to obtain the desired adjusting range of output duration. 3. Change the value of C10 to 0.22uf/630V for AC 220V application. ZC RELAY TRIAC TDZT TDZR ZC TTPW 7*TTPW TTPW TDZT
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Typical application circuit of three wires PIR detector C1 1 0 .68 U/4 00V R1 2 R1 1 1M 2 2K 4 30K R4 2 2K 3 60k 5 6K 6 8/2 W R7 2 .4MD4
1 N414 8
1 N400 7
D S G 5 .6V R1 0 2M C1 0 1 0UF/1 6 V R1 4 5 6K R1 3 CDS O FFA U T O SW2 MODE ON LAMP 2 0~1 0 0W SW1 ON/OFF OVERRIDE AC 11 0V~2 30V 2 4V 2 4V 9 014K1 D1 IN4 0 01 nature live R1 5 1M R1 6 VCC VCC relay 15m A VSS1 RELAY2 OSCD3 OSCS4 ZC5 CDS6 MODE7 VDD8 RSTB 10 VEE 9 OP2N 15 OP1P 11 OP1N 12 OP1O 13 OP2P 14 OP2O 16 COMPO CDSO PT8 A2 6 42/6 /8 Note: 1.Adjust R13 to fit various CDS. 2.Change C6 to obtain the desired adjusting range of output duration. 3. RSTB pin need a capacitance 104 for PT8A2642 application
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch Mechanical Information 16-Pin DIP SYMBOL Min Max A 3.71 4.31 A1 0.51 A2 3.20 3.60 B 0.38 0.57 c 0.20 0.36 D 18.80 19.20 E 6.20 6.60 E1 7.32 7.92 e L 3.00 3.60 E2 8.40 9.00 PKG. DIMENSIONS(MM)
1.52 BSC
2.54 BSCNote:
1) Controlling dimensions in millimeters. 2) Ref: JEDEC MS-001D/BB
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch 16-Pin SOIC SYMBOL MIN MAX A 1.35 1.75 A1 0.10 0.25 A2 1.35 1.55 b 0.33 0.51 c 0.17 0.25 D 9.80 10.20 E 3.80 4.00 E1 5.80 6.20 e L 0.40 1.27 θ 0° 8° PKG. DIMENSIONS(MM)
1.27 BSC
Note: 1) Controlling dimensions in millimeters. 2) Ref: JEDEC MS-012E/AC
12-07-0006 PT0192-3 07/06/12 PT8A2641-2642/2645-2648 PIR Sensor Light Switch
Ordering Information
Part Number Package code Package PT8A2641PE P Lead free 16-Pin DIP PT8A2641WE W Lead free 16-Pin SOIC PT8A2642PE P Lead free 16-Pin DIP PT8A2642WE W Lead free 16-Pin SOIC PT8A2645PE* P Lead free 16-Pin DIP PT8A2645WE* W Lead free 16-Pin SOIC PT8A2646PE* P Lead free 16-Pin DIP PT8A2646WE* W Lead free 16-Pin SOIC PT8A2647PE* P Lead free 16-Pin DIP PT8A2647WE* W Lead free 16-Pin SOIC PT8A2648PE P Lead free 16-Pin DIP PT8A2648WE W Lead free 16-Pin SOIC Note: E = Pb-free and Green Adding X Suffix= Tape/Reel *Contact Pericom for availability. Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com Pericom 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 does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom.