PT8A2651WEX
PT8A2651WEX Datasheet
PT8A2651
| Part | Datasheet |
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PT8A2651WEX |
PT8A2651WEX (pdf) |
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PT8A2651WE |
PT8A2651WE |
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| ||||||||||||||||||||||||||||||||||||||| • 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 PT8A2651 PIR Sensor Light Switch Controller 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. Pin Configuration 12-07-0006 PT0219-1 07/06/12 1 |||||||||||||||||||||||||||| Pin Description PT8A2651 PIR Sensor Light Switch Controller Pin No. 1 2 3 4 5 Pin Name VSS TRIAC OSCD OSCS MODE RSTB OP1P OP1N OP1O OP2P OP2N OP2O Pin Description Ground TRIAC drive to output two pulses, active positive pulse. I/O Output timing oscillator. with an external RC to adjust output duration. System oscillator. with an external RC to set the system frequency. The system frequency =16KHz for normal application. Schmitt input for AC zero crossing detection 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. Operating mode selection input: VDD TRIAC is always ON VSS TRIAC is always OFF Open Auto detection, outputs 31.25Hz square wave Positive power supply Regulated voltage output The output voltage is about 3.6V with respect to VSS. Chip reset input, active low Non-inverting input of OP1 Ordering Information Ordering No. PT8A2651WE Note E = Pb-free Adding X Suffix= Tape/Reel Package Code W PKG. DIMENSIONS MM SYMBOL MIN Package Lead free SOIC-16 Pericom Semiconductor Corporation 1-800-435-2336 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. 12-07-0006 PT0219-1 07/06/12 10 |
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