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| WT8072 PIR CONTROLLER GENERAL DESCRIPTION WT 8072 is a PIR (passive infra-red) controller, using analog mixing digital design technique and manufactures by CMOS process which can either drive TRIAC or RELAY depending on users' choice. With special noise immunity technique, WT8072 is the most stable PIR controller you can find on the market. More than this, there are few components needed in its application circuit which can reduce material cost and increase competitive. FEATURES *HIGH NOISE IMMUNITY. *DRIVE EITHER RELAY OR TRIAC. *ADJUSTABLE LIGHT ON DURATION. *TRIAC CAN BE EITHER SHUNT OR SERIAL CONNECTED. *PIR INPUT. *CDS INPUT. PIN CONFIGURATION PIN DESCRIPTION Pin No. 1 2 3 4 5 6 Pin Name I/O Description UOU1 First stage OP amp output NII 1 First stage OP amp positive input II 1 First stage OP amp negative input VREF Stable reference voltage GND System ground TB Time base for 1. The delay time of receiving PIR singnal to sent a puls to trigger TRIAC or a high signal to trigger relay. The delay time = R x C x 32. The PIR signal patented and accepted only if the signal cycle greater than R x C x 768 .When state of relay or TRIAC is changing form active into inactive mode. It takes more than R x C x 4069, then system is able to receive PIR signal again. 2.The flash cycle show the beginning of auto mode. Note: Width of TRIAC pulse = R x C x 2. Flash cycle: R x C x 32768 10 K < R < 1M Ohm 100pF < C < 0.1 Uf (Reference Diagram 1) QTEST For testing only 7 Weltrend Semiconductor, Inc. Page 2 WT8072 PIR CONTROLLER 8 TCI To set up the timing of how long Triac or relay is active. During the period, if the system receives the PIR signal, then it restarts counting the timing again. The range for R: 10K < R < 1M Ohm C: 100uF< C < 0.1 uF (Reference Diagram 2) Connected to a CDS for inhibiting relay or TRIAC being triggered. If TRIAC or relay has already being triggered by PIR signal and turned into active mode, then CDS can not inhibit PIR again. To trigger TRIAC, active low Sink current: 15 mA max. To drive relay, active high Sink current: 10 mA max. Source current: 10 mA max. Detect zero cross of AC line under remote mode function. Operation voltage: 5V, stand by current: 1mA nd 2 stage OP amp negative input nd 2 stage OP amp positive input nd 2 stage OP amp output 9 10 11 12 13 14 15 16 CDS TRIAC RELAY ZCD VDD II2 NII2 UOU2 DIAGRAM 1, 2 Weltrend Semiconductor, Inc. Page 3 WT8072 PIR CONTROLLER Absolute Maximum Ratings Parameter POWER SUPPLY Vdd WITH REPECT TO Vss VOLTAGE ON ANY PIN OPERATING TEMPERATURE STORAGE TEMPERATURE SYMBOL Vdd-Vss Top VALUE 5.6 -0.3-5.6 0-70 -65-150 Units V V C C ELECTRICAL CHARACTERISTICS Symbol Parameter Vdd SUPPLY VOLTAGE Ist STANDY CURRENT Idd OPERATING CURRENT Vref Iref STABLE VOLTAGE SOURCE CURRENT OF Vref RIPPLE OF Vref INPUT AND OUTPUT REGULATION OF Vref TIME BASE OPERATING FREQUENCY CDS OPERATING TRIGGER Condition Min. 4.2 0.9 1.8 3.0 200 Typ. 5 1.0 3.2 Max. 5.5 1.2 2.5 3.4 0.5 0.3% 15 1.3 0.6 2.6 9 11.6 0.03 4.6 0.08 37.8 16 1.7 0.9 3.5 10.4 13 17 2.1 1.1 4.4 17.4 21 9.3 1290 14.9 11170 5 5 18.8 15 50 mA mA V mA uA Unit V mA mA V uA mV KHZ V V uA mA mA Sec. 1.8mA, TRIAC 2.5mA, RELAY Vdd>4.2V Ftb Vt+ VtCDS OPREATING TRIGGER Icds CDS SOURCE CURRENT Isource CDS OUTPUT SOURCE CURRENT Isink CDS OUTPUT SINK CURRENT Tout1 TIMER DURATION OF OUT 1 C=0.001uF R=4.7K-1M C=0.01uF R=4.7K-1M C=100uF R=4.7K-1M C=0.1uF R=4.7K-1M Irs RELAY SOURCE CURRENT Irsink RELAY SINK CURRENT Vro RELAY OPERATING VOLTAGE 18.8V: RELAY ON 13.1V: RELAY OFF Itsink TRIAC SINK CURRENT Itsource TRIAC SOURCE CURRENT 13.1 Weltrend Semiconductor, Inc. Page 4 WT8072 PIR CONTROLLER TYPICAL APPLICATION HOME SECURITY SYSTEM. AUTO LIGHT SYSTEM FOR GARDEN, GARAGE, HALLWAY, STAIRCASE, PORCH, BATHROM, AND ETC. AUTO SWITCH FOR VENTILATION FAN. AUTO NOTICE SYSTEM FOR OFFICE, STORAGE, AND ETC. ORDERING INFORMATION Ordering Number WT8072 WT8072H Package Type P-DIP 16L CHIP FORM Weltrend Semiconductor, Inc. Page 5 WT8072 PIR CONTROLLER Weltrend Semiconductor, Inc. Page 6 |
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