WT8072H

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 signa...