LP8072

LP8072 PIR CONTROLLER LP8072 GENERAL DESCRIPTION LP8072 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, LP8072 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. LP8072 PIN DESCRIPTION Pin No. 1 2 3 4 5 6 Pin Name UOU1 NII 1 II 1 VREF GND TB I/O Description First stage OP amp output First stage OP amp positive input First stage OP amp negative input Stable reference voltage System ground 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) For testing only 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: 1...