DESCRIPTION

· The PT8A264X is a CMOS LSI chip designed for automatic PIR lamp control, compatible with 2-wire (triac) and 3-wire (relay) configurations.

· It includes operational amplifiers, a comparator, timer, zero crossing detector, control circuit, voltage regulator, system oscillator, and output timing oscillator.

· Detects infrared power variations from human motion, converts to voltage, and controls lamp activation based on predefined criteria.

FEATURES

· Operating voltage: 5V (Typ.)

· Average supply current: 120µA (Typ.)

· Built-in noise rejection circuit and on-chip regulator.

· Adjustable output duration and override function.

· ON/AUTO/OFF modes selectable via MODE pin.

· Compatible with AC 220V/50Hz and 110V/60Hz.

· Auto-reset if zero-crossing signal disappears for over 3 seconds.

· Output pulse (PT8A2641/5/7) for triac or output level (PT8A2642/6/8) for relay.

· CDS for enabling/disabling output.

· 40-second warm-up and quick check mode for installation.

APPLICATIONS

· Automatic PIR lamp control systems.

· Energy-efficient lighting solutions.

· Security lighting with motion detection.