
Data Sheet
PT8A2612
PIR Sensor Light Switch Controller
PT0122(04/03)
Ver:0
1
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Features
2-stage operational amplifier as filter
Built-in noise rejection circuit
On-chip regulator
Override function by twice turn-off and -on of AC
power
4s soft start and 1 minutes soft stop by three
steps with 5 minutes hold time at f
OSCD = 1Hz
40 second warm-up
Turn on 25% during night without motion
Mode pin to set test mode, disable dimmer or
auto mode
Auto-reset if the ZC signal disappears over 3
seconds
Quickly check mode for installation
Synchronous with AC 220V/50Hz and 110V/60Hz
Output pulse for triac drive and level for relay
CDS to enable/disable output
Adjustable output on time duration
Operating voltage: 5V
Average supply current: 80A (Typ.)
General Description
The PT8A2612 is a CMOS LSI chip based on 260
base designed for use in automatic PIR lamp control.
It can operate with a 2-wire configuration for triac
applications with dimmer function or 3-wire
configuration for RELAY application.
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 can softly turn on
as the below order, 25% lighteness, 50%, 75% 100%
as well as turn off as reverse order with an adjustable
duration.
The PT8A2612 offers three operating modes (TEST,
AUTO, disable dimmer) which can be set through
the MODE pin. While the chip is working in the AUTO
mode the user can override it and switches to the
quickly check mode, or manual ON mode, or return
to the AUTO mode by switching the power switch.
Applications
Energy saving auto-switch in Garden, kitchen,
bathroom, corridor, storage, and yard
Auto light in Meeting-room
Part Number
Package
PT8A2612P
16 - Pin PDIP
PT8A2612W
16 - Pin SOP
PT8A2612DE
Die Form
Ordering Information