PT8A261 Datasheet, PDF (1/13 Pages) Pericom Semiconductor Corporation – PIR Sensor Light Switch Controller

PT8A261P/261W/262P/262W
PIR Sensor Light Switch Controller
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Features
• 2-stage operational amplifier as filter
• Built-in noise rejection circuit
• On-chip regulator
• Override function
• Synchronous with AC 220V/50Hz and 110V/60Hz
• Pulse output (PT8A261) for TRIAC drive or
level output (PT8A262) for relay drive
• CDS to enable/disable output
• Adjustable output on time duration
• ON/AUTO/OFF selectable by MODE pin
• Auto-reset if the ZC signal disappears over 3
seconds
• 40 seconds warm-up
• Quick check mode for initial installation
• Operating voltage: 5V
• Stand-by current: 80µA
• Package:16-pin DIP (261P/262P) and 16-pin SOP
(261W/262W)
General Description
The PT8A261 and PT8A262 are low power mixed
signal CMOS LSI designed for the automatic lamp
control using PIR sensor as motion detector.
With on chip noise filter and voltage regulator, the IC
provides stable operations throughout temperature
range. CDS input to disable day time operation is
desired.
Applications
• Energy saving auto-switch in Garden, kitchen,
bathroom, corridor, storage or yard
• Auto light in meeting room
Block Diagram
Figure 1
OP2O
OP2N
_
OP2P
+
OP1O
OP1P
+
_
OP1N
V_EE
OSCD
OSCS
Comparator
Voltage
divider
Regulator
latch circuit
Control
circuit
Mode and CDS
control circuit
Output circuit
MODE
CDS
RELAY
(for 262 only)
TRIAC
(for 261 only)
delay
Delay
RST
oscillator
circuit
System
oscillator
Counter
circuit
Zero cross
debounce
ZC