
Data Sheet
PT8A2611/2621
PIR Sensor Light Switch Controller
PT0091(11/03)
Ver:3
1
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Features
2-stage operational amplifier as filter
Built-in noise rejection circuit
On-chip regulator
Override function (PT8A2621 only)
Synchronous with AC 220V/50Hz and 110V/60Hz
Pulse output (PT8A2611) for TRIAC drive or
level output (PT8A2621) 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: 80礎
Package:16-pin DIP and 16-pin SOP
Applications
Energy saving auto-switch in Garden, kitchen,
bathroom, corridor, storage or yard
Auto light in meeting room
General Description
The PT8A2611 and PT8A2621 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.
Block Diagram
OP2O
OP2N
OP2P
OP1O
OP1P
OP1N
OSCD
OSCS
ZC
MODE
CDS
RST
RELAY
(for 2621 only)
TRIAC
(for 2611 only)
Comparator
latch circuit
Mode and CDS
control circuit
Control
circuit
Voltage
divider
Regulator
delay
oscillator
System
oscillator
Counter
circuit
Delay
circuit
Zero cross
debounce
Output circuit
_
+
_
V
EE
(Internal CDS
feedback,
for 2611 only)
Override
CDS feedback
Output
PT8A2611
No function
Internal
TRIAC
PT8A2621
Twice
With external
RELAY
components
(see Fig. 10,
D9 and R15)
Part Number
Package
PT8A2611P / PT8A2621P
16 - Pin PDIP
PT8A2611W / PT8A2621W
16 - Pin SOP
PT8A2611DE / PT8A2621DE
Die Form
Ordering Information
Function Comparison