Light Switch. PT8A2645 Datasheet

PT8A2645 Switch. Datasheet pdf. Equivalent

PT8A2645 Datasheet
Recommendation PT8A2645 Datasheet
Part PT8A2645
Description PIR Sensor Light Switch
Feature PT8A2645; ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||.
Manufacture Pericom Technology
Datasheet
Download PT8A2645 Datasheet




Pericom Technology PT8A2645
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Product Features
Operating voltage: 5V (Typ.)
Average supply current: 120µA (Typ.)
2 stage op-amp for filter.
Build-in noise rejection circuit.
On-chip regulator.
Adjustable output duration
Override function.
ON/AUTO/OFF selectable by MODE pin
Apply to AC 220V/50Hz and 110V/60Hz.
Auto-reset if the ZC signal disappears over 3
seconds
Output pulse (PT8A2641/5/7) to drive triac or
output level (PT8A2642/6/8) to drive relay.
CDS to enable/disable output.
40 second warm-up.
Quick check mode for installation.
PT8A2641-2642/2645-2648
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PIR Sensor Light Switch
Product Description
The PT8A264X is a CMOS LSI chip designed
for use in automatic PIR lamp control. It can operate
with a 2-wire configuration for triac applications or
with a 3-wire configuration for relay applications.
The chip is equipped with operational amplifiers, a
comparator, timer, a zero crossing detector, control
circuit, a voltage regulator, a system oscillator, and
an output timing oscillator.
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 is turned on with an
adjustable duration. The PT8A264X offers three
operating modes (ON, AUTO, OFF) which can be set
through the MODE pin. While the chip is working in
the AUTO mode the user can override it and switch
to the quickly install mode, or manual ON mode, or
return to the AUTO mode by switching the power
switch.
Block Diagram
Figure 1 Block Diagram
OP2O
OP2N
OP2P
_
+
OP1O
OP1P
OP1N
VEE
+
_
OSCD
OSCS
Comparator
Voltage
divider
Regulator
delay
oscillator
System
oscillator
latch circuit
Control
circuit
Delay
circuit
Frequency
divider
Mode and CDS
control circuit
Output
circuit
Zero cross
debounce
MODE
CDS
COMPO
CDSO
RSTB
RELAY
TRIAC
GND
Vcc
ZC
12-07-0006
PT0192-3 07/06/12
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Pericom Technology PT8A2645
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Pin Configuration
GND
TRIAC
OSCD
OSCS
ZC
CDS
MODE
Vcc
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
RSTB
VEE
PT8A2641P/2641W
PT8A2641-2642/2645-2648
PIR Sensor Light Switch
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GND
RELAY
OSCD
OSCS
ZC
CDS
MODE
Vcc
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
RSTB
VEE
PT8A2642P/2642W
GND
TRIAC
OSCD
OSCS
ZC
CDS
MODE
Vcc
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
CDSO
VEE
PT8A2645P/2645W
GND
RELAY
OSCD
OSCS
ZC
CDS
MODE
Vcc
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
CDSO
VEE
PT8A2646P/2646W
GND
TRIAC
OSCD
OSCS
ZC
CDS
MODE
Vcc
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
COMPO
VEE
PT8A2647P/2647W
GND
RELAY
OSCD
OSCS
ZC
CDS
MODE
Vcc
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
COMPO
VEE
PT8A2648P/2648W
12-07-0006
PT0192-3 07/06/12
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Pericom Technology PT8A2645
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Pin Description
PT8A2641-2642/2645-2648
PIR Sensor Light Switch
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Part number
2641 2642 2645 2646 2647 2648 Pin name I/O
Description
1
1
1
1
1
1
GND
I Ground
-
2
-
2
-
2
RELAY
O
RELAY drive output through an external NPN
transistor, active high
2
-
2
-
2
-
TRIAC
O
TRIAC drive to output two negative pulses, active
negative pulse.
Output timing oscillator I/O
3 3 3 3 3 3 OSCD I/O It is connected to an external RC to adjust output
duration.
System oscillator I/O OSCS is connected to an
4 4 4 4 4 4 OSCS I/O external RC to set the system frequency. The
system frequency =16KHz for normal application.
555555
ZC I Schmitt input for AC zero crossing detection
CDS is connected to a CDS voltage divider for
6
6
6
6
6
6
CDS
I
daytime/night auto-detection. Low input to this pin
can disable the PIR input. CDS is a schmitt trigger
input with 5-second input debounce time.
Operating mode selection input:
VCC: TRIAC/RELAY is always ON
7 7 7 7 7 7 MODE I/O GND: TRIAC/RELAY is always OFF
Open: Auto detection, outputs 31.25Hz square
wave
888888
Vcc I Positive power supply
9
9
9
9
9
9
VEE
O
Regulated voltage output The output voltage is
about 3.6V with respect to GND.
10 10
-
-
-
-
RSTB I Chip reset input, active low
- - 10 10 - - CDSO
CDS control circuit output signal, active high
- - - - 10 10 COMPO
output of comparator, active high
11
11
11
11
11
11
OP1P
I Noninverting input of OP1
12 12 12 12 12 12 OP1N I Inverting input of OP1
13 13 13 13 13 13 OP1O O Output of OP1
14
14
14
14
14
14
OP2P
I Noninverting input of OP2, internal 1.8V default.
15 15 15 15 15 15 OP2N I Inverting input of OP2
16 16 16 16 16 16 OP2O O Output of OP2
Note: The active output width of COMPO is inversely proportional to the system frequency.
12-07-0006
PT0192-3 07/06/12
3







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