ETC PT8A2620

Data Sheet
PT8A2620
PIR Sensor Light Switch Controller
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Features
General Description
• 2-stage operational amplifier for filter
The PT8A2620 is a CMOS mixed signal LSI designed
for low cost applications using PIR as motion sensor.
• CDS to disable output during daytime
• Timings are fully adjustable with external RC
The PIR sensor detects infrared power variations
components
caused by motion of a human body and transfer to a
• High level output for relay and triac drive with
voltage variation. If the PIR output voltage variation
optical-coupler
conforms to criteria, the lamp is turned on for an
• Built-in noise rejection circuit
adjustable duration. CDS can enable or disable output
• On-chip regulator
with external voltage divider.
• Force on function
Applications
• Both AC and DC operating
• Operating voltage: 5V
• Energy saving auto-switch in Garden, kitchen,
bathroom, corridor, storage or yard
• Few external components
Ordering Information
Pa r t Nu m b er
Pa ck a ge
PT8A2620P
16 - Pin PDIP
PT8A2620W
16 - Pin SOP
Block Diagram
VCC
Regulator
CDS
VEE
OP1O
OP1P
OP1N
OP2O
OP2N
OP2P
RELAY
+
_
OP1
VCP
+
OP2
POR
ON
+
&
VCN
RST
+
-
HT
PWD
GND
PT0119(03/03)
Control
Circuit
Comparator
1
Ver:2
Data Sheet
PT8A2620
PIR Sensor Light Switch Controller
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Pin Configuration
PT8A2620P/W
OP1P
OPIN
OP1O
OP2O
OP2N
OP2P
RST
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VEE
ON
POR
HT
PWD
VCC
RELAY
CDS
Top view
Pin Description
P in
Na me
Typ e
Descr ip t ion
1
OP1P
I
Non-inverted input of first operational amplifier, connected directly to source of PIR sensor
2
OP1N
I
Inverted input of first operational amplifier
3
OP1O
O
Output of first operational amplifier
4
OP2O
O
Output of second operational amplifier
5
OP2N
I
Inverted input of second operational amplifier
6
OP2P
I
Non-inverted input of second operational amplifier. Internal bias on 1.8V default.
7
RST
I
Reset input, active low.
8
GND
9
CDS
I
Schmitt, connected to a CDS voltage divider for daytime/night auto-detection. Low input to
this pin can disable PIR input. CDS should be connected to VCC when not using this function.
10
RELAY
O
RELAY drive output through an external NPN transistor, active high. The output active
duration is controlled by the HT pin
11
VCC
Power
12
PWD
I/O
Schmitt input/open drain output, pulse width detection*
13
HT
I/O
Schmitt input/open drain output, hold time, external RC to set output ON time duration.
Use a VR to make variable ON time.
14
POR
I
Power on reset, reset the chip in about 40s after power on with an external RC.
15
ON
I
Schmitt, force on control input, active low.
16
VEE
O
Internal voltage regulator output, 3.6V with respect to ground. Connected to the drain of
PIR sensor
Ground Ground
Power supply
* An active motion must meet certain condition. The chip transfers motion to pulse width signal, so an active motion must
meet a preset pulse width. Pulse width is adjustable by external RC.
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Data Sheet
PT8A2620
PIR Sensor Light Switch Controller
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Force On Function
Functional description
PT8A2620
&
Pulse width detection (PWD) or Noise rejection circuit
&
Pulse width detection can be used to filter the noise in order to
prevent error trigger from the system. The default criteria of
the width must be more than 400ms which can be set with an
external RC.
ON
POR
RST
Hold time (HT)
Hold time, in other word, the output active duration, it can be
set with an external RC. One various resistor can be used to
changed the related output duration.
Power on Reset (POR)
The external PIR sensor requires a period of up to 40 seconds
to stabilize, so a power on reset circuit is required to ensure
proper operations. During this power on reset period, the lamp
is on to indicate proper operation.
Force on function
The IC can force the controlled lamp to on state by turning off
the power supply for a brief period of time. During this brief
power interruption, the power to the IC must be maintained.
Shown in the schematic, with ON input discharged to low
while RST maintains at high, the lamp output can be set to on
until a RST input is low (longer period of power down). This
feature may cause not intended lamp on situation during brief
power interruption. Tie ON to VCC to disable this feature.
Retrigger
If another PIR signal is attained with valid duration, the circuit
will be retriggered, and the hold time will be restarted from
this time.
Trigger Timing
RST
CDS
+trigger level
-trigger level
Comparator
Input
Comparator
Output
An active pulse width
PWD
Threshold
Threshold
HT
Hold
time
ON
power on reset
time 40s
POR
Threshold
RELAY
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Data Sheet
PT8A2620
PIR Sensor Light Switch Controller
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
Note:
Stresses greater than those listed under MAXIMUM
o
o
Storage Temperature ...................................................... -40 C to +125 C
RATINGS may cause permanent damage to the
Supply Voltage to Ground Potential (Inputs & VCC Only) .... -0.3 to +6.0V
device. This is a stress rating only and functional
Supply Voltage to Ground Potential (Outputs & D/O Only) -0.3 to +6.0V operation of the device at these or any other condiDC Input Voltage ................................................................ -0.3 to +6.0V tions above those indicated in the operational secDC Output Current ........................................................................ 20mA tions of this specification is not implied. Exposure
Power Dissipation ....................................................................... 500mW to absolute maximum rating conditions for extended periods may affect reliability.
Recommended Operation Conditions
Sym
Descr ip t ion
Min
Typ
Ma x
Un it s
VCC
Supply Voltage
4.75
5.0
6.0
V
TA
Operation Temperature
-25
25
70
O
C
DC Electrical Characteristics
Sym
IIH
Descr ip t ion
Test C on d it ion s
Input high leakage current
(POR, CDS, ON)
Input low leakage current
(POR, CDS, ON)
OUTPUT Source Current (RELAY)
VOH = 4.5V
OUTPUT Sink Current (HT)
IOL
Ma x
Un it s
-1
-
1
µΑ
-6
-
-1
µΑ
-1
-
1
µΑ
-15
-
-8
µΑ
-10
-
-
mA
30
-
-
mA
10
-
-
mA
5
-
-
mA
VIL = 0.5V
Input low leakage current (RST)
IOH
Typ
VIH = 4.5V
Input high leakage current (RST)
IIL
Min
VOL = 0.5V
OUTPUT Sink Current (PWD)
OUTPUT Sink Current (RELAY)
VTH1
"H" Transfer Voltage
(POR, CDS, PWD, HT)
-
3.0
3.3
3.6
V
VTL1
"L" Transfer Voltage
(POR, CDS, PWD, HT)
-
1.4
1.7
2.0
V
VTH2
"H" Transfer Voltage (ON)
-
2.7
3.0
3.3
V
VTL2
"L" Transfer Voltage (ON)
-
1.6
1.9
2.2
V
VTH3
"H" Transfer Voltage (RST)
-
2.8
3.1
3.4
V
VTL3
"L" Transfer Voltage (RST)
-
1.4
1.7
2.0
V
Note: These specifications apply for VCC = 5.0V and -25OC ≤ TA ≤ 70OC, unless otherwise specified.
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Data Sheet
PT8A2620
PIR Sensor Light Switch Controller
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AC Electrical Characteristics
Voltage Regulator
Sym
Descr ip t ion
Test C on d it ion s
Min
Typ
Ma x
Un it s
VEE
Regulator Output Voltage
No load
3.2
3.6
4.0
V
VOP2P
Noninverting input of OP2
No load
1.5
-
2.0
V
∆VΟ
Line Regulation
4.5V ≤ VCC ≤ 5.5V, IL = 1mA
-
-
100
mV
∆VLDR
Load Regulation
VCC = 5V, 0.5mA ≤ IL ≤ 2mA
-
-
30
mV
IL
Regulator Output Current
VCC = 5V
4
-
-
mA
Operational Amplifier and Window Comparator
Sym
Descr ip t ion
Test C on d it ion s
Min
Typ
Ma x
Un it s
BW
3dB Bandwidth
-
10
-
-
kHz
VCC = 5V
1.9
2.05
2.2
V
VCC = 5V
1.4
1.55
1.7
V
VTH
Windows Comparator Threshold
VTL
Power Dissipation
Sym
Descr ip t ion
Test C on d it ion s
Min
Typ
Ma x
Un it s
ICC
Power Supply Current
VCC = 5V,
other input pins = GND,
all outputs float
-
-
200
µA
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Data Sheet
PT8A2620
PIR Sensor Light Switch Controller
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Application Circuit of PT8A2620
1M
R9
BLACK
S1
C4
0.68UF/400V
LIVE
56/1W
SW SPST
D5
IN4007
CR3
1N4749
C6
220uF/10V
1N5231B
C5
RED
100UF/35V
R13
D4
1N4007
LAMP
CR2
1N4749
NATURE
WHITE
R20
*
150K
C1
104
R11 1M
Force on
R2
4M
10uF/10V
D1
1N4148
16
V EE
OP1P
15
ON
OP1N
14
POR
OP1O
13
HT
OP2O
12
PWD
OP2N
OP2P
R17
VCC
11
560K
V CC
RELAY
10
RELAY
C14
223
9
R7
100K
D2
CDS
R3
RST
GND
VCC
C12
R14
PT8A2620
100UF/10V C7
Warm up 40s
R6
100K
C3
203
R16 56K
D S G
SD6222
R18 680K
R1
VCC
C8
C16
100UF
24V
RELAY
2.2K
Q1
9014
Turn S1 on/off once to enter chip into force on state.
Exitting force on must power off a period
220uF/10V
C2
CR1
5.1V
S
R4
*
VCC
2K
D3
1N4148
S2
AC 220V
OUTSIDE
R12
24V
R8
1
203
2
C10
22K
22UF/10V
R15
3
R10 1M
4
C9
203
5
22K
22UF/10V
C11
6
7
8
R19
VCC
C13
10UF/10V
10K
C15
47UF/10V
1N4148
R5
CDS
PT0119(03/03)
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Data Sheet
PT8A2620
PIR Sensor Light Switch Controller
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Notes
Pericom Technology Inc.
Email: [email protected]
Web Site: www.pti.com.cn, www.pti-ic.com
China:
No. 20 Building, 3/F, 481 Guiping Road, Shanghai, 200233, China
Tel: (86)-21-6485 0576
Fax: (86)-21-6485 2181
Asia Pacific:
Unit 1517, 15/F, Chevalier Commercial Centre, 8 Wang Hoi Rd, Kowloon Bay, Hongkong
Tel: (852)-2243 3660
Fax: (852)- 2243 3667
U.S.A.:
2380 Bering Drive, San Jose, California 95131, USA
Tel: (1)-408-435 0800
Fax: (1)-408-435 1100
Pericom Technology Incorporation reserves the right to make changes to its products or specifications at any time, without notice, in order to
improve design or performance and to supply the best possible product. Pericom Technology does not assume any responsibility for use of any
circuitry described other than the circuitry embodied in Pericom Technology product. The company makes no representations that circuitry
described herein is free from patent infringement or other rights, of Pericom Technology Incorporation.
PT0119(03/03)
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Ver:2