WT8076N16P1 [ETC]
Passive Infrared (PIR) Controller; 被动红外（ PIR ）控制器
| 型号： | WT8076N16P1 |
| 厂家： | 
ETC |
| 描述： | Passive Infrared (PIR) Controller |
| 文件： | 总8页 (文件大小：51K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
WT8076
Passive Infrared (PIR) Controller
eltrend
Version 1.0 25-May-1995
ÓWeltrend Semiconductor, Inc. All Rights Reserved
GENERAL DESCRIPTION
The WT8076 is a PIR controller IC which integrates amplifier, window detector and light control
functions. The light can be controlled by a Relay or Triac with adjustable delay time. A CDS interface is
provided to sense day time and night time. A walk-test fuction helps user while setting up the light set.
The line remote control function can switch the light set between auto mode and always-on mode.
FEATURES
· Adjustable detection range
· Adjustable delay time
· CDS interface to differentiate night time and day time
· Walk-test function
· Line remote control to switch auto mode and always on mode
· Relay or Triac output
· High noise immunity
· Low power consumption ( operating 500uA, standby 130uA, Typ. )
PIN ASSIGNMENT
WT8076N16P1
WT8076S16P1
WT8076N18P2
UOU1
NII1
II1
VREF
GND
TB
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
UOU2
NII2
II2
CDS
VDD
ZCD
GND
TB
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VREF
II1
UOU1
NII1
II1
VREF
GND
TB
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
UOU2
NII2
II2
CDS
VDD
ND
WK
ZCD
RELAY
NII1
UOU1
UOU2
NII2
II2
TCI
TRIAC
RELAY
ZCD
RELAY
TRIAC
TCI
VDD
TCI
TRIAC
CDS
Ordering Information
PART No.
PACKAGE
WT8076N16P1
WT8076S16P1
WT8076N18P2
16 Pin P-DIP
16 Pin SOIC
18 Pin P-DIP
1
Weltrend Semiconductor Inc.
2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.5770419
WT8076
Passive Infrared (PIR) Controller
eltrend
PIN DESCRIPTION
Pin No.
Name
Descriptions
N16P1
S16P1
13
14
15
16
1
N18P1
1
2
3
4
5
6
1
2
3
4
5
6
UOU1
NII1
II1
VREF
GND
TB
Output of the first stage OP amplifier.
Non-inverting input of the first stage OP amplifier.
Inverting input of the first stage OP amplifier.
Reference voltage output.
Ground.
2
Time Base. A RC oscillaror is connected on this pin.
Typical frequency is 30kHz.
7
8
3
4
7
8
---
TCI
No connection.
Time control input. A RC oscillator is connected on this
pin. It controls the delay time of the light.
Triac control pin. Active low.
9
10
11
5
6
7
9
10
11
TRIAC
RELAY
ZCD
Relay control pin. Active hight.
Zero-crossing input. It detects the zero-crossing point of
the AC line. The ouput of TRIAC pin is synchronous to this
pin.
*
*
*
*
12
13
WKT
ND
Walk-Test function enable/disable. Internal pull low. The
walt-test function is disbled when this pin is high level.
Night and day detection enable/disable. Internal pull low.
The night-and-day detection is disbled when this pin is
high level.
12
13
8
9
14
15
VDD
CDS
Power supply.
Connect a photo-sensitive resistor to detect night time
and day time. If the input level is lower than 1.2V, it is
day time. If the input level is higher than 1.9V, it is night
time.
14
15
16
10
11
12
16
17
18
II2
NII2
UOU2
Inverting input of the second stage OP amplifier.
Non-inverting input of the second stage OP amplifier.
Output of the second stage OP amplifier.
* WT8076N16P1 and WT8076S16P1 : Walk-Test and Night&Day function is always enabled.
2
Weltrend Semiconductor Inc.
WT8076
Passive Infrared (PIR) Controller
eltrend
BLOCK DIAGRAM
VDD
WT8076
TB
System Clock
WKT
ND
OSC
VDD
CONTROL
LOGIC
ZCD
VDD
TCI
OSC
Counter
RELAY
TRIAC
CDS
Window
CDS
Detector
1.25V
1.95V
3.2V
VREF
REF.
VOLTAGE
Pulse Width
Detector
PIR
NII1
1.6V
II1
UOU1
NII2
II2
UOU2
WT8076 Block Diagram
3
Weltrend Semiconductor Inc.
WT8076
Passive Infrared (PIR) Controller
eltrend
FUNCTIONAL DESCRIPTION
PIR Amplifier
The amplifier has two stages, please see block diagram . The voltage gain and frequency response can
be adjusted by the external resisters and capacitors.
Window Detector
If the amplified PIR signal is between VH (1.95V) and VL (1.25V), the signal is ignored and the output of
the window detector is low level. If the amplified signal is larger than VH or smaller than VL, the output of
the window detector is high level.
Pulse Width Detector
The pulse width detector detects the pulse width of the window detecter's output. If the pulse width is
less than 90ms ( fTB = 30kHz ), this pulse is ignored. If the pulse width is larger than 90ms, it will trigger
the light to turn on.
Light Control
The light is controlled by the RELAY pin or TRIAC pin. The RELAY pin outputs a high level when a valid
pulse is detected. The delay time is determined by the RC on the TCI pin. If another valid pulse
occurs during the delay time, the delay time will be reset. Fig. 1 shows the relationships.
The TRIAC pin is an open drain NMOS output. The turn on angle is about 24O .
1.95V
Signal on
UOU2 Pin
1.25V
<90ms
>90ms
>90ms <90ms
>90ms
Window detector
output
Pulse width
detector output
RELAY pin
delay time
90ms
TRIAC pin
ZCD pin
Figure.1 Timing Relationship
4
Weltrend Semiconductor Inc.
WT8076
Passive Infrared (PIR) Controller
eltrend
CDS Interface
The CDS interface detects the level on the CDS pin. If the level is higher than 1.95V, it is night time.
If the level is lower than 1.25V, it is day time.
Operating Modes
The operating modes of WT8076 are:
(1) Auto mode:
The light will turn on when a valid pulse is detected in the night time.
(2) Always on mode:
If the ND pin is low level, the light is always on in the night time. When it detects day time, the
light will be turn off, and back to auto mode.
If the ND pin is high level, the light is always on.
(3) Walk-test mode:
The walk-test mode is active after the power is on. This mode is same as the auto mode except
the CDS is ignored. That is, the light will be turn on when a valid pulse is detected no matter it is
night time or day time.
Remote Control
To switch auto mode between always on mode, the WT8076 detects the zero crossings of the AC line. If
the line switch OFF and ON one time in 3 seconds, it toggles the auto mode and always on mode.
Time Base
The RC oscillator on the TB pin generates the system clock. The frequency is 30kHz typically (R
=30Kohm, C=1000pF) .
The following parameters are decided by the time base :
(1) Trigger angle of the TRIAC (24O , if time base is 30kHz).
(2) Pulse width (90ms,if time base is 30kHz).
(3) Remote control switch time.
(4) Disable PIR after the light is off.
(5) Total walk-test time.
The RC oscillator on the TCI pin sets the delay time. Figure 2 shows the relationship betwteen delay
time and the R ( C=1000pF).
5
Weltrend Semiconductor Inc.
WT8076
Passive Infrared (PIR) Controller
eltrend
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
Item
supply voltage
Symbol
Ratings
6
Uit
V
VDD
Input Voltage
-0.5 to VDD+0.5
-25 to 70
-65 to 150
500
V
V
IN
Operating Temperature
StorageTemperature
Power Dissipation
OC
OC
mW
T
T
OPR
STG
P
D
Note: Stress above those conditions listed may cause permente damage to the device.
Electrical Characteristics ( VDD=5.0V, TA=25OC )
Item
Operating Voltage
Standby Current
Operating Current
Reference Voltage
Ripple of VREF
Symbol
Test Condition
No load on output.
R=30K,C=1000p
Min
4.5
-
-
3
-
Typ
5
130
500
3.2
-
30
Max
5.5
600
Unit
V
mA
mA
V
mV
kHz
V
DD
DDS
DDO
REF
I
I
V
1000
3.4
0.5
32
Time Base Frequency
28
f
TB
CDS VT+
CDS VT-
TCI Frequency
TRIAC pin Sink Current
RELAY pin Source Current
-
1
-
-
-
1.95
1.25
-
-
-
2.1
-
50k
15
5
V
V
Hz
mA
mA
VT+
VT+
f
TCI
VOL = 1.5V
VOH = 3.5V
I
I
OL
OH
Characteristics of OP Amplifier ( VDD=5.0V, TA=25OC )
Item
Symb
ol
Test Condition
Min
Typ
Max
Unit
Input Bias Current
Input Offset Current
Input Offset Voltage
Output Swing Voltage
Output Source Current
Output Sink Current
Differential Gain
Commom Mode Rejection Ration
Power Supply Rejection Ration
-
-
-
-
-
-
-
-
10
10
5
-
-
-
-
-
-
nA
nA
mV
V
uA
mA
dB
dB
dB
Ibias
Ioffset
Voffset
Vswing
Isource
Isink
Av
CMRR
PSRR
RL=470K
4
7
3.5
-
-
-
-
100
65
80
6
Weltrend Semiconductor Inc.
WT8076
Passive Infrared (PIR) Controller
eltrend
TYPICAL APPLICATION CIRCUIT
WT8076N18P1 Application Circuit For RELAY Output
C12
0.47u/250V
R12
47
FUSE
R9
R10
1M
CDS
L
470K
D1
1N4001
R11
2.4K
R8
C9
R7
Lamp
51K
C10
100u
10V
C11
ZD1
12V
C8
ZD2
5.6V
47u
15K
220u
AC
110V
25V
0.047u
R6
R13
100
560K
D3
1N4148
RELAY
C13
0.047u
250V
C7
18
17
16
15
14
13
12
11
10
47u
UOU2 NII2 II2 CDS VDD ND WKT ZCD RELAY
R14
N
5.6K
WT8076
UOU1 NII1 II1 VREF GND TB
TCI TRIAC
1
2
3
4
5
6
7
8
9
C6
R2
30K
R1
20K
C3
0.1u
R5
C2
1000p
C1
1000p
100u
820K
R4
15K
PIR
C5
33u
R3
47K
C4
0.01u
Note:
(1) To adjust delay time, change R1 value. ( R1=20K, delay time is about 10 sec )
(2) For different CDS, R8 value should be adjusted.
7
Weltrend Semiconductor Inc.
WT8076
Passive Infrared (PIR) Controller
eltrend
WT8076N18P1 Application Circuit For TRIAC Output
CDS
R9
470K
R10
1M
R8
C9
R7
L
51K
C10
100u
10V D1
47u
15K
C8
ZD1
5.6V
TRIAC
0.047u
R6
AC
1N4004
R12
100K
110V
560K
Lamp
C7
18
17
16
15
14
13
12
11
10
47u
R11
C11
UOU2 NII2 II2 CDS VDD ND WKT ZCD RELAY
N
47
0.1u/250V
WT8076
UOU1 NII1 II1 VREF GND TB
TCI TRIAC
1
2
3
4
5
6
7
8
9
R13
330
C6
R2
30K
R1
20K
C3
0.1u
R5
C2
1000p
C1
1000p
100u
820K
R4
15K
PIR
C5
33u
R3
47K
C4
0.01u
Note:
(1) To adjust delay time, change R1 value. ( R1=20K, delay time is about 10 sec )
(2) For different CDS, R8 value should be adjusted.
8
Weltrend Semiconductor Inc.
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