WT8072 Weltrend, WT8072 Datasheet

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WT8072

Manufacturer Part Number
WT8072
Description
Manufacturer
Weltrend
Datasheet
GENERAL DESCRIPTION
WT 8072 is a PIR (passive infra-red) controller, using analog mixing digital design technique and
manufactures by CMOS process which can either drive TRIAC or RELAY depending on users' choice.
With special noise immunity technique, WT8072 is the most stable PIR controller you can find on the
market. More than this, there are few components needed in its application circuit which can reduce
material cost and increase competitive.
FEATURES
*HIGH NOISE IMMUNITY.
*DRIVE EITHER RELAY OR TRIAC.
*ADJUSTABLE LIGHT ON DURATION.
*TRIAC CAN BE EITHER SHUNT OR SERIAL CONNECTED.
*PIR INPUT.
*CDS INPUT.
PIN CONFIGURATION
Weltrend Semiconductor, Inc.
PIN DESCRIPTION
Pin No. Pin Name I/O
1
2
3
4
5
6
7
QTEST
UOU1
NII 1
II 1
VREF
GND
TB

 
  
 


   

First stage OP amp output
First stage OP amp positive input
First stage OP amp negative input
Stable reference voltage
System ground
Time base for 1. The delay time of receiving PIR singnal to sent a puls to
trigger TRIAC or a high signal to trigger relay.
The delay time = R x C x 32.
The PIR signal patented and accepted only if the signal cycle greater than R
x C x 768 .When state of relay or TRIAC is changing form active into
inactive mode. It takes more than R x C x 4069, then system is able to
receive PIR signal again.
2.The flash cycle show the beginning of auto mode.
Note: Width of TRIAC pulse = R x C x 2.
Flash cycle: R x C x 32768
10 K < R < 1M Ohm
100pF < C < 0.1 Uf (Reference Diagram 1)
For testing only


 
 
   

 
  

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Description
PIR CONTROLLER
WT8072

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WT8072 Summary of contents

Page 1

... CMOS process which can either drive TRIAC or RELAY depending on users' choice. With special noise immunity technique, WT8072 is the most stable PIR controller you can find on the market. More than this, there are few components needed in its application circuit which can reduce material cost and increase competitive ...

Page 2

... Detect zero cross of AC line under remote mode function. 13 VDD Operation voltage: 5V, stand by current: 1mA nd 14 II2 NII2 UOU2 2 DIAGRAM 1, 2               Weltrend Semiconductor, Inc. C: 100uF< C < 0.1 uF stage OP amp negative input stage OP amp positive input stage OP amp output  Page 3 WT8072 PIR CONTROLLER (Reference Diagram 2) ...

Page 3

... TRIAC SINK CURRENT Itsource TRIAC SOURCE CURRENT Weltrend Semiconductor, Inc. SYMBOL Vdd-Vss Top Condition 1.8mA, TRIAC 2.5mA, RELAY Vdd>4.2V OUTPUT OPERATING SOURCE C=0.001uF R=4.7K-1M C=0.01uF R=4.7K-1M C=100uF R=4.7K-1M C=0.1uF R=4.7K-1M 18.8V: RELAY ON 13.1V: RELAY OFF Page 4 WT8072 PIR CONTROLLER VALUE Units 5.6 V -0.3-5.6 V 0-70 C -65-150 C Min. Typ. Max. Unit 4.2 5 5.5 V 0.9 1.0 1 ...

Page 4

... AUTO LIGHT SYSTEM FOR GARDEN, GARAGE, HALLWAY, STAIRCASE, PORCH, BATHROM, AND ETC. AUTO SWITCH FOR VENTILATION FAN. AUTO NOTICE SYSTEM FOR OFFICE, STORAGE, AND ETC. ORDERING INFORMATION Ordering Number WT8072 P-DIP 16L WT8072H CHIP FORM Weltrend Semiconductor, Inc. Package Type Page 5 WT8072 PIR CONTROLLER ...

Page 5

... Weltrend Semiconductor, Inc. PIR CONTROLLER Page 6 WT8072 ...

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