HOLTEK HT761X_09

HT761X
General Purpose PIR Controller
Features
· Operating voltage: 5V~12V
· ON/AUTO/OFF selectable by MODE pin
· Standby current: 100mA (Typ.)
· Override function
· On-chip regulator
· Auto-reset if the ZC signal disappears over 3
seconds
· Adjustable output duration
· 16-pin DIP package
· CDS input
· 40 second warm-up
Applications
· PIR light controllers
· Alarm systems
· Motion detectors
· Auto door bells
General Description
The HT761x 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.
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 HT761x 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 TEST mode, or manual ON mode, or
return to the AUTO mode by switching the power switch.
Its PIR sensor detects infrared power variations induced
by the motion of a human body and transforms it to a
Selection Table
Part No.
ZC Off/On
for Override
Flash on Mde
Auto-change
Override ON
Duration
Comparator
Window
Effective Trigger
Width
HT7610A
HT7610B
2 times
Flash
8 hrs
1
(VDD-VEE)
16
>24ms
HT7611A
HT7611B
1 time
No flash
8 hrs
1
(VDD-VEE)
16
>24ms
Note:
Part numbers suffixed with A are for Relay application while those suffixed with B are for Triac application.
Pin Assignment
V S S
1
1 6
O P 2 O
V S S
1
1 6
O P 2 O
T R IA C
2
1 5
O P 2 N
R E L A Y
2
1 5
O P 2 N
O S C D
3
1 4
O P 2 P
O S C D
3
1 4
O P 2 P
O S C S
4
1 3
O P 1 O
O S C S
4
1 3
O P 1 O
Z C
5
1 2
O P 1 N
Z C
5
1 2
O P 1 N
C D S
6
1 1
O P 1 P
C D S
6
1 1
O P 1 P
M O D E
7
1 0
R S T
M O D E
7
1 0
V D D
8
V E E
V D D
8
9
H T 7 6 1 X B
1 6 D IP -A
T R IA C V E R S IO N
Rev. 1.30
9
R S T
V E E
H T 7 6 1 X A
1 6 D IP -B
R E L A Y V E R S IO N
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October 12, 2009
HT761X
Block Diagram
O P 2 O
O P 2 N
C o m p a ra to r
O P 2 P
O P 1 O
V
O P 1 N
C D S
V S S
V o lta g e
D iv id e r
O P 1 P
M O D E
M o d e & C D S
C ir c u it
L a tc h C ir c u it
V D D
C o n tro l
C ir c u it
D D
R E L A Y
(T R IA C )
O u tp u t C ir c u it
V E E
R e g u la to r
O S C D
D e la y
O s c illa to r
D e la y C ir c u it
O S C S
S y s te m
O s c illa to r
C o u n te r
C ir c u it
R S T
Z e ro C ro s s
D e b o u n c e
Z C
Pin Description
Internal
Connection
Pin Name
I/O
VSS
¾
¾
RELAY
O
CMOS
RELAY drive output through an external NPN transistor, active high.
TRIAC
O
CMOS
TRIAC drive output
The output is a pulse output when active.
OSCD
I/O
PMOS IN
NMOS OUT
Output timing oscillator I/O
It is connected to an external RC to adjust output duration.
OSCS
I/O
PMOS IN
NMOS OUT
System oscillator I/O
OSCS is connected to an external RC to set the system frequency. The
system frequency is at 16kHz for normal application.
ZC
I
CMOS
Input for AC zero crossing detection
CDS
I
CMOS
CDS is connected to a CDS voltage divider for daytime/night
auto-detection. Low input to this pin can disable the PIR input. CDS a
Schmitt Trigger input with 5-second input debounce time.
I
CMOS
Operating mode selection input:
VDD: Output is always ON
VSS: Output is always OFF
Open: Auto detection
VDD
¾
¾
VEE
O
NMOS
RST
I
Pull-High
Chip reset input, active low
OP1P
I
PMOS
Noninverting input of OP1
OP1N
I
PMOS
Inverting input of OP1
OP1O
O
NMOS
Output of OP1
OP2P
I
PMOS
Noninverting input of OP2
OP2N
I
PMOS
Inverting input of OP2
OP2O
O
NMOS
Output of OP2
MODE
Rev. 1.30
Description
Negative power supply, ground
Positive power supply
Regulated voltage output
The output voltage is -4V with respect to VDD.
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October 12, 2009
HT761X
Absolute Maximum Ratings
Supply Voltage .......................................-0.3V to +13V
Storage Temperature ...........................-50°C to 125°C
Input Voltage .............................VSS-0.3V to VDD+0.3V
Operating Temperature ..........................-25°C to 70°C
Zero Crossing Current ................................Max. 300mA
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed
in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
Electrical Characteristics
Symbol
Parameter
Test Condition
VDD
Condition
¾
¾
Min.
Typ.
Max.
Unit
5
9
12
V
VDD
Operating Voltage
VEE
Regulator Output Voltage
12V
VDD-VEE
3.5
4.0
4.5
V
IDD
Operating Current
12V
No load, OSC on
¾
100
350
mA
IOH1
OUTPUT Source Current
(RELAY, TRIAC)
12V
VOH=10.8V
-6
12
¾
mA
IOL1
OUTPUT Sink Current
(RELAY, TRIAC)
12V
VOL=1.2V
40
80
¾
mA
IOL2
VEE Sink Current
12V
VDD-VEE=4V
¾
¾
¾
mA
VIH
²H² Input Voltage
¾
¾
0.8VDD
¾
¾
V
VIL
²L² Input Voltage
¾
¾
¾
¾
0.2VDD
V
VTH1
CDS ²H² Transfer Voltage
12V
¾
6.4
8.0
9.6
V
VTL1
CDS ²L² Transfer Voltage
12V
¾
3.7
4.7
5.6
V
VTH2
ZC ²H² Transfer Voltage
12V
¾
4.7
6.7
8.7
V
VTL2
ZC ²L² Transfer Voltage
12V
¾
1.3
1.8
2.3
V
VOS
OP Amp Input Offset Voltage
12V
No load
¾
10
35
mV
fSYS
System Oscillator Frequency
12V
ROSCS=560kW
COSCS=100pF
12.8
16
19.2
KHz
fd
Delay Oscillator Frequency
12V
ROSCD=560kW
COSCD=100pF
12.8
16
19.2
KHz
AVO
OP Amp Open Loop Gain
12V
No load
60
80
¾
dB
Functional Description
VEE
V
VEE supplies power to the analog front end circuit with a normally stabilized voltage of -4V
with respect to VDD.
R S
5 6 0 k W
OSCS
D D
O S C S
C S
1 0 0 p F
OSCS is a system oscillator input pin. When it is
connected to an external RC, a system frequency of 16kHz can be generated.
System Oscillator
Rev. 1.30
3
October 12, 2009
HT761X
CDS
OSCD
OSCD is an output timing oscillator input pin. It is connected to an external RC to obtain the desired output
turn-on duration. Variable output turn-on durations can
be achieved by selecting various values of RC or using a
variable resistor.
V
PIR
LOW
Day Time
Disabled
HIGH
Night
Enabled
C D S
5 s e c
< 5 s e c
D D
P IR
R
Status
e n a b le
d is a b le
e n a b le
D
O S C D
TD=
C
D
MODE
1
´ 21504
f
MODE is a tristate input pin used to select the operating
mode.
MODE Operating
Status Mode
VDD
ON
Output is always ON:
RELAY outputs high for relay driving.
TRIAC pulse train output is synchronized by ZC for triac driving.
VSS
OFF
Output is always OFF:
RELAY outputs low for relay driving.
TRIAC outputs high for triac driving.
AUTO
Outputs remain in the off state until
activated by a valid PIR input trigger
signal. When working in the AUTO
mode, the chip allows override control by switching the ZC signal.
Output Timing Oscillator
RELAY (TRIAC)
RELAY is an output pin set as a RELAY driving (active
high) output for the HT761xA, or as a TRIAC driving (active low) output for the HT761xB.
The output active duration is controlled by the OSCD oscillating period.
HT761xA
HT761xB
RELAY
TRIAC
OUTPUT
Description
Open
CDS
CDS is a CMOS Schmitt Trigger input structure. It is
used to distinguish between day time and night time.
When the input voltage of CDS is high the PIR input is
enabled. On the other hand, when CDS is low the PIR
input is disabled. The input disable to enable debounce
time is 5 seconds. Connect this pin to VDD when this
function is not used. The CDS input is ignored when the
output is active.
1 0 s
R S T B
4 0 s w a r m - u p tim e
Z C
< 3 s
O F F /O N o n e o r tw o tim e s b y m a s k o p tio n
T e s t
e n a b le
> 0 .3 4 s
C o m p a ra to r
o u tp u t
fla s h 3 tim e s in 1 H z
fla s h o r n o t b y m a s k o p tio n
*
R E L A Y
(T R IA C )
O F F
2 s
* : fla
fla
# : fla
fla
Rev. 1.30
O N
s h
s h
s h
s h
3 tim
o r n
3 tim
o r n
e s a
o t b y
e s a
o t b y
t a
m
t a
m
1 H z
a s k o
2 H z
a s k o
O N
2 s
#
O N
2 s
O N
2 s
2 s
> 3 2 s
ra te
p tio n
ra te
p tio n
4
October 12, 2009
HT761X
ZC
ZC is a CMOS input structure. It receives AC line frequency and generates zero crossing pulses to synchronize the triac driver. By effective ZC signal switching
(switch OFF/ON 1 or 2 times within 3 seconds by mask
option), the chip provides the following additional functions:
V
V C C
D D
R E S T
1 0 0 m F
R S T
C
R S T
· Test mode control
V E E
Within 10 seconds after power-on, effective ZC
switching will force the chip to enter the test mode.
During the test mode, the outputs will be active for a
duration of 2 seconds each time a valid PIR trigger
signal is received. If a time interval exceeds 32 seconds without a valid trigger input, the chip will automatically enter the AUTO mode.
Fig.1 RST Application Example
Power-on Initial
The PIR signal amplifier requires a warm up period after
power-on. The input should be disabled during this period.
· Override control
When the chip is working in an AUTO mode
(MODE=open), the output is activated by a valid PIR
trigger signal and the output active duration is controlled by an OSCD oscillating period. The lamp can
be switched always to ²ON² from the AUTO mode by
either switching the MODE pin to VDD or switching
the ZC signal by an OFF/ON operation of the power
switch (OFF/ON once or twice within 3 seconds by
mask option). The term ²override² refers to the
change of operating mode by switching the power
switch. The chip can be toggled from ON to AUTO by
an override operation. If the chip is overridden to ON
and there is no further override operation, it will automatically return to AUTO after an internal preset ON
time duration has elapsed. This override ON time duration can be set to 4 or 6 or 8 hours by mask option.
The default is 8 hours.
The chip provides a mask option to determine the output flash times (3 times) when changing the operating
mode. It will flash 3 times at a 1Hz rate each time the
chip changes from an AUTO mode to another mode or
flash 3 times at a 2Hz rate when returning to the
AUTO mode. But if the AUTO mode is changed by
switching the MODE switch it will not flash.
In the AUTO mode within the first 10 seconds of
power-on initialization, the chip allows override control
to enter the test mode. After 40 seconds of the initial
time the chip allows override control between ON and
AUTO. It will remain in the warm up period if the total initial time has not elapsed after returning to AUTO.
In case that the ZC signal disappears for more than 3
seconds, the chip will restart the initialization operation.
However, the restart initial time is always 40 seconds
and cannot be extended by adding CRST to the RST pin
as shown in the Fig.1.
Mask Options
The HT761x offers mask options to select the output
flash (3 times) when changing the operating mode. The
chip will flash 3 times at a 1Hz rate each time it changes
from AUTO to another mode and flash 3 times at a 2Hz
rate when it returns to the AUTO mode. However the
chip will not flash if the mode is changed by switching
the MODE switch.
· 4, 6, or 8 hour options to return to AUTO from override
ON. The default is 8 hours.
· Options for effective override: Once or twice Off/On
operation of power switch within 3 seconds. The default is Off/On twice.
· Options for output flash to indicate effective override
operation. The default is to flash.
· Options for effective PIR trigger pulse width: >24ms,
>32ms or >48ms. The default is 24ms.
RST
RST is used to reset the chip. It is internal pull-high and
active low.
The use of CRST can extend the power-on initial time. If
the RST pin is an open circuit (without CRST), the initial
time is the default (40 secs).
O p e r a tin g
M o d e
fla s h
A U T O
fla s h
O N
fla s h
fla s h
A U T O
O N
A U T O
4 , 6 o r 8 h r b y m a s k o p tio n
Z C
ZC Override Timing
Rev. 1.30
5
October 12, 2009
HT761X
· Options for setting the comparator window to be
1
,
16
If the window level fails to be specified the default win1
(VDD-VEE). The preset voltage of
dow is set to
16
VDD-VEE is 4V. The default values of VCP and VCN are
4
therefore 0.25V, (
V ).
16
1
1
or (VDD-VEE).
11.3
9
1
(VDD-VEE).
The default is
16
PIR Amplifier
Second Stage Amplifier
Consult the diagram below for details on the PIR front
end amplifier.
Usually the second stage PIR amplifier is a simple capacitively coupled inverting amplifier with a low pass
configuration. The noninverting input terminal is biased
to the center point of the comparator window and the
output of the second stage amplifier is directly coupled
to the comparator center point.
In the Fig.2 below there are 2 op-amps with different applications. OP1 can be used independently as a first
stage inverting or non-inverting amplifier for the PIR.
V
D D
O P 1 O
O P 1 N
O P 1 P
V
O P 2 O
O P 2 N
In Fig.3 OP2P is directly connected to the comparator
window center, and with the C3 filter it can act as the
R2
, low cutoff
bias for OP2. For this configuration AV =
R1
1
frequency fL=
, high cutoff frequency
2 p R1C1
1
f H=
. By changing the value of R2 the sensitiv2 pR2C2
ity can be varied. C1 and C3 should be of low leakage
types to prevent the DC operating point from changing
due to current leakage.
O P 1
C o m p a ra to r
C P
O P 2
O P 2 P
V
C N
V E E
Each op-amp current consumption is approximately
5mA with the op-amps and comparator¢s working voltage all provided by the regulator.
R e g u la to r
Fig.2 PIR Amplifier
Consult the following diagrams for typical PIR front end
circuit.
As the output of OP2 is directly connected to the input of
the comparator, it is used as a second stage amplifying
device. The non-inverting input of OP2 is connected to
the comparator¢s window center point and can be used
to check this voltage and to provide a bias voltage that is
equal to the center point voltage of the comparator. In
Fig.2 the comparator can have 3 window levels set by
1
1
(VDD-VEE), 2.
(VDD-VEE),
mask option. 1.
16
11.3
1
3. (VDD-VEE).
9
First Stage of PIR Amplifier
Fig.4 shows a typical first stage amplifier. C2 and R2
form a simple low pass filter with cut off frequency at
7Hz. The low frequency response is governed by R1
and C1 with cut-off frequency at 0.33Hz.
AV =
V
O P 2 O
R 1
2 2 k W
fir s t s ta g e
o u tp u t
C 2
0 .0 2 2 m F
C 1
2 2 m F
R 2
1 M W
( R1+ R2 )
R1
D D
R W
O P 2 N
O P 2
R W
O P 2 P
V
D D
R W
C 3
1 0 m F
R W
V E E
Fig.3 Typical Second Stage Amplifier
Rev. 1.30
6
October 12, 2009
HT761X
Fig.4 and Fig.5 are similar but in Fig.5 the input signal of
amplifier is taken from the drain of the PIR. This has
higher gain than that in Fig.4. Since OP1 is a PMOS input VD, it has to be greater than 1.2V for adequate operation.
V E E
C 1 1
2 2 m F
V
R 1 1
2 2 k W
D D
R 1 2
5 1 0 k W
V E E
R 1 3
1 0 0 k W ~ 1 8 0 k W
C 1
2 2 m F
R 1
2 2 k W
V
P IR
G
D
R 2
C 2
S
R 4
5 6 k W
O P 1
C 1 5
1 0 0 m F
V E E
O U T
O P 1
O U T
O P 1
D
G
0 .0 2 2 m F
S
C 1 2
0 .0 4 7
D
O P 1
P IR
1 M W
D D
V
Fig.5 High Gain First Stage
5 6 k W
V E E
Fig. 4 Typical First-Stage PIR
Timing Diagram
R S T
C D S
O u tp u t
E n a b le
5 s e c
+ tr ig g e r le v e l
C o m p a ra to r
In p u t
- tr ig g e r le v e l
C o m p a ra to r
o u tp u t
D e te c t
E n a b le
< 2 4 m s
p o w e r - o n d e la y tim e
4 0 S
> 2 4 m s
(N o te 2 )
(N o te 1 )
1 0 S
te s t e n a b le
T e s t E n a b le
R E L A Y
O N
T R IA C
O N
p u ls e o u tp u t
Note:
(N o te 3 )
The output is activated if the trigger signal conforms to the following criteria:
· More than 3 triggers within 2 seconds
· A trigger signal sustain duration ³ 0.34 secs
· 2 trigger signals within 2 secs with one of the trigger signal sustain ³ 0.16 secs.
The effective comparator output width can be selected to be 24ms or 32ms or 48ms by mask option.
The default is 24ms (system frequency=16kHz).
The output duration is set by an external RC that is connected to the OSCD pin.
Rev. 1.30
7
October 12, 2009
HT761X
Application Circuit
HT761xA Relay Application Circuit
O N /O F F
O V E R R ID E
L P 1
L A M P
***
0 .6 8 m F
3 5 0 V
K 1
4 0 0 2
6 8 /2 P
R E L A Y
3 0 m A
1 M W
4 0 0 2
1 2 V
1 2 V
4 0 0 2
4 0 0 1
8 0 5 0
4 1 4 8
5 6 k W
2 .4 M W
4 .7 k W
*
C D S
1 M W
1 0 0 p F
5 6 0 k W
3 9 0 0 p F **
M O D E
9 V
1
2
3
4
5
6
7
8
O S C D
R L Y
V S S
O P 1 O
O P 2 P
O P 2 N
O P 2 O
H T 7 6 1 X A
O S C S
O P 1 P
O P 1 N
R S T
Z C
V E E
C D S
M O D E
3 0 0 k W
1 0 0 m F
V D D
O N
3 3 0 m F
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
G
3
2 2 m F
S
0 .0 2 m F
1
5 6 k W
D
2
1 M W
0 .0 2 m F
2 2 k W
2 2 m F
P IR
S D 6 2 2
( N ip p o n
C e r a m ic )
2 2 k W
0 .0 2 m F
1 0 m F
1 M W
October 12, 2009
8
Rev. 1.30
A C +
1 1 0 V
A C
4 7 0 m F
Adjust ²*² to fit various CDS.
Note:
Change ²**² to obtain the desired adjusting range of output duration.
Change the value of ²***² to 0.33mF/ 600V for AC 220V application.
A U T O
O F F
HT761X
HT761xB TRIAC Application Circuit
O N /O F F
O V E R R ID E
T R IA C
L P 1
L A M P
6 8 /2 P
0 .1
4 0 0 2
1 M W
4 0 0 2
***
0 .3 3 m F
3 5 0 V
1 0 k W
1 M W
4 0 0 2
3 3 0 m F
2 .4 M W
4 0 0 2
1 2 V
*
1 M W
1 0 0 p F
5 6 0 k W
3 9 0 0 p F **
M O D E
C D S
1
2
3
4
5
6
7
8
O N
1 0 0 m F
H T 7 6 1 X B
V D D
M O D E
C D S
Z C
O S C S
O S C D
T R IA C
V S S
V E E
R S T
O P 1 P
O P 1 N
O P 1 O
O P 2 P
O P 2 N
O P 2 O
3 0 0 k W
1 0 0 m F
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
G
3
1 M W
2 2 m F
S
0 .0 2 m F
1
5 6 k W
D
2
0 .0 2 m F
2 2 k W
2 2 m F
P IR
S D 6 2 2
( N ip p o n
C e r a m ic )
2 2 k W
0 .0 2 m F
1 0 m F
1 M W
October 12, 2009
9
Rev. 1.30
A C +
1 1 0 V
A C
Adjust ²*² to fit various CDS.
Note:
Change ²**² to obtain the desired adjusting range of output duration.
Change the value of ²***² to 0.15mF/ 600V for AC 220V application.
A U T O
O F F
HT761X
Package Information
16-pin DIP (300mil) Outline Dimensions
A
B
A
1 6
9
1
8
B
1 6
9
1
8
H
H
C
C
D
D
G
E
G
E
I
F
I
F
Fig1. Full Lead Packages
Fig2. 1/2 Lead Packages
· MS-001d (see fig1)
Symbol
Dimensions in mil
Min.
Nom.
Max.
A
780
¾
880
B
240
¾
280
C
115
¾
195
D
115
¾
150
E
14
¾
22
F
45
¾
70
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
· MS-001d (see fig2)
Symbol
Rev. 1.30
Dimensions in mil
Min.
Nom.
Max.
A
735
¾
775
B
240
¾
280
C
115
¾
195
D
115
¾
150
E
14
¾
22
F
45
¾
70
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
10
October 12, 2009
HT761X
· MO-095a (see fig2)
Symbol
A
Rev. 1.30
Dimensions in mil
Min.
Nom.
Max.
745
¾
785
B
275
¾
295
C
120
¾
150
D
110
¾
150
E
14
¾
22
F
45
¾
60
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
11
October 12, 2009
HT761X
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
Holtek Semiconductor Inc. (Taipei Sales Office)
4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan
Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
Fax: 886-2-2655-7383 (International sales hotline)
Holtek Semiconductor Inc. (Shenzhen Sales Office)
5F, Unit A, Productivity Building, No.5 Gaoxin M 2nd Road, Nanshan District, Shenzhen, China 518057
Tel: 86-755-8616-9908, 86-755-8616-9308
Fax: 86-755-8616-9722
Holtek Semiconductor (USA), Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538, USA
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright Ó 2009 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices
or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information,
please visit our web site at http://www.holtek.com.tw.
Rev. 1.30
12
October 12, 2009