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Data Sheet
PT8A3514/15/16/17/18/19(E/F)
Smart Iron Controller
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Build in RC oscillator for sensor signal detection
On chip shunt regulated power supply
Using AC 60Hz/50Hz as timer clock can select by
Part No.
Accurate timer with error dropping in
±1%
Sensitive movement detection
Powerful immunity of sensor Vibration
30s time out for IRON in static horizontal position
8min/10min/15min time out for IRON in static
vertical position
LED to indicate operation status
Usable in both 120V and 240V voltage supply
system
Quick function test mode
Support buzzer
Auto shut off timer disable function
Few external components
System standby mode power dissipation less than
1W (Base on recommended application circuits)
DIP-8 and SOIC-8 package
Patent No: ZL 2005 2 0048330.4
Description
The PT8A3514/15/16/17/18/19(E/F) are high
performance low power and low cost CMOS chips
designed for intelligent electric IRON controller. Their
intelligence mainly results from their sensitive detection
to the movement and static position of electric iron by
using a special sensor. With the sensor, these chips can
detect the vertical/horizontal position and movement
status of IRON.
These chips are equipped with on-chip shunt
regulator, sensor signal processor, build-in oscillator,
timer, logic control, power on reset and output driving
block etc.
Ordering Information
Part Number
PT8A351xEPE
PT8A351xFPE
PT8A351xEWE
PT8A351xFWE
Package
Lead free DIP-8
Lead free DIP-8
Lead free and Green SOIC-8
Lead free and Green SOIC-8
Note:
See below
Function comparison table
for details.
Application
•
Electric Iron Controller
Function comparison table
Part Number
PT8A3514E
PT8A3515E
PT8A3516E
PT8A3517E
PT8A3518E
PT8A3519E
PT8A3514F
PT8A3515F
PT8A3516F
PT8A3517F
PT8A3518F
PT8A3519F
Frequency
50Hz
50Hz
50Hz
50Hz
50Hz
50Hz
60Hz
60Hz
60Hz
60Hz
60Hz
60Hz
Vertical Timer
10min
8min
15min
8min
15min
10min
10min
8min
15min
8min
15min
10min
Horizontal timer
30s
30s
30s
30s
30s
30s
30s
30s
30s
30s
30s
30s
Buzzer
Continual
Stop after 6 times
Stop after 6 times
Continual
Continual
Stop after 6 times
Continual
Stop after 6 times
Stop after 6 times
Continual
Continual
Stop after 6 times
Note: PT8A351xE/F debounce time for sensor detect is 2.5-5ms
PT0339 (09/09)
1
Ver: 1
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Data Sheet
PT8A3514/15/16/17/18/19(E/F)
Smart Iron Controller
Block Diagram
VCC
Sensor signal
processor
Power on
reset
GND
SW
SWO
Logic Control
Circuit
RELAY
LED
DISC/BUZ
System
oscillator
30s/8/10/15min
Timer
ACCLK
TEST
PT8A3513/4/5/6/7/8/9
Figure 2. Function Block Diagram
Pad Assignment
DISC/BUZ 1
RELAY
LED
GND
2
3
4
8 VCC
7 ACCLK
6 SW
5 TEST
Fig1 PT8A351x pin assigment
Pad Description
Pin No.
1
2
3
Pin Name
DISC/BUZ
RELAY
LED
I/O
O
O
O
Description
Discharge the external electrolytic cap to stabilize and limit its voltage. Output
4KHz to driver buzzer when timer is out. Active high.
Relay drive output, active high.
With open drain output, it can shut off external LED in parallel with this open-drain
transistor, active low.
Ground.
Low for test mode*.
Sensor signal input, input high will be considered horizontal.
AC 60/50Hz signal for clock with Schmitt architecture, internal drop down.
Power supply.
30s
3s
8min
9.6s
10min
9.6s
15min
12s
4
GND
-
5
TEST
I
6
SW
I
7
ACCLK
I
8
VCC
-
*Note: Teat mode comparison table:
Real timer
Test timer
PT0339 (09/09)
2
Ver: 1
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Data Sheet
PT8A3514/15/16/17/18/19(E/F)
Smart Iron Controller
Functional Description
(Refer to
Block Diagram)
The chip is comprised of several blocks: on-chip shunt
regulator, sensor signal processor, build-in system oscillator,
30s/8min/10min/15min timer, logic control circuit, and power
on reset, etc. Each block will be described as below.
Logic control circuit
Logic control circuit mainly carries out logic control function.
It not only collects signals from other blocks, but also
generates various driving signals including RELAY&DISC.
Besides, an external LED will flash at about 1Hz and a buzzer
will make a sound with a frequency of 4KHz every 0.5s for 6
times or continual after internal timer times out. Signals at
RELAY will control external relay to decide whether IRON
heats or not.
Sensor signal processor
The core in the whole system is how to correctly detect the
position and movement of sensor so that the system can be
always under safe control. Thus, it is critical to accurately and
correctly deal with signal from sensor in different status and
eliminate the noise caused by debounce action from sensor.
Here, a unique structure is used to do the high-requirement
signal processing.
In real application of IRON, sensor needs to be installed
according to certain requirements (for example its inclination).
Timer
Timer block mainly generates various timing signal according
to the position of IRON.
It is easy to get accurate timer (30s/8min/10min/15min) by
using AC 60Hz/50Hz signal as timing reference. As above
description, Iron in Horizontal position over 30s will stop
heating. While Iron in vertical position over 8min/10min/
15min will also stop heating.
When SW pin connects to ACCLK pin, all timer will be
disabled.
Buzzer
A buzzer will make 0.5S sound with a frequency of 4 KHz for
6 times or continual after internal timer timeouts.
LED
During heating, LED pin is floating and an external LED will
turn on. After times out, LED pin outputs pulse and an
external LED will flash at about 1Hz.
Maximum Ratings
Storage Temperature………………………………………… - 40
o
C to +125
o
C
Supply Voltage to Ground Potential (Inputs & V
CC
only)….. - 0.5 to V
CC
+0.5V
Supply Voltage to Ground Potential (Outputs & D/O only)... - 0.5 to V
CC
+0.5V
DC Input Voltage …………………………………………...- 0.5V to V
CC
+0.5V
DC Output Current ………………………………………………………..20mA
Power Dissipation………………………………………………………..500mW
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Typical
5
25
Max
5.5
85
Unit
V
°C
Recommended Operating Conditions
Symbol
V
CC
T
A
Description
Supply voltage
Operating Temperature
Min
4.5
-10
Electrical Characteristics
(T
A
= -10 ~ 85ºC, unless otherwise noted)
Sym
V
CC
I
IL1
I
IL2
I
IL3
I
IH1
I
IH2
I
IH3
I
OH1
I
OL1
I
OL2
I
CC
V
POR
Parameter
Internal Shunt regulator voltage
Input low current(ACCLK)
Input low current(TEST)
Input low current(SW)
Input high current(ACCLK)
Input high current(ACSEL)
Input high current(SW)
Output Source Current (RELAY /DISC)
Output Sink Current
(RELAY /DISC)
Output Sink Current (LED)
Power supply current
Power on reset voltage.
Test Conditions
V
CC
Condition
-
-
5V
V
IL
=0V
5V
V
IL
=0V
5V
V
IL
=0V
5V
V
IH
=5V
5V
V
IH
=5V
5V
V
IH
=5V
5V
V
OH1
=2.5V
5V
5V
4V
-
3
V
OL1
=0.5V
V
OL2
=0.5V
See Figure 3
-
Min
4.5
-
-5
-
30
-
-
-0.3
5
10
-
1.6
Typ
5
-
-
-
-
-
-
-
-
-
-
-
Max
5.5
-1
-30
-1
100
30
1
-0.7
-
-
400
3.0
Unit
V
µA
µA
µA
µA
µA
µA
mA
mA
mA
µA
V
Ver: 1
PT0339 (09/09)
Analog electronics
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