PT8A3515B.pdf 데이터시트 (총 8 페이지) - 파일 다운로드 PT8A3515B 데이타시트 다운로드

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PT8A3514/15/16/17/18/19(A/B)
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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
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
Applications
Description
The PT8A3514/15/16/17/18/19(A/B) 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.
Pin Assignment
DISC/BUZ 1
RELAY 2
LED 3
GND 4
8 VCC
7 ACCLK
6 SW
5 TEST
Electric Iron Controller
Fig1 PT8A351x pin assigment
Pad Description
Pin No. Pin Name I/O
Description
Discharge the external electrolytic cap to stabilize and limit its voltage. Output 4KHz to
1 DISC/BUZ O
driver buzzer when timer is out. Active high.
2
RELAY
O Relay drive output, active high.
With open drain output, it can shut off external LED in parallel with this open-drain
3 LED O
transistor, active low.
4
GND
- Ground.
5
TEST
I Low for test mode*.
6 SW I Sensor signal input, input high will be considered horizontal.
7
ACCLK
I AC 60/50Hz signal for clock with Schmitt architecture, internal drop down.
8
VCC
- Power supply.
*Note: Teat mode comparison table:
Real timer
Test timer
30s 8m 10m
3s 9.6s 9.6s
15m
12s
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PT0259-3 07/06/12
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PT8A3514/15/16/17/18/19(A/B)
Smart Iron Controller
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Block Diagram
Sensor signal
SW processor
Power on
re s e t
SWO
Logic Control
C i rcu i t
VCC
GND
RELAY
LED
DISC/BUZ
System
os ci l l ator
3 0 s /8 /1 0 /1 5 m i n
Ti m e r
ACCLK
TEST
PT8A3513/4/5/6/7/8/9
Figure 2. Function Block Diagram
Maximum Ratings
Storage Temperature………………………………………… - 40oC to +125oC
Supply Voltage to Ground Potential (Inputs & VCC only)….. - 0.5 to VCC +0.5V
Supply Voltage to Ground Potential (Outputs & D/O only)... - 0.5 to VCC +0.5V
DC Input Voltage …………………………………………...- 0.5V to VCC +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.
Recommended Operating Conditions
Symbol
VCC
TA
Description
Supply voltage
Operating Temperature
Min Typical Max Unit
4.5 5 5.5 V
-10 25 85 C
Electrical Characteristics (TA = -10 ~ 85ºC, unless otherwise noted)
Sym Parameter
VCC Internal Shunt regulator voltage
I IL1 Input low current(ACCLK)
I IL2 Input low current(TEST)
I IL3 Input low current(SW)
I IH1 Input high current(ACCLK)
I IH2 Input high current(ACSEL)
I IH3 Input high current(SW)
IOH1 Output Source Current (RELAY /DISC)
IOL1
Output Sink Current
(RELAY /DISC)
IOL2 Output Sink Current (LED)
ICC Power supply current
Test Conditions
VCC
Condition
--
5V VIL=0V
5V VIL=0V
5V VIL=0V
5V VIH=5V
5V VIH=5V
5V VIH=5V
5V VOH1=2.5V
5V VOL1=0.5V
5V VOL2=0.5V
4V See Figure3
Min
Typ
Max
Uni
t
4.5 5 5.5 V
- - -1 A
-5 - -30 A
- - -1 A
30 - 100 A
- - 30 A
- - 1 A
-0.3 - -0.7 mA
5 - - mA
10 -
- mA
- - 400 A
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PT8A3514/15/16/17/18/19(A/B)
Smart Iron Controller
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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.
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.
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