PT8A3243.pdf 데이터시트 (총 7 페이지) - 파일 다운로드 PT8A3243 데이타시트 다운로드

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Features
Dual Voltage (120V/240V) operations
Auto temperature control with NTC
NTC open protection
Multi mode LED indicator
Direct drive SCR
Auto Heating off after heating timer timeout
Low cost 8-Pin DIP and SOIC package
Applications
Hair Curler
PT8A3240/1/2/3/4/5/6/7
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Heating Controller
Description
The PT8A3240/1/2/3/14/5/6/7 is a mixed signal
CMOS LSI chip designed for the automatic controller of
heat with external NTC (Negative Temperature
Component). NTC open protection is implemented for
device safety. When NTC is open, it will cut off GATE
output to disable heating, and the LED1 will flash at 1/8
CLK.
The device can be used in both 120V and 240V
power line supplier, automatically adjusting the heating
power according to the power line voltage to avoid
heating appliance damage.
Pin Configuration
IC01-P10/1/2/3
N TC1
N TC2
C LK
G ND
1
2
3
4
8 V DD
7 OFF
6 G ATE
5 ON
IC01-14/5/6/7
N TC1 1
8
N TC2 2
7
C LK
G ND
3
4
6
5
V DD
LED
G ATE
O N/O FF
PT8A3240/1/2/3
PT8A3244/5/6/7
Pin Description
Pin Name
I/O
No. PT8A324 PT8A324 PT8A324 PT8A324
0/1/2/3
4/5/6/7
0/1/2/3
4/5/6/7
Description
1
NTC1
NTC1
I
I NTC voltage input, NTC open detection input.
2
NTC2
NTC2
O
O Output signal for NTC open detection.
3 CLK CLK
I
I Clock input from power line.
4
GND
GND
GND
GND Ground.
5
ON ON/OFF
I/O
I/O
Heating-on button input for PT8A3240/1/2/3 or Heating-
on/off input for PT8A3244/5/6/7 and LED driving output.
6
GATE
GATE
O
O SCR trigger output, active high.
7 OFF LED
I/O
Heating-off button input and LED2 driving output for
O PT8A3240/1/2/3 or only LED2 driving output for
PT8A3244/5/6/7.
8
VDD
VDD
Power
Power Power.
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Part No Option
Part No.
PT8A3240
PT8A3241
PT8A3242
PT8A3243
PT8A3244
PT8A3245
PT8A3246
PT8A3247
LED@ Heating on
Flash
Constant
Flash
Constant
Flash
Constant
Flash
Constant
Block Diagram
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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Timer of Auto power off
(1h@60Hz)
Y
Y
N
N
Y
Y
N
N
Control Keys
Two Keys
Two Keys
Two Keys
Two Keys
Single Key
Single Key
Single Key
Single Key
NTC1
2bit ADC
OFF (LED)
NTC2
Controller
GATE
CLK ON (ON/OFF)
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Function Description
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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State description
Reset: The device will be at reset state after power-on.
Heating-on: The device will be at heating-on state after heating-on button is pressed.
Heating-off: This device enters heating-off state after its power-on reset or heating timer timeout or heating-off button pressed.
Timer
Once the device enters Heating-on state, internal timer start counting. It reaches timeout state and exit heating-on state after
216000 clock period, that is, the heating time is about 1 hour for 60Hz CLK signal, and 1.2 hour for 50Hz.
Control signal output
When working in Heating-on state, GATE/LED output will be related to NTC input and CLK input amplitude.
Effect of NTC and CLK input voltage on GATE and LED indication
Working Power line
state voltage
NTC
(NTC open
detection)
NTC
(normal temp
detection)
GATE
Trigger of
SCR
0 ~ VNTC0
220V
V NTC0 ~ V NTC1
V NTC1 ~ V NTC2
ON
NTC<10M(O
V NTC2 ~ VDD
hm) 0 ~ VNTC0
110V
V NTC0 ~ V NTC1
V NTC1 ~ V NTC2
V NTC2 ~ VDD
OFF X*
X
X
X
NTC>20M(O
hm)
X
*Note1X means any input.
2Flash1 frequency if 1/32 CLK.
3Flash2 frequency is 1/8 CLK.
4LED2(Pin 7)is always in reverse with LED1.
25%
12.5%
0
100%
50%
0
0
0
LED Pin 5
PT8A3240/2/4/6
VNTC up
VNTC
down
PT8A3241/3/5/7
Flash1* Flash1
On
Flash1
Flash1
On
On
On On
On
Flash1 Flash1
On
Flash1
Flash1
On
On
On On
On
Off Off
Off
Flash2* Off
Off
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