PT8A3240/1/2/3/4/5/6/7
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Heating Controller
Features
Description
Dual Voltage (120V/240V) operations
The PT8A3240/1/2/3/14/5/6/7 is a mixed signal
Auto temperature control with NTC
CMOS LSI chip designed for the automatic controller of
NTC open protection
heat with external NTC (Negative Temperature
Multi mode LED indicator
Component). NTC open protection is implemented for
Direct drive SCR
device safety. When NTC is open, it will cut off GATE
Auto Heating off after heating timer timeout
output to disable heating, and the LED1 will flash at 1/8
Low cost 8-Pin DIP and SOIC package
CLK.
The device can be used in both 120V and 240V
Applications
power line supplier, automatically adjusting the heating
Hair Curler
power according to the power line voltage to avoid
heating appliance damage.
Pin Configuration
IC01-P10/1/2/3
IC01-14/5/6/7
N TC1
1
8
V DD
N TC1
1
8
V DD
N TC2
2
7
O FF
N TC2
2
7
LED
C LK
3
6
G ATE
C LK
3
6
G ATE
G ND
4
5
ON
G ND
4
5
O N/O FF
PT8A3240/1/2/3
PT8A3244/5/6/7
Pin Description
Pin Name
No.
I/O
Description
PT8A324
0/1/2/3
PT8A324
4/5/6/7
PT8A324
0/1/2/3
PT8A324
4/5/6/7
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
5
ON
ON/OFF
I/O
I/O
6
GATE
GATE
O
O
7
OFF
LED
I/O
O
8
VDD
VDD
Power
Power
12-07-0006
Ground.
Heating-on button input for PT8A3240/1/2/3 or Heatingon/off input for PT8A3244/5/6/7 and LED driving output.
SCR trigger output, active high.
Heating-off button input and LED2 driving output for
PT8A3240/1/2/3 or only LED2 driving output for
PT8A3244/5/6/7.
Power.
PT0217 -5
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07/06/12
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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Part No Option
Part No.
LED@ Heating on
PT8A3240
Flash
Timer of Auto power off
(1h@60Hz)
Y
PT8A3241
Constant
Y
Two Keys
PT8A3242
PT8A3243
Flash
Constant
N
N
Two Keys
Two Keys
PT8A3244
PT8A3245
Flash
Constant
Y
Y
Single Key
Single Key
PT8A3246
Flash
N
Single Key
PT8A3247
Constant
N
Single Key
Control Keys
Two Keys
Block Diagram
NTC1
2bit ADC
OFF (LED)
Controller
GATE
NTC2
CLK
ON (ON/OFF)
12-07-0006
PT0217 -5
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07/06/12
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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Function Description
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
state
Power line
voltage
NTC
(NTC open
detection)
NTC
(normal temp
detection)
GATE
(Trigger of
SCR)
25%
NTC20M(O
X
hm)
*Note:1)X means any input.
2)Flash1 frequency if 1/32 CLK.
3)Flash2 frequency is 1/8 CLK.
4)LED2(Pin 7)is always in reverse with LED1.
X
X
12-07-0006
LED (Pin 5)
PT8A3240/2/4/6
PT8A3241/3/5/7
VNTC
VNTC up
down
On
Flash1*
Flash1
Flash1
On
Flash1
On
On
On
On
On
Flash1
Flash1
On
Off
Flash1
On
On
Off
On
Off
Flash2*
Off
Off
50%
Flash1
0
0
0
On
PT0217 -5
3
07/06/12
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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Maximum Ratings
Storage Temperature…………………………………………..- 65oC to +150oC
Ambient Temperature with Power Applied……………………-20 oC to +85 oC
Supply Voltage to Ground Potential (Inputs & VCC only)……….- 0.5 to +6.0V
Supply Voltage to Ground Potential (Outputs & D/O only) …… - 0.5 to +6.0V
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 conditions above those indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended Operation Conditions
Sym
Pin
Description
Min
Typ
Max
Unit
3.5
5.0
5.5
V
VCC
VDD
Supply voltage.
fCLK
CLK
Input clock frequency
-
50/60
-
Hz
TA
-
Operation temperature
-20
-
85
C
Min
Typ
Max
Unit
VIN = VCC
-
-
5
A
PIN: NTC2
VIN = VCC Output
high impedance
-
-
5
A
PIN: NTC1, CLK
VIN = GND
-
-
-5
A
-
-
-5
A
-1.5
-
-
mA
2.0
-
-
mA
2.5
-
-
mA
DC Electrical Characteristics
(Unless otherwise noted, VCC = 3.5 ~ 5V, TA = -20 ~ 85ºC)
Sym
Description
Test conditions
IIH
Input high current
IIL
Input low current
IOH
Output high current
IOL
Output low current
VNTC0
Input voltage 0
PIN: NTC1
0.37VCC
0.385VCC
0.40VCC
VNTC1
Input voltage 1
PIN: NTC1
0.37VCC
0.385VCC
0.40VCC
VNTC2
Input voltage 2
PIN: NTC1
0.39VCC
0.40VCC
0.41VCC
ICC
Current consumption
NTC1, CLK tied to GND, V CC = 5.0V
-
-
250
A
Min
Typ
Max
Unit
-
50/60
-
Hz
1.15
1.2
1.25
Hour
PIN: NTC1, CLK
PIN: NTC2
PIN: GATE
PIN: NTC2
PIN: GATE
VIN = 0 Output
high impedance
VCC = 5.0V
Vout = 4.5V
VCC = 5.0V
Vout =0.5V
V
AC Electrical Characteristics
(Unless otherwise noted, VCC = 3.5 ~ 5V, TA = -20 ~ 85ºC)
Sym
Description
Test conditions
fCLK
CLK frequency
Timer
Power off timer
FCLK= 50Hz
12-07-0006
PT0217 -5
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07/06/12
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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Typical Application Circuit
PT8A3240/1/2/3 application circuit
PT8A3244/5/6/7application circuit
12-07-0006
PT0217 -5
5
07/06/12
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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Mechanical Information
PE (DIP-8)
Symbol
A
A1
A2
B
B1
c
D
E
E1
e
L
E2
Note:
1) Controlling dimensions in millimeters.
2) Ref : JEDEC MS-001D/BA
12-07-0006
Dimensions In Millimeters
Min
Max
3.710
4.310
0.510
3.200
3.600
0.380
0.570
1.524 BSC
0.204
0.360
9.000
9.400
6.200
6.600
7.320
7.920
2.540 BSC
3.000
3.600
8.400
9.000
PT0217 -5
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07/06/12
PT8A3240/1/2/3/4/5/6/7
Heating Controller
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WE (SOIC-8)
Symbol
A
A1
A2
b
c
D
E
E1
e
L
θ
Note:
1) Controlling dimensions in millimeters.
2) Ref : JEDEC MS-012E/AA
Dimensions In Millimeters
Min
Max
1.350
1.750
0.100
0.250
1.350
1.550
0.330
0.510
0.170
0.250
4.700
5.100
3.800
4.000
5.800
6.200
1.27 BSC
0.400
1.270
0°
8°
Ordering Information
Part No.
Package Code
Package
PT8A324xPE
P
Lead free DIP-8
PT8A324xWE
W
Lead free and Green SOIC-8
Note:
x=0/1/2/3/4/5/6/7 show different part no with different function, details see below table.
E = Pb-free or Pb-free & Green
Adding X Suffix= Tape/Reel
Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com
Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply
the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The
company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom.
12-07-0006
PT0217 -5
7
07/06/12
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