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PT8A3361/62/63/64
NTC+LCD Heating Controller
Features
LCD screen showing temperature setting
Dual Temperature (Fahrenheit/Centigrade) Display
Backlights indicating work status
Auto temperature control with NTC
8 and 11 temperature levels option
Three keys: On/Off, Up and Down
NTC open protection
Pulse trigger for high current SCR/TRIAC (up to
15mA)
1 hour auto power off.
Dual Voltage (120V/240V) operations
Internal 5V zener
Lead free and Green QFN-24， TSSOP-24 and
SOIC-24 package; Lead free DIP-24 package
Description
The PT8A336x is a mixed signal CMOS LSI chip
designed as heating controller with help of external NTC
(Negative
Temperature
Component).
NTC
open
protection is implemented for device safety and 11
temperature levels. It can drive TRIAC or SCR directly.
It has 3 keys function setting. LCD displays and
backlight indicate the working status.
This device can be used in both 120V and 240V power
line supplier, as it will automatically adjust the heating
power according to the power line voltage to avoid
heating appliance damage or long heating time.
The PT8A336x build-in timer will be auto-power off
after power on 1 hour both 60Hz and 50Hz.
Applications
Heating Controller
Block Diagram
12-07-0006
1
PT0356-1
07/06/12
PT8A3361/62/63/64
NTC+LCD Heating Controller
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Pin Information
Pin Configuration
PT8A3361/62/63/64
Pin Description
Pin No.
1, 19
20, 21, 22,
24, 23, 2
3,4,5,6
7
8
9
10
11
12
13
14
15
16
17, 18
Name
SEL2,SEL1
SEG1,SEG2,
SEG3,SEG4,
SEG5,SEG6,
COM1,COM2
COM3,COM4
C/F
NTC1
NTC2
GND
CLK
K2
K1
VDD
GATE
BL1
NC
Type
I
O
O
O
I
O
Power
I
I
I
Power
O
O
-
Description
Select temperature setting: 00: 100C~200C; 01: 130C~230C;10:
120C~220C; 11: 160C~230C.
LCD digits control output.
LCD digits control output.
Internal pull up, default for LCD shows
C;
Low level: LCD shows
F.
NTC voltage input, NTC open detection input.
Output signal for NTC open detection.
Ground.
Clock input from power line.
Power on/off key inputs.
Up and down key inputs.
Power.
TRIAC and SCR trigger output.
Drive LCD backlight.
No connection.
12-07-0006
2
PT0356-1
07/06/12
PT8A3361/62/63/64
NTC+LCD Heating Controller
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Maximum Ratings
Storage Temperature ................................................................................... -55oC to +150oC
Supply Voltage to Ground Potential (Input & V
DD
Only)........................-0.5V to +6.5V
Supply Voltage to Ground Potential (Output s Only) ...............................-0.5V to +6.5V
DC Input Voltage .............................................................................................-0.5V to +6.5V
Input/Output Current ................................................................... 50mA
Input/Output Current (Pin VDD only) ...................................... 200mA
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
V
DD
T
A
Parameter
Operating Voltage
Operating temperature
Min
4.0
-20
Typ
-
-
Max
V
Z
85
Unit
V
°
C
Electrical Characteristics
(V
DD
= 4.0~Vz, T
A
= -20 ~ 85º unless otherwise noted)
C,
DC Input Characteristics
Symbol
Description
Test Conditions
Step
Step 0
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Step 11
Step 12
Step 13
Step 14
Pin:NTC1
Step 15
V
DD=
4.5V
Step 16
Step 17
Step 18
Step 19
Step 20
Step 21
Step 22
Step 23
Step 24
Step 25
Step 26
Step 27
Step 28
Step 29
Step 30
Step 31
Temp(º
C)
25
50
75
90
100
105
110
115
120
125
130
135
140
145
150
155
160
165
170
175
180
185
190
195
200
205
210
215
220
225
230
234
Min
0.08
0.2375
0.575
0.8675
1.089
1.2163
1.33
1.45
1.5875
1.70
1.81
1.93
2.05
2.17
2.25
2.3525
2.43
2.52
2.60
2.645
2.72
2.79
2.8450
2.89
2.94
2.98
3.0133
3.0472
3.08
3.116
3.138
3.16
Type
0.09
0.2475
0.585
0.8775
1.099
1.2263
1.34
1.46
1.5975
1.71
1.82
1.94
2.06
2.16
2.26
2.35
2.44
2.53
2.61
2.655
2.73
2.80
2.8550
2.9
2.95
2.99
3.0233
3.0572
3.09
3.126
3.148
3.17
Max
0.1
0.2575
0.595
0.8875
1.109
1.2363
1.35
1.47
1.6075
1.72
1.83
1.95
2.07
2.17
2.27
2.3725
2.45
2.54
2.62
2.665
2.74
2.81
2.8650
2.91
2.96
3.0
3.0333
3.0672
3.1
3.136
3.158
3.18
PT0356-1
3
Unit
VNTC-
ADC
Voltage of
ADC
V
To be continued
12-07-0006
07/06/12
PT8A3361/62/63/64
NTC+LCD Heating Controller
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Continued
Symbol
Description
I
IH
Input high
current
I
IL
Input low
current
Test Conditions
V
IN
= V
DD,
V
CLK
=GND
Pin:K1
V
IN
= V
DD,
V
CLK
=V
DD
Pin: C/F,
SEL2,
V
IN
= V
DD
SEL1
Pin: K2
V
IN
= V
DD
Pin: CLK V
IN
= V
DD
Pin:NTC1 V
IN
= V
DD
V
IN
=V
DD
,Output High
Pin:NTC2
impedance
V
IN
= GND, V
CLK
=-1V
Pin:K1
V
IN
= GND, V
CLK
=1V
Pin: C/F
V
IN
= GND
Pin:K2
SEL1,
V
IN
= GND
SEL2
V
IN
= GND
Pin: CLK
V
IN
=-0.35V
Pin:NTC1 V
IN
= GND
V
IN
= GND, Output High
Pin:NTC2
impedance
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-10
Type
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
60
5
5
80
1
100
100
-5
-60
-50
-5
-5
-10
-100
-100
Unit
A
A
A
A
nA
nA
A
A
A
A
A
nA
nA
DC Output Electrical Characteristics
Symbol
I
OH
Description
Output High
Current
Test Conditions
Pin: GATE
Pin: BL1, BL2, BL3
Pin: GATE
I
OL
Output Low
Current
Pin: BL
V
DD
= 4.5V
V
OUT
= 2.5V
V
DD
=4.5V
V
OUT
=4.0V
V
DD
= 4.5V
V
OUT
=0.5V
V
DD
=4.5V
V
OUT
=0.5V
Level3
Level2
Level1
V
DD
=
4.5V
Min
-15
-3.0
4.0
4.0
0.54V
DD
0.36V
DD
0.18V
DD
Type
-
-
-
-
0.6V
DD
0.4V
DD
0.2V
DD
Max
-
mA
-
-
mA
-
0.66V
DD
0.44V
DD
0.22V
DD
Unit
V
LCD
Output High
Voltage
Pin:COM1,COM2, COM3, COM4,
SEG1, SEG2, SEG3, SEG4,
SEG,5,SEG6,
Power Supply Characteristics
Symbol
V
POR
I
DD
V
DD
V
Z
TPO
off
Description
Voltage of POR
Current consumption
Supply voltage
Voltage of Zener
Power off timer
Test Conditions
-
No loading, V
DD
=4.5V
Control function normal
I
DD
=1mA ~20mA
F
CLK
= 50Hz/60Hz
Min
2
-
4.0
4.5
55
Type
-
-
-
5.0
60
Max
3
800
V
Z
5.5
65
Unit
V
A
V
V
Minute
12-07-0006
4
PT0356-1
07/06/12
PT8A3361/62/63/64
NTC+LCD Heating Controller
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Line Clock Synchronization Characteristics
Symbol
Description
Test Conditions
Level2
VTL_Level1
V
DD
=4.5V
VT_Level2 is high
VTH_Level1
VTL_Level1
V
DD
=4.5V
VT_Level2 is low
VTH_Level1
VTL_Level2
V
DD
=4.5V
VT_Level2 is high
VTL_Level2
VTL_Level2
V
DD
=4.5V
VT_Level2 is high
VTL_Level2
-
Min
1.7
-200
-100
-125
-40
105
210
70
145
-
Type
1.88
-250
-150
-175
-90
145
250
90
185
50/60
Max
2.1
-300
-200
-225
-140
185
290
110
225
-
Unit
V
V
T
_
CLK
Input Threshold
Voltage of CLK Pin
mV
F
CLK
Frequency of CLK
Hz
GATE Pulse Characteristics
Symbol
Tal_Gate
Description
Width of Gate trigger
pulse
Test Conditions
T
A
=25 º V
DD
= 4.5V
C,
V
DD
= 4.0 ~ Vz
T
A
= -20 ~ 85º
C
Min
291
285
Type
300
-
Max
309
315
Unit
s
s
12-07-0006
5
PT0356-1
07/06/12
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