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PT8A3263-66A-F/67A/68A
NTC Heating Controller with Multi LEDs
Features
5/6 steps heat temperature settings with 5 LEDs or 6
LEDs indicator
Auto temperature control with NTC
NTC open protection
Pulse trigger for high current SCR / TRIAC (up to
15mA)
Auto power off after exact 1 Hour heating(It is
optional to disable.)
Dual Voltage (120/240V 50/60Hz) operations (only
PT8A3263-3266A/B/C available)
Auto detect power supply Voltage (120V/240V) and
frequency (50/60Hz)
Internal 5V Zener
DIP-16 and SOIC-16 package
Description
The PT8A3263/4/5/6/7/8 are mixed signal CMOS
LSI chips specially designed for heating controller with
the external NTC (Negative Temperature Component)
sensor. NTC open protection is implemented for device
safety and selectable 5 or 6 heating temperature levels.
PT8A3263/64 are for 5 step levels (eg.100℃,
120℃, 140℃, 160℃, 180℃) and PT8A3265/66 are for
6 step levels (eg. 100℃, 120℃, 140℃, 160℃, 180℃,
200℃). They can drive TRIAC or SCR directly and
detect the heater’s temperature with NTC sensor input.
They have up/down keys for temperature setting, On/Off
Key for heating on/off control and 3 LEDs display mode.
PT8A3267/68 have 6 step levels (eg.100℃, 120℃,
140℃, 160℃, 180℃, 200℃). They can drive TRIAC or
SCR directly and detect the heater’s temperature with
NTC sensor input. They have up/down keys for
temperature setting and On/Off Key for heating on/off
control. They also have 1 second (2 seconds for
PT8A3268A) delay function before go into off state and
lock-key function. Their LEDs have special running
flash mode (mode 4)
These devices can be used in both 120V and 240V
power line system, as they can automatically adjust the
heating power according to the power line voltage to
avoid heating appliance damage or long heating time.
They have selectable build-in timer to enable/
disable auto-power off function after turn on 1 hour and
the timer is 1 hour both under 60Hz and 50Hz power
supply.
Applications
Ceramic heating controller
Pin Configuration
NTC1 1
NTC2 2
CLK 3
TM 4
C1
K1
K2
GND
5
6
7
8
16 VDD
15 GATE
14 L6
PT8A326x
13 L5
12 L4
11 L3
10 L2
9 L1
Pin Description
Name
NTC1
NYC2
CLK
TM
C1
K1
K2
L1~L6
GATE
GND
VDD
12-07-0006
1
Pin No.
1
2
3
4
5
6
7
9-14
15
8
16
Type
I
O
I
I
O
I
I
O
O
Ground
Power
Description
NTC voltage input, NTC open detection input
Output signal for NTC open detection
Clock input from power line
Timer be disabled if tied ground
ON state indicator / lock key indicator for 3267A/3268A
UP, DOWN push button input
ON/OFF push button input
Six temperature steps indicator LED1~LED6 output
TRIAC and SCR trigger output
Ground
Power Supply.
PT0326-1
07/06/12
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PT8A3263-66A-F/67A/68A
NTC Heating Controller with Multi LEDs
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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.
Maximum Ratings
Storage Temperature ................................................................................... -55oC to +150oC
Ambient Temperature with Power applied...............................................-20oC to +85oC
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, VB only) ............................... 200mA
Power Dissipation ......................................................................................................... 500mW
Recommended operation conditions
Sym
V
DD
T
A
F
CLK
Parameter
Operating Voltage
Operating temperature
Frequency of CLK
Pin
VDD
-
CLK
Min
4.0
-20
-
Typ
V
Z
-
50/60
Max
-
85
-
Unit
V
°
C
Hz
DC Electrical Characteristics
DC Input Electrical Characteristics
(V
DD
= 4.5V, T
A
= -20 ~ 85º unless otherwise noted)
C,
Symbol
Description
Test Conditions
Level
1-half
1
2-half
2
3-half
3
4-half
4
5-half
5
6-half
6
Temp(º
C)
90
100
110
120
125
140
145
160
160
180
180
200
V
IN
= V
DD
V
IN
= V
DD
V
IN
= V
DD
V
IN
= GND
V
IN
= GND
V
IN
= GND
-
-
Min
0.8675
1.0925
1.34
1.5875
1.7113
2.06
2.1613
2.4425
2.4425
2.735
2.735
2.9488
-1
-
-100
-30
-1
-100
80
80
Type
0.8775
1.1025
1.35
1.5975
1.7213
2.07
2.1713
2.4525
2.4525
2.745
2.745
2.9588
-
-
-
-40
-
-
100
100
Max
0.8875
1.1125
1.36
1.6075
1.7313
2.08
2.1813
2.4625
2.4625
2.755
2.755
2.9688
1
1
100
-50
1
100
120
120
Uni
t
VT_
NTC1
Voltage of NTC1
Pin:NTC1
V
DD
=4.5V
V
I
IH
Input high current
I
IL
R
PULL-UP
R
PULL-
DOWN
Input low current
Internal pull-up
resistance
Internal pull-
down resistance
PIN:TM
PIN: CLK
PIN: NTC1
PIN:TM
PIN: CLK
PIN: NTC1
PIN: K1, K2
PIN: K1, K2
uA
A
nA
uA
A
nA
KΩ
KΩ
12-07-0006
2
PT0326-1
07/06/12
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PT8A3263-66A-F/67A/68A
NTC Heating Controller with Multi LEDs
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Description
Test Conditions
V
DD
= 4.5V
PIN: GATE
V
OUT
= 2.5V
V
DD
=4.5V
PIN: L1-L6
V
OUT
=4.0V
V
DD
=4.5V
PIN: C1
V
OUT
=4.0V
V
DD
= 4.5V
PIN: GATE
V
OUT
=0.5V
V
DD
=4.5V
PIN: L1-L6
V
OUT
=0.5V
V
DD
=4.5V
PIN: C1
V
OUT
=0.5V
V
DD
= 4.5V
PIN: NTC2
V
OUT
= 0.5V
Min
-15
-5
-5
4
3
3
20
Type
-
-
-
-
-
-
-
Max
-
-
-
-
-
mA
-
-
mA
Unit
DC Output Electrical Characteristics
Symbol
I
OH
Output High Current
I
OL
Output Low Current
Power Supply Characteristics
Symbol
V
POR
I
DD
Vz
T
PO
Description
Voltage of POR
Current consumption
Voltage of Zener
Power off timer
Test Conditions
-
No loading, V
DD
=4.5V
I
DD
=500A~20mA
F
CLK
= 50/60Hz
Min
2.5
-
4.5
54
Type
-
-
5.0
60
Max
3.5
400
5.5
66
Unit
V
A
V
Min
Line Clock Synchronization Characteristics
Symbol
Description
Compare Threshold
Voltage of CLK Pin
Test Conditions
VT4
VT3
VT2
VT1
V
CLK
>V
LEVEL
V
CLK
<V
LEVEL
Min
105
-100
60
-40
1.69
Type
145
-150
90
-90
1.88
Max
185
-200
120
-140
2.07
Unit
V
TCLK
mV
120V/240V Level
V
LEVEL
Threshold Voltage of CLK
V
DD
= 4.5V
Pin
Note:
The four comparators (VT1~VT4) have about 100mV hysteresis
V
GATE Pulse Characteristics
Symbol
Tal_Gat
e
Description
Width of Gate trigger
pulse
Test Conditions
V
DD
=4.0~V
Z
; T
A
=-20~85º
C
Min
270
Type
300
Max
330
Unit
s
Internal RC Oscillator Frequency Characteristics
Symbol
Fosc
Description
Frequency of RC
Oscillator
Test Conditions
V
DD
=4.0~V
Z
; T
A
=-20~85º
C
V
DD
=4.0~V
Z
; T
A
=25º
C
Min
74.4
76
Type
80
80
Max
85.6
84
Unit
KHz
KHz
12-07-0006
3
PT0326-1
07/06/12
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PT8A3263-66A-F/67A/68A
NTC Heating Controller with Multi LEDs
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Block Diagram
12-07-0006
4
PT0326-1
07/06/12
||||||||||||||||
PT8A3263-66A-F/67A/68A
NTC Heating Controller with Multi LEDs
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1) Mode 1
Standby/Off state: LED1 ~ LED6 are all off
On State: The LED that be setting level is on.
2) Mode 2
Standby/Off state: LED1 ~ LED6 are all off
On state:
Heating up: The LED that be setting level is Flash. (Fclk/32)
Stable: This LED is on
Drop: This LED is on
3) Mode 3
Standby/Off state: LED1 ~ LED6 are all off
On state: The LED that be setting level and below the
setting level are on.
4) Mode 4
Standby/Off state: LED1 ~ LED6 are all off
On state:
Level 1:
Heating up/ Drop: LED1 is flash (Fclk/32)
Stable: LED1 is on
Level2:
Heating up/ Drop: LED1 and LED2 is round flash (Fclk/16)
Stable: LED1 and LED2 are on
Level4 ~ Leve6: similar as upon
Note:
1. When in stable state, don’t flash even if detect the below or
over setting temperature(for mode2 and mode4)
2. When push up/down key, the setting LED will be on state
for 1.5s before starting flashing(for mode2 and mode4)
3. When push up/down key, the setting LED will be forced to
flash for 2.5s (for mode4)
5) NTC open state
The LED that relate with the setting temperature is fast
flash (Fclk/8)
Disable up/down key function
If detect NTC is not open, recover working state
6) LED drive style
LED1-LED6: High pulse drive (50Hz)
C1: High level drive, PT8A3267/68A use pulse drive (50Hz)
Functional Description
Input Button
For PT8A3263/64/65/66
1)
Up button:
Temperature up adjustment. Push it once the
temperature setting will increase one level until the
highest level is reached.
2)
Down button:
Temperature down adjustment. Push
Down button once, the temperature setting will reduce
one level until the lowest level is reached.
3)
On/Off button:
This button is toggled on Heating-on
state and Heating-off state.
For 1-key mode, this key will be set the temperature by loop:
Off12345(6)Off
When power on IC first, the initial temperature setting is
Level 4 (Internal option: Level1)
Delay function:
Heating-on & Heating-off has no delay
(Internal option: Heating-on has 0.5 second delay & Heating-
off has 1 second delay).
4)
C1:
When in ON state, C1 output high.
For PT8A3267A/68A
1)
Up button:
Temperature up adjustment. Push Up button
once, the temperature setting will increase one level until
the highest level is reached.
2)
Down button:
Temperature down adjustment. Push
Down button once, the temperature setting will reduce
one level until the lowest level is reached.
3)
On/Off button:
This button is toggled on Heating-on
state and Heating-off state.
PA8A3267A: When power on IC first, the initial temperature
setting is Level 4
PA8A3268A: When power on IC first, the initial temperature
setting is Level 6
If power is always on IC, the last setting temperature level will
be memorized when push ON again
Delay function:
PT8A3267A: Heating-on has no delay & Heating-off has 1
second delay
PT8A3268A: Heating-on has no delay & Heating-off has 2
second delay
4)
C1: Lock key function
When in Heating-on state, after continuously push
on/off key down twice( The interval is less than 600ms ),
IC will lock current temperature level state and disable
up/down and on/off function, C1 pin output high level
When in lock state push on/off key down twice again,
IC will unlock current temperature level state and enable
up/down and on/off function, C1 pin output low level
Reset
After power on, the chip will be reset by internal POR
circuit, GATE, LED and C1 pins output low level and IC is
in Standby state
Timer
Once IC enters Heating-on state, internal timer will
start to count. It’ll be timeout and auto heating-off after
exact 1 hour both under 60Hz and 50Hz. This function
can be disabled by Pin TM is tied to ground.
The timer will be clear while push up/down key.
Control signal output
When working in Heating-on state, Gate output will be
related to NTC1 input and CLK input amplitude.
LEDs indicator:
LED1: Level 1 temperature setting ( eg. 100℃)
LED2: Level 2 temperature setting ( eg. 120℃)
LED3: Level 3 temperature setting ( eg. 140℃)
LED4: Level 4 temperature setting ( eg. 160℃)
LED5: Level 5 temperature setting ( eg. 180℃)
LED6: Level 6 temperature setting ( eg. 200℃, for
PT8A3265/6x, PT8A3267A/68A)
12-07-0006
5
PT0326-1
07/06/12
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