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Data Sheet
PT8A3263-66A-F/67A/68A
NTC Heating Controller with Multi LEDs
Description
Features
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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
Application
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Ceramic heating controller
Ordering Information
Ordering No.
PT8A326xXPE
PT8A326xXWE
PT8A3267APE
PT8A3267AWE
PT8A3268APE
PT8A3268AWE
Package
Lead free 16-pin DIP
Lead free 16-pin SOIC
Lead free 16-pin DIP
Lead free 16-pin SOIC
Lead free 16-pin DIP
Lead free 16-pin SOIC
Note:
“x” shows 0~4 and “X” shows A-F with different
function. See
Function Comparison Table.
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.
Block Diagram
PT0326 (12/09)
1
Ver:0
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Data Sheet
PT8A3263-66A-F/67A/68A
NTC Heating Controller with Multi LEDs
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:
Off 1 2 3 4 5 (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
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)
PT0326 (12/09)
4
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)
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.
Ver:0
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