PT8A3280/1/2/3/4/5/6/7
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Heating Controller
Features
Description
Dual Voltage (120V/240V) operations
Auto temperature control with NTC
The PT8A3280/1/2/3/4/5/6/7 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.
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
proportional control algorithm is designed in this
product.
NTC open protection
Multi mode LED indicator
Proportional control
Pulse trigger for high current SCR/TRIAC (up to
15mA)
Internal Zener
Auto Heating off after heating timer timeout
Low cost 8-Pin DIP and SOIC package
Pin Configuration
PT8A3280/1/2/3
Applications
PT8A3284/5/6/7
Curler
NTC1
NTC2
CLK
1
2
3
4
8
7
6
5
VDD
Straightener
LED2
GATE
LED1
GND
Pin Description
Pin No.
Pin Name
I/O
Description
1
2
3
4
5
6
7
8
NTC1
NTC2
CLK
I
O
NTC voltage input, NTC open detection input
Output signal for NTC open detection
Clock input from power line
I
GND
LED1
GATE
LED2
VDD
Power
I/O
O
Ground and Power
3280/1/2/3/4/5/6/7: LED1 driving output
3280/1/2/3: SCR trigger output
3284/5/6/7: TRIAC trigger output
I/O
Power
3280/1/2/3/4/5/6/7: LED2 driving output
Ground and Power
12-07-0006
PT0261-1 07/06/12
1