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PT8A3275 fiches techniques PDF

Pericom Semiconductor - Heating Controller

Numéro de référence PT8A3275
Description Heating Controller
Fabricant Pericom Semiconductor 
Logo Pericom Semiconductor 





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PT8A3275 fiche technique
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Features
PT8A3270/1/2/3/4/5/6/7
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Heating Controller
Description
Dual Voltage (120V/240V) operations
Auto temperature control with NTC
NTC open protection
Multi mode LED indicator
Proportional control
Pulse trigger for high current SCR
Internal Zener
Auto Heating off after heating timer timeout
Low cost 8-Pin DIP and SOIC package
Applications
Curler
Straightener
The PT8A3270/1/2/3/4/5/6/7 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.
Pin Configuration
PT 8A3270/1/2/3
PT 8A3290/1/2/3
PT 8A3274/5/6/7
PT 8A3294/5/6/7
P
P
NTC1
NTC2
CLK
GND
1
2
3
4
8 VDD NTC1 1
7 OFF
NTC2 2
6 GATE CLK 3
5 ON
GND 4
8 VDD
NTC1
7 LED2
NTC2
6 GATE
CLK
5 ON/OFF GND
Pin Description
Pin No.
Pin Name
3270/1/2/3 3274/5/6/7
1
NTC1
NTC1
2
NTC2
NTC2
3 CLK CLK
4 GND GND
5 ON ON_OFF
6
GATE
GATE
7 OFF LED2
8 VDD VDD
I/O Description
I NTC voltage input, NTC open detection input
O Output signal for NTC open detection
I Clock input from power line
Power
I/O
O
I/O
Power
Ground and Power
3270/1/2/3: Heating-on button input. and LED1 driving output
3274/5/6/7: Heating-on/off button input and LED1 driving output
3270/1/2/3/4/5/6/7: SCR trigger output
3270/1/2/3: Heating-off button input and LED2 driving output
3274/5/6/7: LED2 driving output
Ground and Power
12-07-0006
PT0257-1 07/06/12
1

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