PT8A3290 Datasheet, PDF (1/8 Pages) Pericom Semiconductor Corporation – Heating Controller

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PT8A3290/1/2/3/4/5/6/7
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Heating Controller
Features
Description
 Dual Voltage (120V/240V) operations
 Auto temperature control with NTC
 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
The PT8A3290/1/2/3/4/5/6/7 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.
Applications
 Curler
 Straightener
Pin Information
PT 8A3270/1/2/3
PT 8A3290/1/2/3
PT 8A3274/5/6/7
PT 8A3294/5/6/7
NTC1 1
NTC2 2
CLK
3
GND
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 Name
Pin No.
I/O
3290/1/2/3 3294/5/6/7
Description
1
NTC1
NTC1
I NTC voltage input, NTC open detection input
2
NTC2
NTC2
O Output signal for NTC open detection
3
CLK
CLK
I Clock input from power line
4
GND
GND
Power Ground and Power
5
ON
ON_OFF
I/O
3290/1/2/3: Heating-on button input. and LED1 driving output
3294/5/6/7: Heating-on/off button input and LED1 driving output
6
GATE
GATE
O TRIAC trigger output
7
OFF
LED2
I/O
3290/1/2/3: Heating-off button input and LED2 driving output
3294/5/6/7: LED2 driving output
8
VDD
VDD
Power Ground and Power
12-07-0006
PT0262-1 07/06/12
1