||||||||||||||||

||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||

Heating Controller

12-07-0006

PT0262-1

07/06/12

1

PT8A3290/1/2/3/4/5/6/7

Features



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

Applications



Curler



Straightener

Description

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.

Pin Information

NTC1

NTC2

CLK

GND

ON

GATE

OFF

VDD

1

2

3

4

5

6

7

8

PT 8A3270/1/2/3

NTC1

NTC2

CLK

GND

ON/OFF

GATE

LED2

VDD

1

2

3

4

5

6

7

8

PT 8A3274/5/6/7

NTC1

NTC2

CLK

GND

ON/OFF

GATE

TURBO

VDD

1

2

3

4

5

6

7

8

PT 8A3278/9

NTC1

NTC2

CLK

GND

LED1

GATE

LED2

VDD

1

2

3

4

5

6

7

8

PT 8A3280/1/2/3

PT 8A3290/1/2/3

PT 8A3294/5/6/7

PT 8A3288/9

PT 8A3284/5/6/7

Pin Description

Pin No.

Pin Name

I/O

Description

3290/1/2/3

3294/5/6/7

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