PT8A3290/1/2/3/4/5/6/7
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Heating Controller
Features
Description
Dual Voltage (120V/240V) operations
The PT8A3290/1/2/3/4/5/6/7 is a mixed signal
Auto temperature control with NTC
CMOS LSI chip designed as heating controller with help
NTC open protection
of external NTC (Negative Temperature Component).
Multi mode LED indicator
NTC open protection is implemented for device safety.
Proportional control
This device can be used in both 120V and 240V power
Pulse trigger for high current SCR/TRIAC (up to
line supplier, as it will automatically adjust the heating
15mA)
power according to the power line voltage to avoid
Internal Zener
heating appliance damage or long heating time. The
Auto Heating off after heating timer timeout
proportional control algorithm is designed in this
Low cost 8-Pin DIP and SOIC package
product.
Pin Information
Applications
Curler
Straightener
PT 8A3270/1/2/3
PT 8A3290/1/2/3
PT 8A3274/5/6/7
PT 8A3294/5/6/7
NTC1
1
8
VDD
NTC1
1
8
VDD
NTC1
NTC2
2
7
OFF
NTC2
2
7
LED2
NTC2
CLK
3
6
GATE
CLK
3
6
GATE
CLK
GND
4
5
ON
GND
4
5
ON/OFF
GND
Pin Description
Pin Name
Pin No.
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
5
ON
ON_OFF
I/O
6
GATE
GATE
O
7
OFF
LED2
I/O
8
VDD
VDD
Power
Ground and Power
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
TRIAC trigger output
3290/1/2/3: Heating-off button input and LED2 driving output
3294/5/6/7: LED2 driving output
Ground and Power
12-07-0006
PT0262-1
1
07/06/12
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PT8A3290/1/2/3/4/5/6/7
Heating Controller
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Block Diagram
NTC1
NTC2
Precise
5bit
ADC
OFF/TURBO/LED2
OFF/LED2
ADC
GATE
Controller
CLK
ON/ON_OFF/LED1
12-07-0006
PT0262-1
2
07/06/12
PT8A3290/1/2/3/4/5/6/7
Heating Controller
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Maximum Ratings
Storage Temperature ................................................................................... -65oC to +150oC
Supply Voltage to Ground Potential (Input & VCC Only).......................-0.5V to + 5.5V
Supply Voltage to Ground Potential (Outputs)..........................................-0.5V to + 5.5V
DC Input Voltage ............................................................................................-0.5V to + 5.5V
DC Output Current ...................................................................... 20mA
Power Dissipation ......................................................................................................... 500mW
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended operation conditions
Symbol
Pin
Parameter
Min
Typ
Max
Unit
Frequency
CLK
Input CLK Frequency
-
50/60
-
Hz
TA
-
Operating temperature
-20
-
85
℃
AC Electrical Characteristics
(VDD = 3.5 ~ 5.5V, TA = -20 ~ 85ºC, unless otherwise noted)
Symbol
Description
Test Conditions
Min
Type
Max
Unit
FCLK
Frequency of CLK
-
-
50/60
-
Hz
TGATE
Width of trigger pulse
-
160
200
240
S
Timer
Power off timer
1.15
1.2
1.25
Hour
FCLK= 50Hz
DC Electrical Characteristics
(VDD = 3.5 ~ 5.5V, TA = -20 ~ 85ºC, unless otherwise noted)
Symbol
IIH
Description
Input high current
Test Conditions
Input low current
Output High current
IOL
Output Low current
Max
Un
it
VIN = VDD
-
-
1
A
PIN: NTC1
VIN = VDD
-
-
100
nA
PIN: NTC2
VIN = VDD ,Output
High impedance
-
-
100
nA
VIN = GND
-
-
-1
A
VIN = 0.35V
-
-
-10
A
VIN = GND
-
-
-100
nA
-
-
-100
nA
-15
-
-
2.0
-
-
5.0
-
-
PIN: NTC1
VIN = GND, Output
High impedance
V DD =4.5V
Vout = 2.5V
V DD =4.5V
Vout =0.5V
V DD =4.5V
Vout =0.5V
PIN: NTC2
IOH
Type
PIN: CLK
PIN: CLK
IIL
Min
PIN: GATE
PIN: NTC2
PIN: GATE
m
A
m
A
m
A
VPOR
Voltage of POR
-
1.5
-
2.5
V
VZ
Voltage of Zener
IDD= 500uA ~ 10mA
4.5
5.0
5.5
V
IDD
Current consumption
NTC1,CLK pin tied to ground
V DD = 4.5V
-
-
500
A
12-07-0006
PT0262-1
3
07/06/12
PT8A3290/1/2/3/4/5/6/7
Heating Controller
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Functional Description
State description
Reset
The device will be of reset state after power-on.
Heating on
The device will be of heating on state after heating-on button is on
Heating off
This device enter heating-off state after its power-on reset or heating timer timeout, and all pins will be the same status as after
power-on reset.
NTC open protection
When NTC is open, NTC1 pin will be pulled low in the period of NTC open detected.
Timer
Once IC enters Heating-on State, internal timer starts to count. When time is out after 216000 clock period, it will exit heating-on
state. That is, in case of 60Hz CLK signal, the heating time is about 1 hour; and 1.2 hour for 50Hz.
In heating-on state, temperature is regulated to the selected temperature by the IC through NTC close control loop.
Control signal output
When working in Heating-on state, Gate/LED output will be related to NTC1 input and CLK input amplitude.
Effect of NTC and VTCLK (Level 2) on GATE and LED indication
Workin
g State
CLK input
voltage
NTC
(NTC open
detection)
NTC
(Normal temp
detection)
GATE
(trigger to
SCR/TRIAC)
LED
LED1
LED2
LED1
LED2
3290/2/4/6
Flash1*
3290/2/4/6
3291/3/5/7
On
3291/3/5/7
Off
On
On
On
On
On
Off
On
On
On
On
Off
Flash2*
Off
Off
0 ~ VADC_BIT15
Proportional
V ADC_BIT14 ~
output
On
V ADC_BIT1
V ADC_BIT1 ~
0
On
VDD
ON
V NTCO~
0 ~ VADC_BIT15
Flash1
Invert of
VDD
Proportional
LED1
Low for
V ADC_BIT14 ~
output
On
level 2
V ADC_BIT1
(120V)
V ADC_BIT1 ~
0
On
VDD
Off
X*
X
0
Off
X
X
0~V NTCO
X
0
Flash2*
*Note: 1) X means any input. 2) Flash1 frequency is 1/32 clock. 3) Flash2 frequency is 1/8 clock
High for
level 2
(240V)
12-07-0006
PT0262-1
4
07/06/12
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PT8A3290/1/2/3/4/5/6/7
Heating Controller
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Application Circuit
PT8A3290/1/2/3 Application circuit
PT8A3294/5/6/7 Application circuit
12-07-0006
PT0262-1
5
07/06/12
||||||||||||||||
PT8A3290/1/2/3/4/5/6/7
Heating Controller
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Mechanical Information
PE (DIP-8)
Symbol
A
A1
A2
B
B1
c
D
E
E1
e
L
E2
Note:
1) Controlling dimensions in millimeters.
2) Ref : JEDEC MS-001D/BA
12-07-0006
Dimensions In Millimeters
Min
Max
3.710
4.310
0.510
3.200
3.600
0.380
0.570
1.524 BSC
0.204
0.360
9.000
9.400
6.200
6.600
7.320
7.920
2.540 BSC
3.000
3.600
8.400
9.000
PT0262-1
6
07/06/12
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PT8A3290/1/2/3/4/5/6/7
Heating Controller
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WE (SOIC-8)
Symbol
A
A1
A2
b
c
D
E
E1
e
L
θ
Note:
1) Controlling dimensions in millimeters.
2) Ref : JEDEC MS-012E/AA
12-07-0006
Dimensions In Millimeters
Min
Max
1.350
1.750
0.100
0.250
1.350
1.550
0.330
0.510
0.170
0.250
4.700
5.100
3.800
4.000
5.800
6.200
1.27 BSC
0.400
1.270
0°
8°
PT0262-1
7
07/06/12
PT8A3290/1/2/3/4/5/6/7
Heating Controller
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Ordering Information
Part No.
PT8A329xPE
PT8A329xWE
Package Code
P
W
Package
Lead free 8-Pin DIP
Lead free and Green 8-Pin SOIC
Note:
“x” shows 0~7 with different function see Function Comparison Table.
E = Pb-free or Pb-free & Green
Adding X Suffix= Tape/Reel
Function Comparison Table
Part number
LED
Timer
Switch
Driver
PT8A3290
Flash
Y
Two Key (ON + OFF)
TRIAC
PT8A3291*
Constant
Y
Two Key (ON + OFF)
TRIAC
PT8A3292*
Flash
N
Two Key (ON + OFF)
TRIAC
PT8A3293*
Constant
N
Two Key (ON + OFF)
TRIAC
PT8A3294
Flash
Y
One key (ON_OFF)
TRIAC
PT8A3295
Constant
Y
One key (ON_OFF)
TRIAC
PT8A3296*
Flash
N
One key (ON_OFF)
TRIAC
PT8A3297*
Constant
N
One key (ON_OFF)
TRIAC
Note: *Contact Pericom for availability.
Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com
Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply
the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The
company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom.
12-07-0006
PT0262-1
8
07/06/12
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