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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 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 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.
PT8AA327p0p/1/l2i/c3 ations
PT 8A3290/1C/2u/3rler
PT 8A3274/5/6/7 PT 8A3294/5/6/7
C1 1 S8 traigVhDtDener NTC1 1
C2 2
7 OFF
NTC2 2
8 VDD 7 LED2
K3
6 GATE CLK 3
6 GATE
D4
5 ON
GND
4
5 ON/OFF
Pin Configuration
PT 8A3278/9
PT 8A3280/1/2/3
PT 8A3288/9
PT 8A3284/5/6/7
NTC1 NTC2 CLK GND
1 2 3 4
8 VDD
NTC1 1
7 TURBO NTC2 2
6 GATE
CLK
3
5 ON/OFF GND 4
8 VDD 7 LED2 6 GATE 5 LED1
Pin Description
Pin No. Pin Name
1 NTC1 2 NTC2 3 CLK 4 GND 5 LED1 6 GATE 7 LED2 8 VDD
I/O Description
I O I Power I/O O I/O Power
NTC voltage input, NTC open detection input
Output signal for NTC open detection
Clock input from power line
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 3280/1/2/3/4/5/6/7: LED2 driving output
Ground and Power
12-07-0006
PT0261-1 07/06/12 1
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PT8A3280/1/2/3/4/5/6/7 Heating Controller
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Block Diagram
NTC1
5PbrietcAiDseC ADC
OFF/TURBO/LED2 LED2
NTC2
Controller
GATE
CLK ONL/OEND_1OFF/LED1
Maximum Ratings
StorageTemperature...................................................................................-65oC to +150oC SupplyVoltage to Ground Potential(Input & VCC Only).......................-0.5Vto +5.5V SupplyVoltage to Ground Potential(Outputs)..........................................-0.5Vto +5.5V DC Input Voltage ............................................................................................-0.5Vto +5.5V DC Output Current...................................................................... 20mA Power Dissipation.........................................................................................................500mW
Recommended operation conditions
Symbol Frequency
TA
Pin CLK
-
Parameter Input CLK Frequency Operating temperature
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.
Min Typ Max Unit
- 50/60 -
Hz
-20 - 85 ℃
AC Electrical Characteristics
(VDD = 3.5 ~ 5.5V, TA = -20 ~ 85ºC, unless otherwise noted)
Symbo l
Description
Test Conditions
FCLK Frequency of CLK
-
TGATE Width of trigger pulse
-
Timer Power off timer
FCLK= 50Hz
Min Type Max Unit
50/60
Hz
160 200 240
S
1.15 1.2 1.25 Hour
12-07-0006
PT0261-1 07/06/12 2
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PT8A3280/1/2/3/4/5/6/7 Heating Controller
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DC Electrical Characteristics
(VDD = 3.5 ~ 5.5V, TA = -20 ~ 85ºC, unless otherwise noted)
Symbo l
Description
Test Conditions
Min Type Max Unit
IIH Input high current IIL Input low current
PIN: CLK PIN: NTC1 PIN: NTC2
PIN: CLK
PIN: NTC1
VIN = VDD
VIN = VDD VIN = VDD ,Output High impedance
VIN = GND VIN = 0.35V
VIN = GND
-
-
- 1 A - 100 nA - 100 nA - -1 A - -10 A
- -100 nA
IOH Output High current IOL Output Low current
VPOR
Voltage of POR
PIN: NTC2 PIN: GATE PIN: NTC2 PIN: GATE
VIN = GND, Output High impedance
V DD =4.5V Vout = 2.5V V DD =.