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PT8A330x
Ceramic Heating Controller
Features
High watt density Alumina Heaters
High current pulse trigger for SCR
Quickly Heating-Up and Quickly Lost-Heat-
Recover
Dual voltage 120VAC / 240VAC
Internal 5v zener
Insensitive to environment temperature
Auto power off（Optional）
DIP-8 and SOIC-8 package
Description
The PT8A330X is specially designed for ceramic
heating control system. It can set the temperature
continuously .It can drive SCR directly and detect the
heater temperature without extra temperature sensor. It
has one key, two keys and no key for function setting
and has one LED for working state indication. Build-in
timer will automatically power off after turn on for 1
hour @ 60Hz or 1.2 hour @ 50Hz (for PT8A3300/1/4/5).
Applications
Ceramic heating controller
Pin Configuration
Pin Description
Name
VDD
PTC
VB
REF
LED
CLK
GND
GATE
Pin No.
1
2
3
4
5
6
7
8
Type
power
I
O
O
O
I
power
O
Description
Power input or can be used as OFF push button input
Temperature sensor input and ON push button input in two key option or ON/OFF
toggle button in one key option
Sampling bias voltage
Reference for internal comparator
LED driver output
Clock input from AC power line
Power Ground
SCR trigger output, active high
12-07-0006
1
PT0258-1
07/06/12
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PT8A330x
Ceramic Heating Controller
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Block Diagram
Maximum Ratings
Storage Temperature ................................................................................... -55oC to +150oC
Supply Voltage to Ground Potential (Input & V
DD
Only).......................-0.5V to + 6.5V
Supply Voltage to Ground Potential (Output s Only) ..............................-0.5V to + 6.5V
DC Input Voltage ............................................................................................-0.5V to + 6.5V
Input/Output Current
...................................................................................
50mA
Input/Output Current(Pin VDD, VBonly) ................................. 200mA
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 condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended operation conditions
Symbol
T
A
V
DD
Description
Operation Temperature
Min
-20
Type
-
Max
+85
Unit
C
Supply voltage
4.0
4.5
5.0
V
12-07-0006
2
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07/06/12
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PT8A330x
Ceramic Heating Controller
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Electrical Characteristics
(V
DD
= 4.5, T
A
= -20 ~ 85º unless otherwise noted)
C,
DC Electrical Characteristics
Symbol
I
IH
I
IL
R
REF
Description
Input high current
Input low current
The resistor between
REF and GND
Test Conditions
PIN: PTC ,CLK
PIN: PTC ,CLK,
REF
PIN: REF
V
IN
= V
DD
V
IN
= GND
V
IN
= 1V
Min
-
-
20
Type
-
-
47
Max
5
-5
80
Unit
A
A
K
Ohms
I
OH
Output High Current
PIN: GATE
V
DD
= 4.5V
V
OUT
= 2.5V
-15
-
-
mA
I
OL
IVB
SHO
RT
Output Low Current
Output short current
Resistor of switch on
Resistor of switch off
Resistor of Rma_TSet
Output High Current
PIN: GATE
V
DD
= 4.5V
V
OUT
=0.5V
4.0
IC No
break
-
5M
35
-3
-
-
-
-
-
-
-
-
15
－
65
-
mA
mA
Ohms
Ohms
K
ohms
mA
PIN: VB, VB short to GND
PIN: VDD to VB
PIN: VDD to VB
PIN: VB to REF
PIN: LED
V
DD
= 4.5V
I
OUT
= 100mA
V
DD
= 4.5V
I
OUT
<1uA
V
DD
= 4.5V
I
OUT
= 50uA
V
DD
= 4.5V
V
OUT
= 3.5V
V
DD
= 4.5V
V
OUT
=1.5V
R
ON_VB
R
OFF_VB
R
ON_TS
I
OH
I
OL
Output Low Current
PIN: LED
5
-
-
mA
Power Supply Characteristics
Symbol
V
POR
V
KON
I
DD
V
DD
TPO
off
Description
Voltage of POR
Input Threshold Voltage
of PTC Pin for key
detecting
Current consumption
Supply voltage
Power off timer
Test Conditions
-
R
ON
=10ohm
No loading, V
DD
= 4.5V
(Internal zener doesn’t work)
I
DD
=0.3~10mA (according to the zener
inside)
Control function normal
F
CLK
= 50Hz
Min
2.0
0.8
-
4.0
1.15
Type
-
1
200
-
1.2
Max
3.0
1.1
400
5.5
1.25
Unit
V
V
A
V
Hour
12-07-0006
3
PT0258-1
07/06/12
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PT8A330x
Ceramic Heating Controller
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Description
Frequency of CLK
Input voltage of CLK Pin
Test Conditions
-
-
Low level , AC=220V/50Hz
V
DD
= 4.5V,
High level, AC=220V/50Hz
V
DD
= 4.5V,
Low level, AC=110V/60Hz
V
DD
= 4.5V
High level, AC=110V/60Hz
V
DD
= 4.5V
Min
-
1.69
-200
-100
-240
-140
Type
50/60
1.88
-250
-150
-190
-90
Max
-
2.07
-300
-200
-140
-60
Unit
Hz
V
mV
mV
mV
mV
Line Clock Synchronization Characteristics
Symbol
F
CLK
V
LEVEL
V
TCLK
Compare Threshold Voltage
of CLK Pin
VB and GATE Pulse Characteristics
Symbol
Tal_VB
Tal_GAT
E
Description
Width of VB pulse
Width of Gate trigger
pulse
Test Conditions
TA=25 º V
DD
= 4.5V
C,
V
DD
= 4.5V
T
A
= -20 ~ 85º
C
TA=25 º V
DD
= 4.5V
C,
V
DD
= 4.5V
T
A
= -20 ~ 85º
C
Min
80
60
160
120
Type
100
-
200
-
Max
120
150
240
300
Unit
s
s
s
s
EMC Electrical Characteristics
Symbol
Description
IEC61000-4-4
Transient/Bursts
Test Conditions
EN/IEC61000-4-4 is Electrical fast transient / burst
immunity test, requirement > 1000V pulse amplitude
(Tr=5ns, Tw=50ns, Z=50 ohms, burst duration 15 ms,
burst period 300 ms, burst frequency 2,5 kHz)
Min
Type
Max
Unit
EFT
2000
-
-
V
PP
Temperature Control Characteristics
Symbol
Description
Normal heat-up
Threshold Voltage
Test Conditions
V
DD
= 4.5V
VREF=0.7V
Test GATE output about 50%
heating power
PT8A330xL
(x: 0~7)
VTH
Fast heat-up
Threshold Voltage
PT8A330xH
(x: 0~7)
Min
Type
0.5(VB- V
REF
)
Max
Unit
VT
-
-
V
VT
V
DD
=4.5V
V
REF
=0.7V
Test GATE
output about
50% heating
power
+0.4%(VB-
V
REF
)
VT
+0.6%(VB-V
REF
)
VT
+0.8%(VB-
V
REF
)
V
VT
+1.9%(VB-
V
REF
)
VT
+2.1%(VB-V
REF
)
VT
+2.3%(VB-
V
REF
)
VT(-
50C)
ON/OFF key
detection Threshold
Voltage on Pin PTC
Input Offset Voltage
of Comparator
Heating cycle time
V
DD
= 4.5V
VREF=0.7V
Test GATE output about 50%
heating power
Pin: PTC
F
CLK
= 50Hz
-
0.27(
VB- V
REF
)
-
200
-
V
V
OS_COMP
T-heat
12-07-0006
-3mV
-
+3mV
-
PT0258-1
mV
ms
07/06/12
4
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PT8A330x
Ceramic Heating Controller
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Input Button
One key:
(Only for PT8A3304/5/6/7(H/L))
The PTC input will toggle Heating-on and Heating-off
key function. Once Heating-on the heater will rise to
the desired temperature.
Two key:
(Only for PT8A3300/1/2/3(H/L))
Have two buttons to toggle Heating-on and Heating-
off respectively.
Constant
(Only for PT8A3301/3/5/7)
The LED will keep lighting after turn-on
Reset
After power on the chip will be reset by POR circuit,
LED is disabled. GATE is low level.
Timer
Once push down the ON button and without pushing
down the OFF button during the heating-on state, the
internal timer will start to count ,After 216000 clock
period, the IC will power off the heater until pushing
down the ON button again. For the 60Hz CLK signal,
the maximal heating time is about 1 hour; and 1.2 hour
for 50Hz ( for PT8A3300/1/4/5).
Function description
One LED Indicator
Flash:
(Only for PT8A3300/2/4/6)
When turn -on, the LED will flash (1.5Hz @50Hz
power CLK) to indicate the heater is being heated, and
keep lighting while reaching the desired temperature
High Current pulse triggering for SCR
LINE 50Hz
LINE 50Hz
POWER
POWER
200uS
200μ S
Tal_GATE
Tal_GATE
a. High trigger peak current (>15mA), enough to trigger 20A SCR
b. Pulse triggering current to reduce the false self trigger by the leakage of SCR at high temperature environment.
c. Tal_GATE = 200us
Timing
50Hz CLK
200μ S
GATE
100μ S
1.2mS
VB
0.8mS
4.8mS
LEVEL
80kOSC_EN
6mS
6mS
12-07-0006
5
PT0258-1
07/06/12
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