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PT8A335xA/B
Ceramic Heating Controller (LCD)
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
High watt density Alumina Heaters
Pulse trigger with high current for SCR
Quickly Heat-Up and Quickly Lost-Heat Recover
External adjustable to fit wide range heating plates
External adjustable to fit TCR of sensors
Full temperature compensation and insensitive to
environment temperature
Internal zener
11 heat temperature settings
Auto power off for PT8A3351/3/5/7
Backlights for indicating work status
LCD screen for showing temperature setting
Dual Temperature (Fahrenheit/Centigrade) Display
Wet function: It will keep heating on state to level
2.
Dual voltage (120V/240V) operations.
Support 3 keys, on/off, up and down
SOIC-24, QFN-24 and TSSOP-24 package
Description
The PT8A335xA/B is special designed for ceramic
heating control with 11 temperature levels(show as
below function comparison table). It can drive SCR
directly and detect heater temperature by heater-self
without extra temperature sensor. It has 3 keys for
function setting. LCD displays and backlight indicate
the working status. Build-in timer will be auto-power
off after power on 1 hour for 60Hz or 1.2 hour for
50Hz.
Applications
•
Ceramic heating controller
Pin Configuration
SOIC-24/TSSOP-24
QFN-24
12-07-0006
1
PT0281-2
07/06/12
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PT8A335xA/B
Ceramic Heating Controller (LCD)
Pin Description
Pin No.
Name
CLK
L3
L1
L2
L4
L5
SEG1,SEG2,
SEG3,SEG4,
SEG5,SEG6,
COM1,COM
2,
COM3,COM
4
BL
GATE
VB
PTC
REF1
REF2
GND
VDD
SOIC-
24/TSSOP-24
1
2
4
5
6
7
8,9,10,11,12,13
QFN-24
22
23
1
2
3
4
5,6,7,8,9,10
Type
I
I
I
I
I
I
O
Description
Clock input from power line and Detect operation
voltage.
Input to adjust Recovery Rate.
Power on/off key inputs
Up and down key inputs.
High: LCD shows
°F,
Low : LCD shows
°C.
Supply LCD power.
LCD digits control output.
14,15,16,17
18
19
21
22
23
24
3
20
11,12,13,14
15
16
18
19
20
21
24
17
O
O
O
O
I
I
O
Power
LCD digits control output.
Drive LCD backlight
SCR trigger output, active high
PTC sampling power source
Temperature sensor input
Reference 1 for internal comparator
Reference 2 for internal comparator
Ground and Power
12-07-0006
2
PT0281-2
07/06/12
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PT8A335xA/B
Ceramic Heating Controller (LCD)
Block Diagram
CLK
80kHz
rst
PTC
CMP
R1
POR
Line Clk
Sample
50Hz
OSC
stop
Timing
Recover
ADJ
L3
VB
REF1
REF2
GATE
Res
Chain
ptci
vbo
CTRL
LEVEL
Level
Set
KEY
IN
Vlcd
BL
L1 (Up/Dn)
L2(On/Off)
L5
COM1
COM2
COM3
COM4
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
Timer_rst
TIMER
test1
test2
test3
test4
test5
test6
Test
LCD
Driver
F_C select
L4
Maximum Ratings
Storage Temperature ...................................................................................... -55oC to +150oC
Ambient Temperature with Power applied.................................................-20oC to +85oC
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, VB only) ............................... 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
Sym
V
DD
T
A
Parameter
Operating Voltage
Operating temperature
Pin
VDD
-
Min
4.0
-20
Typ
-
-
Max
Vz
85
Unit
V
°C
12-07-0006
3
PT0281-2
07/06/12
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PT8A335xA/B
Ceramic Heat Controller (LCD)
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DC Electrical Characteristics
(V
DD
= 4.0~Vz, T
A
= -20 ~ 85ºC, unless otherwise noted)
Symbol
Description
Test Conditions
PIN: PTC CLK
I
IH
Input high current
PIN: L1,
L2,L3,L4
PIN: PTC CLK
PIN: L3，L4
I
IL
Input low current
PIN: L1, L2
V
IH
V
IL
Vlcd
V
IT
Input High Voltage
Input Low Voltage
Supply LCD power
Input Threshold Voltage
PIN: L1, L2
PIN: L1, L2
PIN: L5
VT1_Level
VT2_Level
PIN: GATE
I
OH
Output High Current
PIN: BL
PIN: GATE
I
OL
Output Low Current
PIN: BL
PIN:COM1,CO
M2, COM3,
COM4, SEG1,
SEG2, SEG3,
SEG4,
SEG,5,SEG6,
PIN: VDD to
VB
PIN: VDD to
REF2
PIN: REF1 to
REF2
V
IN
= V
DD
V
IN
= V
DD
Vclk=5V
(L1, L2, L4 is of
input)
V
IN
= GND
V
IN
= GND
Vclk=GND
(L4 is of input)
V
DD
=4.5V
V
IN
= 2.0V
(L1, L2 is of input)
-
-
-
V
DD
=4.5V
L3
V
DD
= 4.5V
Vout = 2.5V
V
DD
=4.5V
Vout =4.0V
V
DD
= 4.5V
Vout =0.5V
V
DD
=4.5V
Vout =0.5V
Level3, V
DD
=4.5V
Level2, V
DD
=4.5V
Level1, V
DD
=4.5V
VDD=4.5V
Iout = 100mA
VDD=4.5V
Iout = 50uA
VDD=4.5V
Iout = 1mA
Min
-
-
-
-
Type
-
-
-
-50
Max
5
5
-5
-
µA
µA
Unit
-0.06
0.8 V
DD
-
-
3.0
1.2
-15
-3.0
4.0
4.0
0.9VL5
0.6VL5
0.3VL5
-
37.2
-
-
-
-
3.5
1.7
-
-
-
-
VL5
0.66VL5
0.33VL5
-
46.5
-0.20
-
0.4 V
DD
V
DD
4.0
2.2
-
mA
V
V
V
mA
-
-
mA
-
1.1VL5
0.73VL5
3.7VL5
15
55.8
ohm
s
K
ohm
s
K
ohm
s
-
V
LCD
Output High Voltage
R
ON_VB
R
ON_TS
Resistor of switch on
Resistor of Rma_TSet
R
ON_SP
Resistor of Rma_Speed
1
1.5
3.0
Power Supply Characteristics
Symbol
V
POR
I
DD
V
DD
V
Z
TPO
off
Description
Voltage of POR
Current consumption
Supply voltage
Voltage of Zener
Power off timer
Test Conditions
-
No loading, V
DD
=4.5V
Control function normal
I
DD
=500uA~20mA
F
CLK
=60Hz
Min
1.5
-
4.0
4.5
55
Type
-
-
-
5.0
60
Max
2.5
400
V
Z
5.5
65
Unit
V
µA
V
V
Minu
te
12-07-0006
4
PT0281-2
07/06/12
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PT8A335xA/B
Ceramic Heat Controller (LCD)
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Description
Test Conditions
Min
Type
Max
Unit
Line Clock Synchronization Characteristics
Symbol
Level 2
V
T_CLK
Input Threshold
Voltage of CLK Pin
Frequency of CLK
VTL_Level1
VTH_Level1
VTL_Level1
VTH_Level1
-
-
V
DD
=4.5V
VT_Level2 is high
V
DD
=4.5V
VT_Level2 is low
1.7
-200
-100
-125
-40
-
1.88
-250
-150
-175
-90
50/60
2.1
-300
-200
-225
-140
-
mV
F
CLK
Hz
GATE Pulse Characteristics
Symbol
Tal_Gat
e
Tal_VB
Description
Width of Gate trigger
pulse
Width of VB pulse
Test Conditions
TA=25 ºC, V
DD
= 4.5V
V
DD
= 4.0 ~ Vz
T
A
= -20 ~ 85ºC
TA=25 ºC, V
DD
= 5.0V
V
DD
= 4.5 ~ 5.5V
T
A
= -20 ~ 85ºC
Min
160
120
80
60
Type
200
-
100
-
Max
240
300
120
150
Unit
µs
µs
µs
µs
Temperature Control Characteristics
Symbol
T-heat
Description
Minimum Heating cycle
time
Test Conditions
F
CLK
= 50Hz
Min
-
Type
200
Max
-
Unit
ms
EMC Electrical Characteristics
(V
DD
= 4.0 ~Vz, T
A
= -20 ~ 85ºC, unless otherwise noted)
Symbol
Description
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
IEC61000-4-4
Transient/Bursts
2000
-
-
Vpp
12-07-0006
5
PT0281-2
07/06/12
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