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PT8A3232WEX

P1-P3P4-P6P7-P7
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Heating Controller
12-07-0006 PT0211-6 07/06/2012
1
PT8A3230/1/2/3/4/5/6/7
Features
Dual Voltage (120V/240V) operations
Auto temperature control with NTC
NTC open protection
Multi mode LED indicator
Direct drive SCR
Auto Heating off after heating timer timeout
Low cost 8-Pin DIP and SOIC package
Applications
Hair Curler
Description
The PT8A3230/1/2/3/14/5/6/7 is a mixed signal
CMOS LSI chip designed for the automatic controller of
heat with external NTC (Negative Temperature
Component). NTC open protection is implemented for
device safety. When NTC is open, it will cut off GATE
output to disable heating, and the LED1 will flash at 1/8
CLK.
The device can be used in both 120V and 240V
power line supplier, automatically adjusting the heating
power according to the power line voltage to avoid
heating appliance damage.
Pin Configuration
NTC1
NTC2
C LK
GND ON
GATE
OFF
VDD1
2
3
4 5
6
7
8
IC01-P10/1/2/3
NTC1
NTC2
C LK
GND ON/OFF
GATE
LED
VDD1
2
3
4 5
6
7
8
IC01-14/5/6/7
Pin Description
No.
Pin Name
I/O
Description
PT8A323
0/1/2/3
PT8A323
0/1/2/3
PT8A323
4/5/6/7
1
NTC1
I
I
NTC voltage input, NTC open detection input.
2
NTC2
O
O
Output signal for NTC open detection.
3
CLK
I
I
Clock input from power line.
4
GND
GND
GND
Ground.
5
ON
I/O
I/O
Heating-on button input for PT8A3230/1/2/3 or Heating-
on/off input for PT8A3234/5/6/7 and LED driving output.
6
GATE
O
O
SCR trigger output, active high.
7
OFF
I/O
O
Heating-off button input and LED2 driving output for
PT8A3230/1/2/3 or only LED2 driving output for
PT8A3234/5/6/7.
8
VDD
Power
Power
Power.
PT8A3234/5/6/7
PT8A3230/1/2/3
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12-07-0006 PT0211-6 07/06/2012
2
PT8A3230/1/2/3/4/5/6/7
Heating Controller
Maximum Ratings
Storage Temperature…………………………………………..- 65
o
C to +150
o
C
Ambient Temperature with Power Applied……………………-20
o
C to +85
o
C
Supply Voltage to Ground Potential (Inputs & V
CC
only)……….- 0.5 to +6.0V
Supply Voltage to Ground Potential (Outputs & D/O only) …… - 0.5 to +6.0V
DC Input Voltage …………………………………………- 0.5V to V
CC
+0.5V
DC Output Current ……………………………………………………… 20mA
Power Dissipation……………………………………………………… 500mW
Recommended Operation Conditions
Sym
Pin
Description
Min
Typ
Max
Unit
V
CC
VDD
Supply voltage.
3.5
5.0
5.5
V
f
CLK
CLK
Input clock frequency
-
50/60
-
Hz
T
A
-
Operation temperature
-20
-
85
C
DC Electrical Characteristics
(Unless otherwise noted, V
CC
= 3.5 ~ 5V, T
A
= -20 ~ 85ºC)
Sym
Description
Test conditions
Min
Typ
Max
Unit
I
IH
Input high current
PIN: NTC1, CLK
V
IN
= V
CC
-
-
5
A
PIN: NTC2
V
IN
= V
CC
Output
high impedance
-
-
100
nA
I
IL
Input low current
PIN: NTC1, CLK
V
IN
= GND
-
-
-5
A
PIN: NTC2
V
IN
= 0 Output
high impedance
-
-
-100
nA
I
OH
Output high current
PIN: GATE
V
CC
= 5.0V
Vout = 4.5V
-1.5
-
-
mA
I
OL
Output low current
PIN: NTC2
V
CC
= 5.0V
Vout =0.5V
2.0
-
-
mA
PIN: GATE
2.5
-
-
mA
V
NTC0
Input voltage 0
PIN: NTC1
0.29V
CC
0.31V
CC
0.33V
CC
V
V
NTC1
Input voltage 1
PIN: NTC1
0.37V
CC
0.385V
CC
0.40V
CC
V
NTC2
Input voltage 2
PIN: NTC1
0.39V
CC
0.40V
CC
0.41V
CC
I
CC
Current consumption
NTC1, CLK tied to GND, V
CC
= 5.0V
-
-
250
A
AC Electrical Characteristics
(Unless otherwise noted, V
CC
= 3.5 ~ 5V, T
A
= -20 ~ 85ºC)
Sym
Description
Test conditions
Min
Typ
Max
Unit
f
CLK
CLK frequency
-
-
50/60
-
Hz
Timer
Power off timer
F
CLK
= 50Hz
1.15
1.2
1.25
Hour
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.
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12-07-0006 PT0211-6 07/06/2012
3
PT8A3230/1/2/3/4/5/6/7
Heating Controller
Block Diagram
Function Description
State description
Reset: The device will be at reset state after power-on.
Heating-on: The device will be at heating-on state after heating-on button is pressed.
Heating-off: This device enters heating-off state after its power-on reset or heating timer timeout or heating-off button pressed.
Timer
Once the device enters Heating-on state, internal timer start counting. It reaches timeout state and exit heating-on state after
216000 clock period, that is, the heating time is about 1 hour for 60Hz CLK signal, and 1.2 hour for 50Hz.
Control signal output
When working in Heating-on state, GATE/LED output will be related to NTC input and CLK input amplitude.
Effect of NTC and CLK input voltage on GATE and LED indication
Working
state
Power line
voltage
NTC
(NTC open
detection)
NTC
(normal temp
detection)
GATE
（Trigger of
SCR）
LED （Pin 5）
PT8A3230/2/4/6
PT8A3231/3/
5/7
V
NTC
up
V
NTC
down
ON
240V
NTC<10M(O
hm)
0 ~ V
NTC0
25%
Flash1*
Flash1
On
V
NTC0
~ V
NTC1
12.5%
Flash1
Flash1
On
V
NTC1
~ V
NTC2
On
V
NTC2
~ V
DD
0
On
On
On
120V
0 ~ V
NTC0
100%
Flash1
Flash1
On
V
NTC0
~ V
NTC1
50%
Flash1
Flash1
On
V
NTC1
~ V
NTC2
On
V
NTC2
~ V
DD
0
On
On
On
OFF
X*
X
0
Off
Off
Off
X
X
NTC>20M(O
hm)
X
0
Flash2*
Off
Off
*Note：1）X means any input.
2）Flash1 frequency if 1/32 CLK.
3）Flash2 frequency is 1/8 CLK.
4）LED2(Pin 7)is always in reverse with LED1.
2bit ADC
Controller
NTC2
NTC1
CLK
GATE
OFF (LED)
ON (ON/OFF)
P1-P3P4-P6P7-P7

PT8A3232WEX

Mfr. #:
Buy PT8A3232WEX
Manufacturer:
Diodes Incorporated
Description:
Board Mount Temperature Sensors Heater Controller SO-8 T&R 2.5K
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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