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Pericom Semiconductor

PT8A3254 Datasheet Preview

PT8A3254 Datasheet

Ceramic Heating Controller

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PT8A3252/54
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5LED Ceramic Heating Controller
Features
Description
Pulse trigger with high current for SCR
Quickly Heating-Up and Quickly Lost-Heat-
Recover
External Adjustable to fit wide range heating plates
External Adjustable to different TCR of sensors
Full temperature compensation and insensitive to
environment temperature
5 Heat Temperature Settings
Auto power off (only for PT8A3252)
Over Temperature protection
DIP-16 and SOIC-16 packages
Applications
Ceramic Heating Controller
High watt density Alumina Heaters
The PT8A3252/54 is specially designed for ceramic
heating control with 5 internal level of 130C, 145C,
160C, 175C, 190C. And the temperature range can be
adjusted from 100C to 250C by external series
resistance. It can drive SCR directly and detect heater
temperature by heater-self without extra temperature
sensor. It has 3 keys for function setting, 5 LEDs for
working status indication. The PT8A3252 has an
internal timer; it timeouts and device will stop heating
automatically after 216000 clock period, ie. 1 hour for
60Hz and 1.2 hour for 50Hz. The circuit of Over-Heat
Protection will be working for safety when heater
temperature reached to 250C. The chip is packaged in
lead free DIP-16 and SOIC-16.
Pin Configuration
L4 1
C1 2
C2 3
REF2 4
REF1 5
PTC 6
GATE 7
OT 8
PT8A3252/54
16 L3
15 L2
14 L1
13 VDD1
12 VDD2
11 VB
10 GND
9 CLK
12-07-0006
PT0233-1 07/06/12
1




Pericom Semiconductor

PT8A3254 Datasheet Preview

PT8A3254 Datasheet

Ceramic Heating Controller

No Preview Available !

||||||||||||||||
PT8A3252/54
5LED Ceramic Heating Controller
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pin Description
Pin No. Pin Name I/O
Pin Description
1 L4 I/O Adjust input and LED output.
2 C1 O LED scan common driver.
3 C2 O LED scan common driver.
4 REF2 O Reference 2 for internal comparator.
5 REF1
I Reference 1 for internal comparator.
6 PTC
I Temperature sensor input.
7 GATE O SCR trigger output, active high.
8 OT O Over heat output.
9 CLK
I Clock input from power line.
10
GND
GND Ground.
11 VB
O PTC sampling power source.
12
VDD2
Power Power.
13
VDD1
Power Power.
14 L1 I/O On/Off key input and LED output.
15 L2 I/O Down key input and LED output.
16 L3 I/O Up key input and LED output.
Block Diagram
VB
PTC
REF1
REF2
CLK
Comp
Ref Select
Comp
Logic
Co n t ro l
OSC
C1
C2
L1
L2
L3
L4
GAT E
OT
12-07-0006
PT0233-1 07/06/12
2


Part Number PT8A3254
Description Ceramic Heating Controller
Maker Pericom Semiconductor
Total Page 7 Pages
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