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PT8A3254 Dataheets PDF



Part Number PT8A3254
Manufacturers Pericom Semiconductor
Logo Pericom Semiconductor
Description Ceramic Heating Controller
Datasheet PT8A3254 DatasheetPT8A3254 Datasheet (PDF)

||||||||||||||||||||||||||||||||||||||||||||||||||| PT8A3252/54 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| 5LED Ceramic Heating Controller Features Description  Pulse trigger with high current for SCR  Quickly Heating-Up and Quickly Lost-Heat- Recover  Exte.

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||||||||||||||||||||||||||||||||||||||||||||||||||| PT8A3252/54 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| 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 130C, 145C, 160C, 175C, 190C. And the temperature range can be adjusted from 100C to 250C 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 250C. 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 |||||||||||||||| 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 |||||||||||||||| PT8A3252/54 5LED Ceramic Heating Controller ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Maximum Ratings StorageTemperature...................................................................................-55oC to +150oC Ambient Temperaturewith Power applied...............................................-20oC to +85oC SupplyVoltage to Ground Potential(Input & VDD Only).........................-0.5Vto+6.5V SupplyVoltage to Ground Potential(Output s Only)................................-0.5Vto+6.5V DC Input Voltage .............................................................................................-0.5Vto +6.5V Input/Output Current................................................................... 50mA Input/Output Current (Pin VDD2, 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 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. Recommended operation conditions Sym VDD TA Parameter Operating Voltage Operating temperature Pin Min Typ Max Unit VDD1, VDD2 4.0 5.0 6.0 V - -20 - 85 °C DC Input Electrical Characteristics Symbol Description Test Conditions PIN: PTC, CLK VIN = VDD IIH Input high current PIN: L1, L2, L3, VIN = VDD (L1, L2, L3, L4 is of L4 input) PIN: PTC, CLK PIN: L4 VIN = GND VIN = GND (L4 is of input) IIL Input low current VDD =5.0V PIN: L1, L2, L3 VIN = 2.0V .


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