PT8A3252WE Diodes Incorporated

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