Diodes Incorporated
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Heating Controller

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Product Description

The PT8A3299/3289 is a mixed signal CMOS LSI chip designed as heating controller with help of external NTC (Negative Temperature Component). NTC open protection is implemented for device safety.

  • Auto heating-off after heating timer timeout.
  • Auto temperature control: maintains user selected temperature.
  • 120V/240V Dual-voltage.


  • Dual Voltage (120/240V) operations
  • Internal 5V Zener
  • Auto temperature control with NTC
  • NTC open protection
  • Multi mode LED indicator
  • Pulse trigger for high current SCR/TRIAC
  • Auto Heating off after heating timer timeout (1.2h at 50Hz and 1h at 60)
  • Low cost 8-Pin DIP/SOIC package


  • Curler
  • Straightener


Product Specifications

Product Parameters

Heating Element Mica/PTC
LED @ Heater On Flash
Auto Off Yes
On/Off Key One Key (ON-OFF)
Driver Type SCR/Triac

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Technical Documents

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Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

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