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IES5521A - Simple Zero Crossing Triac Control Circuit

Description

The IES5521A is a derivative of the OM1654A, but offering the extra safety feature of a nominal 1 hour time-out.

This is a key safety requirement for a range of personal and home appliance applications.

Features

  • Time-out function stops triac operation after a set time.
  • Reset time-out by turning mains supply off and on.
  • Low external component count.
  • Constant ON cycle time, with proportional OFF time.
  • All ON cycles consist of an integral number of mains cycles.
  • No DC component in the mains supply.
  • On chip circuit protection against triac gate spikes.
  • Low supply current requirement.
  • Sensor AC powered, thus minimising DC su.

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Datasheet preview – IES5521A

Datasheet Details

Part number IES5521A
Manufacturer IES
File Size 968.21 KB
Description Simple Zero Crossing Triac Control Circuit
Datasheet download datasheet IES5521A Datasheet
Additional preview pages of the IES5521A datasheet.

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Full PDF Text Transcription

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ing and F b ab ing IC’s fo ver ro Integrated Electronic Solutions 35 ars Ye Simple Zero-Crossing Triac Control Circuit with Adjustable Time-out 3 GENERAL DESCRIPTION The IES5521A is a derivative of the OM1654A, but offering the extra safety feature of a nominal 1 hour time-out. This is a key safety requirement for a range of personal and home appliance applications. The time-out function will stop the triac operation and thus prevent power from being applied to the heating elements. Time-out can be accurately controlled from the AC supply frequency for a period of 1 hour (60Hz, or 71minutes at 50Hz), or can be adjusted by adding external resistor and capacitor components to set the frequency of an on-chip RC oscillator.
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