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Discussion in ‘General Electronics Discussion’ started by autominus, Feb 16, What is the frequency of IR in this circuit? Search Forums Recent Posts. Feb 16, 1.

Hi, Datssheet is the frequency of IR in this circuit? Thank you in advance for your help. Feb 16, 2. I get the same answer using those values, but that first schematic is not using the oscillator in the simple way that’s shown in the second schematic, which is the design that the formula applies to.


IR Datasheet(PDF) – International Rectifier

The IR data sheet doesn’t say much about the oscillator, but it does include an equivalent schematic: Where did you get that first schematic in post 1?

Can you provide a link to the source? Is there a circuit description?

Most importantly, what is the control signal that feeds the base of Q4 in the bottom left corner? Feb 17, 3.

This is a link to circuit description and schematic: Signal that feeds the base of Q4 is from pickup coil reluctor trigger.

Feb 17, 4.

High Voltage-Current Half Bridge Driver Using IR2153 & IGBT

OK, in that design, the oscillator in IC2 pins 2 ir155 3 is used slightly differently from normal, but during the multi-spark period, as explained in the section titled “Multi-sparking”, its frequency is determined by the 4.

We can split out the calculation of the high and low periods. One period is 0. These work out to That figure is approximate, but I would expect to see a frequency between and Hz assuming tight component tolerances.

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IR Datasheet PDF –

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