Dc dc converter negative

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Introduction Many of us have had the experience where we purchased a dc-dc converter and it worked perfectly; ideally this is the norm.

Figure 1: Typical dc-dc converter application In order to simplify this discussion, we will consider a constant impedance load applied to the output of the dc-dc converter. Figure 2: Constant impedance load applied to a dc-dc converter Negative Resistance With this style of load, as the input voltage applied to the dc-dc converter rises the input current falls and as the input voltage applied to the converter falls the input current rises.

Figure 3: Positive and negative Resistance Oscillations We will now discuss one of the potential effects of having a negative incremental input resistance.

Figure 4: Ideal L-C circuit and associated voltage or current waveform continuous sinusoid In real circuits with capacitors and inductors, there is also parasitic resistance associated with the components.

Thanks in advance. Tags: Learning and Information , General Electronics. Posted by ka7ehk : Mon. Last Edited: Mon. Log in or register to post comments Top.

Posted by Kartman : Mon. That is much bigger than the 3 you quoted, above. Jan 30, - PM Reply to 3. Thanks Karman, R21 is 15ohm I forget to edit it in schematic. Jan 30, - PM Reply to 5. Thanks ka7ehk, I also use spice and everything seems to be OK. The Positive part. Jan 30, - PM Reply to 9. See inside MC, I suppose that its internal transistor Q2 do the job. Wouldn't it be OK? Jan 30, - PM Reply to Level: Posting Freak. Posted by angelu : Mon. Pin 1 is connected to pin 8.

Do you have a part number for L4? A picture of the circuit? Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Helping communities build their own LTE networks. Podcast Making Agile work for data science. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked 1.