Timeline for MC34063 inverter stops switchng at low current and burns out through inductor
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Mar 8, 2018 at 12:43 | comment | added | Indraneel | I have no idea. It's a tiny cylindrical black one with two leads sticking out from one side, wrapped in heat shrink. It heats up a lot with 800mA DC, but working fine and cool at 300-400mA 30-130KHz. Since the entire circuit is working fine now, it is not an inductor issue (both core material and wire gauge are OK). I've only tried with the 1mH one, although simulations (with load) suggest even 330uH should be fine. My working circuit has 330pF timing cap and 1Ohm Rsc, runs at 130KHz till voltage is achieved, and then drops to 75KHz. 1KOhm 1W load resistor at -15V. | |
| Mar 7, 2018 at 20:13 | comment | added | Chupacabras | What's the current capability of that inductor? | |
| Mar 7, 2018 at 19:55 | history | edited | Indraneel | CC BY-SA 3.0 |
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| Mar 7, 2018 at 19:38 | vote | accept | Indraneel | ||
| Mar 5, 2018 at 0:56 | history | edited | Indraneel | CC BY-SA 3.0 |
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| Mar 5, 2018 at 0:41 | history | edited | Indraneel | CC BY-SA 3.0 |
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| Mar 4, 2018 at 23:31 | comment | added | user105652 | If you wanted a -15 volt output then your Schottky diode is reversed. Also, read the comment by Andy aka. | |
| Mar 4, 2018 at 21:36 | answer | added | analogsystemsrf | timeline score: 1 | |
| Mar 4, 2018 at 21:23 | comment | added | Andy aka | Breadboard + switching regulator = likliehood of failures | |
| Mar 4, 2018 at 20:49 | history | edited | Indraneel | CC BY-SA 3.0 |
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| Mar 4, 2018 at 20:39 | history | asked | Indraneel | CC BY-SA 3.0 |