Editing Switching regulator
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There are at least 4 ways of dealing with this fact: | There are at least 4 ways of dealing with this fact: | ||
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* ignore it, and be very, very careful that you never overload the output. (This is usually fine if the regulator and the device it powers are hard-wired to each other in a way that makes it difficult to add more stuff or short the outputs together). | * ignore it, and be very, very careful that you never overload the output. (This is usually fine if the regulator and the device it powers are hard-wired to each other in a way that makes it difficult to add more stuff or short the outputs together). | ||
− | * | + | * design the regulator to measure the output current with some [[current sense]] method, and when it gets close to the current setpoint, the regulator automatically reduces the amount of power transferred to the output. When the output looks like a short circuit, allow exactly the setpoint current to flow. (current limit) |
* design the regulator to measures the output current, and if it ever goes even a tiny amount over the current setpoint, the regulator assumes something has gone horribly wrong, and automatically turns off all output power for a second or so. | * design the regulator to measures the output current, and if it ever goes even a tiny amount over the current setpoint, the regulator assumes something has gone horribly wrong, and automatically turns off all output power for a second or so. | ||
− | * | + | * foldback ... ''add description here'' |
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* Use a "intelligent switch"[http://www.st.com/ips][http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/CD00003916.pdf][http://www.irf.com/product-info/ips/] that automatically turns itself off if it gets too close to failure. | * Use a "intelligent switch"[http://www.st.com/ips][http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/CD00003916.pdf][http://www.irf.com/product-info/ips/] that automatically turns itself off if it gets too close to failure. | ||
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* Lloyd H. Dixon, Jr. [http://www.ti.com/lit/ml/slup076/slup076.pdf "Design of Flyback Transformers and Filter Inductors: for switching power supplies"]. | * Lloyd H. Dixon, Jr. [http://www.ti.com/lit/ml/slup076/slup076.pdf "Design of Flyback Transformers and Filter Inductors: for switching power supplies"]. | ||
* Lazar Rozenblat. [http://www.smps.us/ "Lazar's power electronics guide: SMPS switching power supply design basics: circuits, schematics, electrical engineering reference, software and other info"]. | * Lazar Rozenblat. [http://www.smps.us/ "Lazar's power electronics guide: SMPS switching power supply design basics: circuits, schematics, electrical engineering reference, software and other info"]. | ||
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[[category:Components]] | [[category:Components]] |