Techniques for linear control of inductor current shunt for mitigation of load dump transients in DC-DC regulators

Techniques for linear control of inductor current shunt for mitigation of load dump transients in DC-DC regulators

For inductor-based DC-DC converters, a current shunt switch can provide an alternate path for the inductor current to flow that does not include the output capacitor. An amplifier circuit can be included and coupled with a control node of the current shunt switch to adjust a voltage on the control n...

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Hauptverfasser: Vitunic, Mark Robert, Lu, Jinhuang, Lisuwandi, Eko
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APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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creator Vitunic, Mark Robert
Lu, Jinhuang
Lisuwandi, Eko
description For inductor-based DC-DC converters, a current shunt switch can provide an alternate path for the inductor current to flow that does not include the output capacitor. An amplifier circuit can be included and coupled with a control node of the current shunt switch to adjust a voltage on the control node to control an amount of inductor current diverted away from the output node. A fast linear loop can be included to ensure smooth transitions when engaging or disengaging the current shunt switch. These techniques can minimize the amount and duration of the subsequent negative output voltage excursion, which can be dependent on the specific ESL and ESR values of the output voltage capacitor, for the cases when the final value of the step-down load-transient is not zero. These techniques can improve a positive output voltage response caused by an output load transient in the negative direction.
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subjects APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
title Techniques for linear control of inductor current shunt for mitigation of load dump transients in DC-DC regulators
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