Again, because the output capacitance energy is recycled, the turn-off energy in circuits with ZVS turn-on is calculated as the difference between the datasheet (hard switched) turn-off energy E off minus the output capacitance energy corresponding to the switched voltage. It is however possible to measure the output capacitance and therefore to calculate its energy stored after turn-off. It is impossible to measure these currents separately during turn-off only the total is measured and used in turn-off energy calculations of the datasheet. During turn-off, some of the drain current flows through the FET channel and creates heat, while the remainder of the current charges the output capacitance. This is different from hard switching where output capacitance energy becomes lost (as heat) in the FET as it switches on. In circuits with zero drain-source voltage turn-on (ZVS), this output capacitance energy is recycled to the load and/or input capacitance. When a FET turns off and voltage across it increases from near zero to its steady off-state voltage, energy is stored in the output capacitance. Go to Corporate Social and Environmental Responsibility.People Power and Qorvo Deliver Smart Internet of Things Systems.New Wireless LED Driver Platform Advances and Future Proofs Commercial Lighting Applications.AC Propulsion Power Module for 200kW Drive Unit Inverter.Pre-Switch CleanWave200 DC to AC Power Block.Internet of Things For Dummies® 2nd Edition.A Comprehensive Guide to mmWave Solutions.Ultra-Wideband & CCC® Digital Key E-Guide.AC/DC & High-Voltage DC/DC Power Supplies.Corporate Social and Environmental Responsibility.
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