Synchronous rectification boosts efficiency by …
texas instruments Incorporated power Management Synchronous rectification boosts efficiency by reducing power loss By Anthony Fagnani Example inputs for this system are a USB port or a lithium- power Applications Engineer ion (Li-Ion) battery pack with two or three series cells. The DC/DC power supply steps up the voltage for charging Introduction a two-cell Li-Ion battery or the battery of a tablet PC. The Some applications require the highest possible power effi- other application boosts the voltage of a system power rail ciency. For example, in a harsh environment that requires to a high output voltage that can operate at higher duty a DC/DC power supply to operate in high ambient temper- cycles where the output voltage is much higher than the atures, low- power dissipation is needed to keep the junc- input voltage. An example input is a 12-V power rail. The tion temperature of semiconductor devices within their high output voltage may be needed for power amplifiers, rated range.
9 Analog Applications Journal Texas Instruments Incorporated 2Q 2013 www.ti.com/aaj High-Performance Analog Products Synchronous rectification boosts efficiency by reducing power loss
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