This paper proposes temperature-independent load sensor (LS), optimum width controller (OWC), optimum dead-time controller (ODC), and tri-mode operation to... Huang, H.-W,Chen, K.-H,Kuo, S.-Y - IEEE Journal of Solid-State Circuits 被引量: 223发表: 2007年 A high-efficiency PWM DC...
They also offer low output ripple characteristics and high efficiency during moderate- to high-load conditions. However, PWM converters suffer from very poor conversion efficiency at light-load or standby conditions.Upal Sengupta
mode operation. At light load, the IC operates in the PFM mode to reduce the switching losses. At heavy load, theIC works in PWM.The CXSD62159 is also equipped with Power-on-reset, softstart, soft-stop, and whole protections (under-voltage,over-temperature, and current-limit) into a ...
A new PWM PFM control technique for improving efficiency over wide load range
A 750mA output current,high stability,high efficiency step-down DC-DC converter with pulse-width modulation and pulse-frequency modulation modes is presented.Under nominal load current(80mA),the converter operates in PWM mode with a fixed switching frequency of 1MHz.At light load current(80mA),...
At light load, the device can operate in Power Save Mode with pulse-frequency-modulation (PFM) to improve the efficiency while keeping a low output voltage ripple. For very noise sensitive applications, the device can be forced to PWM Mode operation over the entire load range by pulling the ...
converter allows the use of small external components, such as ceramic input and output caps, as well as small inductors.CXSD6222 also employs a proprietary control scheme that switches the device into a power save mode during light load, thereby extending the range of high efficiency operation....
datasheets.AconverteroperatinginpowersavemodeusesPFMatlightloadcurrentsandpulsewidth modulation(PWM)atheavierloadcurrents.Thistypeofoperationallowstheconvertertomaintainhigh efficiencyoverawiderangeofoutputcurrent.Figure1andFigure2displaytwographscomparingthe
The CXSD62158 is equipped with an automatic PFM/PWM mode operation. At light load, the IC operates in the PFM mode to reduce the switching losses. At heavy load, the IC works in PWM. The CXSD62158 is also equipped with Power-on-reset, softstart, and whole protections (over-temperature...
Traditionally, the regulators 194 (e.g., a buck regulator and a flyback regulator) use pulse frequency modulation (PFM) mode under light load conditions and switch to pulse width modulation (PWM) mode for heavy loads. However, using multiple control modes may result in more analog circuits ...