We present a high efficiency buck DC-DC converter for switch-mode Lithium-ion (Li-ion) battery charger. To achieve a high efficiency over a wide load range, the converter enters a power saving pulse-frequency modulation (PFM) mode at light load currents. And the proposed buck converter featu...
For wide range of load current variation,PWM and PFM mode show their merits in heavy and light load application respectively.Thus multimode DC-DC converter switches smoothly between them should be taken into account.Motivated by the concerns above,a high-efficiency,low-power DC-DC converter with ...
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),...
The CXSD62501 is a high efficiency 3MHz synchronous step down DC/DC regulator IC capable of delivering up to0.6Aoutput current. It can operate in PFM or CCM mode during light load programed by MODE pin. It can operate over a wide input voltage range from 1.85V to 5.5V and integrate ...
提出了一种输m电流可达750mA,脉宽调制(PwM)和变频调制(PFM)双模式控制的,高效率、高稳定性直流.直流降压转换器.该转换器在负载电流大于80mA时,采用开关频率为lMHz的PwM工作模式;在负载电流小于80mA时,采用开天频率减小和静态电流降低的PFM工作模式,实现了在整个负载电流变化范围(0.02～750mA)内,转换器均保持高效率...
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100% duty cycle for low dropout operation,extending battery life in portable system. This device offers two operation modes,PWM control and PFM Mode switching control, which allows a high efficiency overthe wider range of the load. The CXSD61038A CXSD61038B is offered in a low profile (1mm...
Mode Switching Technique for High Efficiency Buck Converter In order to achieve high efficiency in a wider load range, a PWM/PFM/Power-Saved mode dc–dc buck converter is proposed. The mode switching technique is ba... X Xiao,J Guo,C Chang,... - 《Journal of Circuits Systems & Computers...
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The CXSU63135 is a PWM/PFM, high-efficiency, and stepup DC-DC converter with an integrated LDO input switch for dual mode application. During battery mode operation, the CXSU63135 acts as synchronous rectifier and step-up DC-DC converter with a fixed or adjustable output voltage. When the...