Power supply designs for 45W and 12W Ultrabook adapter

Dialog Semiconductor plc has announced its new power supply reference designs for thin 45W and 12W travel-size power adapters that can be used with an Ultrabook. Dialog claims its 45W design enables Ultrabook power adapters that are less than one-half the overall volume and approximately 50% thinner than conventional 45W adapters. The 12W design enables the first compact, pocket-size adapters for an Ultrabook at just 68mm x 68mm x 17mm thick, with a typical charge time under five hours, says Dialog. Dialog’s 45W and 12W designs support Intel Turbo Boost Technology with 82W peak power capability at 10% duty cycle for the 45W adapter and 2% for the 12W adapter. They also meet proposed European CoC version 5(1) and U.S. DoE(2) regulations. 45W design offer 90% active average efficiency and no-load stand by power consumption of <100mW. The 12W design provides 86% active average efficiency and no-load stand by power of <50mW . Both designs also said to maintain high efficiency at loads as light as 10% and fast switching from stand by mode to active mode. The 45W is designed using Dialog’s iW1762 digital pulse width modulation (PWM) controller in a PCB which fits in a 61 cubic centimetre (cc) adapter case and is up to one-half the size of conventional 45W power adapters, which can be as large as 168cc, or more. The 12W design uses Dialog’s iW1760 PWM controller in a PC bo...