将FET取代较低成本的BJTS，最高可达10W

iW1679是高性能AC / DC控制器designed to easily and efficiently drive an external, power bipolar junction transistor (BJT) for peak current mode PWM flyback power supplies rated at up to 10W. It replaces MOSFETs with lower-cost BJTs to reduce the BOM cost in 5V/2A power adapters for smart phones, media tablets and consumer electronic products. Additional BOM cost savings come from Dialog’s patented PrimAccurate™ primary-side control technology that eliminates the need for a secondary-side regulator and optical feedback isolator.

IW1679采用数字控制技术主动调制BJT基础电流驱动器，通过将BJT避免饱和来实现性能和提高效率。该器件提供高83％的活跃平均效率，将负载保持高效率为10％，并通过快速响应电力负载变化，实现<30mW无负载待机功率，轻松符合美国DOE外部电源标准及其EU’s Code of Conduct, version 5, tier 2 standard. In addition to BJTs generating lower EMI compared to FETs, the iW1679 uses Dialog’s EZ-EMI® technology that uses valley mode switching to further reduce EMI and reduce the cost of external filtering components. It also includes a proprietary switching mode that results in no audible noise from the controller.