Diodes AP3917B通用AC高压输入电源解决方案
Diodes公司的AP3917B/C/D是通用AC高压输入(90-265VAC)降压功率开关器,和单绕组电感工作,集成了650V(AP3917B/C)或700V(AP3917D) MOSFET,使得它可以用较少的外接元件,从而获得低材料清单(BOM)成本的解决方案.AP3917B/C/D可以得到极好的调节性能和高的功率效率.当负载降低时峰值电流和开关频率连续降低,这样在轻负载时就能得到极好的效率性能,从而提高了整个系统的效率.AP3917B/C/D还有多种保护特性,以增强系统安全性和可靠性.它具有超温保护,欠压锁住功能,输出短路保护,过载保护和开路保护.AP917B/C/D的额定输出电流为170/270/370mA(最大值),无负载功耗小于30mW(带外接偏压).主要用在隔离和非隔离家用电器.本文介绍了AP3917B主要特性,框图,典型应用电路图以及评估板AP3917B EV3主要特性和系统性能,电路图,材料清单,变压器电路图和PCB设计图.
The AP3917B/C/D is a universal AC high-voltage input, step-down power switcher. The main applications are especially suited for home appliance and IoT applications with a non-isolated buck solution or offline flyback solution.
Working with a single-winding inductor and integrating a 650V(AP3917B/C) or 700V(AP3917D) MOSFET internal can make the device use fewer external components and create a low bill of material (BOM) cost solution.
The AP3917B/C/D can achieve excellent regulation and high power efficiency. The peak current and switching frequency continuously reduce as the load decreases, so it can get excellent efficiency performance at light load and improve the overall system efficiency.
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