摘要： USB接口的便携设备充电，传输数据时的能力。但对于高容量的电池， USB主机和集线器的有限输出电流大大延长充电时间。供电的USB集线器和USB主机提供高达500mA 。未通电的USB集线器提供不超过100mA 。可以提供一个独立的AC适配器充电电流。最方便的解决方案，无论从USB端口或AC适配器。用户可以从笔记本电脑USB端口充电行驶时，使用AC适配器，其更快的电荷，当在家中或办公室。Maxim > App Notes > BATTERY MANAGEMENT POWER-SUPPLY CIRCUITS
Keywords: USB charger, Lithioum Ion charger, Li charger Dec 10, 2002
APPLICATION NOTE 1815
Add Current Boost to USB Charger Driven by an AC Adapter
Abstract: A USB interface is capable of charging a portable device while transferring data. But for high-capacity
batteries, the limited output current of USB hosts and hubs greatly extends the charging time. Powered USB
hubs and USB hosts supply up to 500mA. Unpowered USB hubs supply no more than 100mA. A separate AC
adapter can supply charging current. The most convenient solution works from either the USB port or an AC
adapter. The user can charge from a notebook USB port when traveling, and use the AC adapter, with its faster
c……
