台湾致新 G3703R41D USB电源开关和控制器

　　General Description

　　The G3703 is a combination of current-limited USB port power switch with a USB 2.0 high-speed data line (D+/D-) switch and a USB charging port identification circuit. The wide bandwidth data-line switch also features low capacitance and low on resistance, allowing signals to pass with minimum edge and phase distortion. The G3703 monitors D+ and D-, providing the correct hand-shaking protocol with compliant client devices.

　　The G3703 supports the following charging logic schemes:

　　► USB 2.0 BC1.2

　　► Chinese Telecom Standard YD/T 1591-2009

　　► Divider Mode, compliant with Apple devices such as iPod® and iPhone®

　　In addition to charging popular devices, the G3703 also supports two distinct power management features, namely, power wake and port power management (PPM) via the STATUS pin. Power wake allows for power supply control in S4/S5 charging and PPM the ability to manage port power in a multi-port application. Additionally, system wake up (from S3) with a mouse/keyboard (both low speed and full speed) is fully supported in the G3703.

　　High electrostatic discharge (ESD) protection is enhanced on the DP and DM inputs up to ±8kV Human Body Model (HBM).

　　Features

　　► Meets Battery Charging Specification BC1.2 for DCP and CDP

　　► Meets Chinese Telecommunication Industry Standard TD/T 1591-2009

　　► Support non-BC1.2 Charging Modes by Automatic Selection

　　-- D+/D- Divider Modes 2.0V/2.7V and 2.7V/2.0V

　　-- D+/D- 1.2V Mode

　　► Support Sleep-Mode Charging and Mouse/Keyboard Wake Up

　　► Load Detection for Power Supply Control in S4/S5 Charging and Port Power Management in all Charge Modes

　　► USB 2.0 Hi-Speed Data Switch

　　► Integrated 70mΩ Power MOS

　　► Adjustable Current Limit up to 3A (typ.)

　　► Automatic USB Charger Identification Circuit

　　► Automatic Current-Limit Switch Control

　　► ±8kV High ESD HBM Protection on DP/DM

　　► Available in 16-PIN TQFN3X3 Package

　　► UL Certification_#E232223

　　► CB Test Certification by IEC 60950-1:2005 (2nd Edition); Am 1:2009

　　Applications

　　► Notebook Computers

　　► Battery-Powered Systems