STEVAL- PCN001V1 USB电源开关演示板

GY@艳

STEVAL- PCN001V1 USB电源开关演示板。该演示板采用了单片机，可编程稳压器，MOSFET ，开关和各种电阻网络。主板上的调节器，可以被配置成通过从电阻网络中选择合适的电阻，以提供各种电压目前在调节器的调节引脚。The purpose of this board is to demonstrate the features and capabilities of the ST204x and ST205x USB power switches developed by STMicroelectronics, using a Windows?-based host software application and one of several USB low-speed microcontrollers from ST acting as a peripheral device. The host software and the ST7 source code provides a clear picture of the power switch capabilities. The USB communicationbetween host and the device is done through a HID class based protocol developed specifically for demonstration board applications. The demonstration board incorporates a microcontroller, programmable voltage regulator, MOSFETS, switches and various resistive networks. The on-board regulator can be configured to supply various voltages by selecting appropriate resistance from the resistive networkpresent at the adjust pin of the regulator. Different voltages and loads can be selected from the PC software, as well as through switches present on the board. LEDs are provided on the board to indicate the various combinations of input voltage ?and load applied to the power switch. The board has an ICC connector to program the?microcontroller Flash memory. An external 12 V charge pump is also provided on the board to allow the user to perform in-application programming (IAP) of the microcontroller embedded Flash program memory. Any type of real load (e.g. USB speakers) can be powered from this board by plugging in the connector present on the board.