USB CONTROLLER ESD PROTECTION APPARATUS AND METHOD

摘要

USB interface and charging port controller integrated circuits and systems are presented for interfacing USB power and data signaling with a host circuit, in which an ESD protection diode is integrated in the IC, having an anode connected to a data terminal of the IC and a cathode connected to the positive USB bus voltage terminal for directing ESD transient current from the data terminal to the USB bus voltage terminal for dissipation to an external bus capacitance connected between the USB bus voltage terminal and a USB ground node on a host system circuit board.

主权项

1. An integrated circuit for interfacing Universal Serial Bus (USB) power and data signaling with a USB host circuit, the integrated circuit comprising:
a first power terminal for electrical coupling with a first power connection of a host circuit board to a USB bus voltage terminal of a USB connector on the USB host circuit board to provide a positive bus voltage; a second power terminal for electrical coupling with a second power connection of the host circuit board to a USB ground terminal of the USB connector; a first data terminal for electrical coupling with a first data connection of the host circuit board to a first USB data terminal of the USB connector; and a first diode formed in the integrated circuit and comprising an anode electrically connected to the first data terminal, and a cathode electrically connected to the first power terminal.