VIA Lab’s VL105 is a highly integrated single chip DisplayPort Alt-mode and Power Delivery 3.0 controller for USB-C devices designed for USB-C multi-function docks with charge through and interchangeable charge through audio dongles. Integrated USB-C charging UFP, VL105 can perform DP Alt-mode video output functionality and simultaneously charging connected PD host once external power is detected. Two integrated USB-C DRP DFPs can either connect to USB-C power adapter to charge PD host or connect to USB-C devices to access data transfer. D+/D- charging ePHY is integrated on both DRP DFPs to support chargers using D+/D- to do protocol handshake. Either DFP port can charge host by first-plugin-first-serve basis. VL105’s Device Policy Manager could negotiate power rules between its DFP and UFP then enable power charge through. Charging a host under dead battery mode and PD 3.0 fast role swap are supported. A proprietary design for USB D+/D- routing is implemented by first-plugin-first-serve basis to support interchangeable charge through audio. SBU switch is built-in to support USB-C cable flipping feature and can support USB-C analog audio. USB Billboard device function is included to meet “VESA DP Alt-Mode on USB Type-C” spec. VL105 also support smart auto-standby that automatically entering deep power saving mode when connected interface is in idle state which is suitable for smart phone accessories.
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