Description

VIA Lab’s VL109 is a highly integrated 3-Port USB Power Delivery 3.1 controller designed for USB-C multi-function docks with charge-through capability. In typical case, these three DRP ports are configured to one charging UFP and two DFPs. Through the charging UFP, VL109 can execute video output functionality by DP Alt-mode or USB4 DP Tunneling, while simultaneously charging the connected PD host once external power is detected. Through the two DRP DFPs, they can either connect to a USB-C power adapter to charge the PD host or link to USB-C devices for data transfer. The UFP and two DFPs all support the latest USB PD 3.1 EPR specification, capable of handling up to 48V at 5A (240W). Either DFP port can charge the host on a first-plug-in, first-serve basis. VL109’s Device Policy Manager can negotiate power rules between its DFP and UFP, enabling power charge-through. Charging a host under dead battery mode and fast role swap are both supported. The USB Billboard device function is included to meet the “VESA DP Alt-Mode on USB Type-C” specification. VL109 also supports a smart auto-standby feature that automatically enters a deep power-saving mode when the connected interface is in an idle state, making it suitable for smartphone and mobile accessories.    With a built-in trimmed RC oscillator, linear voltage regulators, Vbus voltage detectors, and up to 8 channel ADC, VL109 can operate perfectly on Vbus power, monitoring abnormal power behavior and implementing OCP, OCP, and OTP safety protections. Up to 20 GPIO pins are available for specific application usage. The SPI interface can support an external SPI flash or share an SPI flash with VLI Hub/PCON controller for firmware upgrades. The firmware update process can occur through either USB Billboard/Virtual HID or I2C slave interface. VL109, with all CC pins bonded to Rd, is available in QFN 60L (7x7x0.85 mm) which supports three DRP ports, and in QFN 48L (6x6x0.85 mm) which supports two DRP ports. VL109S, with all CC pins floated to Rd, is also available for self-powered applications. Please refer to the Package Top Side Marking section for more details.

Block Diagram

Key Features

• CC Logic & PD 3.1 Engine – supporting up to three DRP ports – Compliant to USB Type-C Cable and Connector Specification Release 2.2
  - Compliant to USB Power Delivery Specification Revision 3.1 Version 1.4
  - Integrated Type-C transceivers, DRP port that operates as either a Source or Sink
  - Built-in pull-up/pull down resistors, including Rp, Rd, and Ra
  - Built-in Vconn power switch up to 1.5W
• DP Alt-mode Configuration – Compliant to VESA DisplayPort Alt Mode on USB Type-C Standard Version 2.0
  - DP mode Discovery/Enter/Exit; DP configure, status update, source/sink connection detection
• USB-C Charging UFP Capability
  - Charging connected PD hosts once external power is available
  - Support Provider and Consumer roles
  - Support PD Power Rule up to EPR 240W
  - Support dead battery charging and Fast Role Swap
• USB-C DRP DFPs Capability
  - Support Provider and Consumer roles
  - Support PD Power Rule up to EPR 240W as Sink and 15W as Source
  - Configured to two DFP ports can charge host by first-plugin-first-serve basis, the other port is then set to source mode only
• USB Interface and USB Billboard Device
  - USB Billboard compliant to USB Device Class Definition for Billboard Devices Revision 1.22
  - Integrated in-house USB 2.0 Full-speed PHY

• Fast 8051 Macro Cell 80C32-Compatible Microcontroller
  - Standard 1T 8051 instruction sets with embedded Mask ROM and SRAM
  - Support dynamic code swap for flexible FW coding
  - Support external SPI flash or sharing SPI flash with VLI Hub/PCON controller for firmware upgrade
  - Support FW update through USB Billboard/Virtual HID and I2C slave interface
• Built-in Oscillator, Voltage Regulators, Voltage Detector, and 8-CH ADC
  - Built-in trimmed RC oscillator
  - 5.0V-to-3.3V LDO and 3.3V-to-1.8V LDO
  - Vbus Voltage Detector for USB PD state machine
  - 8 channel 8-bit ADC for OVP/OCP/OTP and power adapter detection
• Smart Auto-standby
  - Automatically entering deep power saving mode when connected interface is in idle state
• GPIOs for Special Function and Control
  - 20 GPIOs on QFN60 and 14 GPIOs on QFN48 for application customization
  - 8 channel ADC on QFN60 and 6 channel ADC on QFN48; can be configured to GPIO when ADC is not used
  - One I2C master interface shared with GPIO and one dedicated I2C slave interface
• Physical
  - QFN 60 green package (7x7x0.85 mm) for VL109-Q6 and VL109S-Q6
  - QFN 48 green package (6x6x0.85 mm) for VL109-Q4 and VL109S-Q4
• Certification
  - USB-IF USB PD 3.1 EPR Certification TID: 9976
• Applications
  - USB-C USB4/DP alt-mode docking stations