Video ICs Flash-based low-power DisplayPort to VGA adapter
Overview
PTN3356 is a flash-based DisplayPort to VGA adapter optimized primarily for motherboard applications, to convert a DisplayPort signal from the chip set to an analog video signal that directly connects to the VGA connector. PTN3356 integrates a DisplayPort receiver, a high-speed triple video digital-to-analog converter that supports a wide range of display resolutions, for example, VGA to WUXGA.
PTN3356 supports two DisplayPort lanes operating at either 2.7 Gbit/s or 1.62 Gbit/s per lane.
PTN3356 supports I²C-bus over AUX per DisplayPort standard, and bridges the VESA DDC channel to the DisplayPort Interface.
PTN3356 is powered from a 3.3 V power supply and consumes approximately 200 mW of power for video streaming in WUXGA resolution and 410 μW of power in Low-power mode. The VGA output is powered down when there is no valid DisplayPort source data being transmitted. PTN3356 also aids in monitor detection by performing load sensing on RGB lines and reporting sink connection status to the source.
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## Features
### VESA-compliant DisplayPort V1.4 converter
* Main Link: 1-lane and 2-lane modes supported:
* HBR High Bit Rate at 2.7 Gbit/s per lane
* RBR Reduced Bit Rate at 1.62 Gbit/s per lane
* BER Bit Error Rate better than 10-9
* DisplayPort Link down-spreading supported
* 1 MHz AUX channel
* Supports native AUX CH syntax
* Supports I²C-bus over AUX CH syntax
* Active HIGH Hot Plug Detect HPD signal to the source
### VESA-compliant eDP extensions
* Supports Alternate Scrambler Seed Reset ASSR
* Supports Alternate Enhanced Framing mode - Enhanced Framing
### DDC channel output
* I²C-Over-AUX feature facilitates support of MCCS, DDC/CI, and DDC protocols
### Analog video output
* VSIS 1.2 compliance for supported video output modes
* Analog RGB current-source outputs
* 3.3 V VSYNC and HSYNC outputs
* Pixel clock up to 240 MHz
* Triple 8-bit Digital-to-Analog Converter DAC
* Direct drive of double terminated 75 Ω load with standard 700 mV peak-to-peak signals
### General features
* Monitor presence detection through load detection scheme. Connection/disconnection reported via HPD IRQ and DPCD update.
* Wide set of display resolutions are supported:
* 1920 x 1440, 60 Hz, 18 bpp, 234 MHz pixel clock rate
* 2048 x 1152, 60 Hz reduced blanking, 24 bpp, 162 MHz pixel clock rate
* 2048 x 1536, 50 Hz reduced blanking, 24 bpp, 167.2 MHz pixel clock rate
* WUXGA: 1920 x 1200, 60 Hz, 18 bpp, 193 MHz pixel clock rate
* WUXGA: 1920 x 1200, 60 Hz reduced blanking, 24 bpp, 154 MHz pixel clock rate
* UXGA: 1600 x 1200, 60 Hz, 162 MHz pixel clock rate
* SXGA: 1280 x 1024, 60 Hz, 108 MHz pixel clock rate
* XGA: 1024 x 768, 60 Hz, 65 MHz pixel clock rate
* SVGA: 800 x 600, 60 Hz, 40 MHz pixel clock rate
* VGA: 640 x 480, 60 Hz, 25 MHz pixel clock rate
* Any resolution and refresh rates are supported from 25 MHz up to 180 MHz pixel clock rate at 24 bpp, or up to 240 MHz pixel clock rate at 18 bpp
* Bits per color bpc supported
* 6, 8 bits supported
* 10, 12, 16 bits supported by truncation to 8 MSBs
* All VGA colorimetry formats RGB supported
* Power modes:
* Active-mode power consumption: ~200 mW at WUXGA, 1920 x 1200, 60 Hz 18 bpc
* 410 μW at Low-power mode
* Supports flexible choice of timing reference:
* On-board oscillator with external crystal, ceramic resonator
* Different frequencies supported: 24 MHz, 25 MHz, 27 MHz
* ESD protection: 7.5 kV HBM
* Single power supply 3.3 V for easy integration in the platforms
* Commercial temperature range: 0 °C to 85 °C
* 32-pin HVQFN, 5 mm x 5 mm x 0.85 mm nominal; 0.5 mm pitch; lead-free package
## Target Applications
* Notebook computers, tablets and desktop PCs
* Dongles, adapters, docking stations
## Features