company blog about Rockchip RK628D Video Bridging Chip: Multi-Screen Commercial Displays and 4K Video Capture Applications

Shenzhen Mingjiada Electronic Components Distributor Offers Rockchip RK628D Video Bridge Chip in Stock: A Core Solution for Multi-Screen Commercial Displays and 4K Video Capture Applications

In the field of multimedia display and video transmission, the lack of unified interface standards has long been a major challenge in product design. Rockchip’s RK628D video bridging chip, with its highly integrated “24-in-1” design, has become a core component in popular applications such as multi-screen commercial displays, smart projectors, wireless screen mirroring, and video capture cards. As a professional electronic component distributor, Shenzhen Mingjiada Electronics now offers genuine RK628D chips in stock, helping customers rapidly complete product iterations and move into mass production.

RK628D Product Overview

The RK628D is a highly integrated video interface conversion chip launched by Rockchip. It supports combination conversion between various video input and output interfaces. With a built-in MCU and scaler, it can operate independently without relying on a host SoC, greatly simplifying hardware design complexity.

Designed specifically to process high-resolution video signals, this chip supports input and output conversion up to 4K at 60 fps, perfectly meeting current mainstream high-definition display requirements.

Key Specifications

The following are the core technical specifications of the RK628D, compiled based on Rockchip’s official documentation and industry-standard specifications:

Package Type: WBBGA-144 (8mm x 8mm)

Operating Temperature: -40°C to +125°C (meets industrial-grade and automotive-grade temperature standards)

Operating Voltage: 3.3V / 1.8V

Supported Input Interfaces: HDMI (HDMI 2.0-compatible), Parallel RGB, BT.1120

Supported Output Interfaces: HDMI, GVI (General Video Interface), Dual/Single MIPI_DSI, Dual/Single LVDS, MIPI_CSI, RGB, BT.1120

Data Rate: Supports up to 3.75 Gbps (GVI interface)

Key Features and Advantages

1. “24-in-1” Extremely Comprehensive Interface Combination

The RK628D supports 3 input interfaces and 9 output interfaces, allowing for any combination to achieve 24 video transmission conversion paths. This feature makes it a “universal translator” between various display devices, effectively solving the problem of insufficient or mismatched interfaces on the host SoC.

2. Support for Dual-Screen Output at the Same Resolution

The chip supports simultaneous output through two interfaces at the same resolution, making it ideal for commercial display scenarios—such as digital signage and point-of-sale systems—that require dual screens to display the same or different content.

3. Built-in MCU and Standalone Operation Capability

Unlike traditional pure bridging chips, the RK628D features a built-in MCU that enables standalone operation. This means that when expanding display interfaces, there is no need to add an additional host controller chip, which not only reduces BOM costs but also shortens the development cycle.

4. Powerful Video Processing Capabilities

With a built-in high-performance scaler, it supports scaling from 1/4 to 4 times the input resolution and can handle color space conversion, ensuring clear and smooth images when switching between screens of different resolutions.

Main Application Scenarios

The RK628D covers six major application scenarios ranging from consumer electronics to industrial and commercial displays:

Multi-screen commercial display devices (digital signage/point-of-sale terminals): Converts HDMI input to MIPI/LVDS output, assisting the main controller in achieving dual-screen display expansion.

4K large-screen conversion (TVs/widescreen displays): Converts 4K HDMI signals to GVI signals, ensuring compatibility with next-generation commercial display interfaces.

Smart Projectors: Converts HDMI signals to MIPI_CSI output for connecting to projector engine modules, supporting 4K resolution input.

Wireless Screen Mirroring Devices (Dongles): After receiving and decoding wireless signals, it drives the display via HDMI IN to LVDS/MIPI to enable screen mirroring.

Video Capture Cards and Video Transmission Devices: Used for live streaming and drone gimbal video transmission, these devices convert HDMI video sources to MIPI_CSI output for processing by the main control SoC, supporting up to 4K resolution.

Smart Displays and Interactive Whiteboards: Functioning as video input front-ends, these devices connect external HDMI signals to the main control SoC to enable picture-in-picture or annotation features.

Why Choose Mingjiada Electronics?

As a globally renowned distributor of electronic components with over 20 years of industry experience, Shenzhen Mingjiada Electronics offers the following guarantees:

Genuine Products: We distribute products from over 500 well-known global brands; all materials come directly from original manufacturers and authorized channels to ensure quality.

In-Stock Inventory: We maintain ample inventory of the RK628D and related chips, supporting rapid sample delivery and bulk shipments.

Contact Shenzhen Mingjiada Electronics Co., Ltd.

Phone: 86-755-83294757 / 13410018555

Email: sales@hkmjd.com

Address: Rooms 1239–1241, New Asia Guoli Building, Zhenzhong Road, Futian District, Shenzhen, Guangdong Province