Ugreen UG- 30843 USB Type C to HDMI + VGA Converter (White)

UGREEN UG-30843 USB-C to HDMI + VGA Converter

The UGREEN UG-30843 serves as a dual-output display adapter that enables USB-C equipped devices to connect simultaneously to HDMI and VGA displays. This white-finished converter addresses legacy and modern display connectivity requirements through a single compact adapter.

Dual Display Output Architecture

The UG-30843 incorporates independent HDMI and VGA output ports, allowing users to connect two separate displays concurrently. However, both outputs mirror the same video signal rather than providing extended desktop functionality. Consequently, this adapter suits presentation environments where identical content must appear on multiple screens simultaneously.

The HDMI port supports resolutions up to 4K at 30Hz (3840 × 2160 pixels), providing compatibility with modern ultra-high-definition displays. Meanwhile, the VGA port delivers maximum resolution of 1920 × 1080 pixels at 60Hz, which accommodates most legacy projectors and monitors found in corporate and educational settings.

USB-C Video Signal Processing

This converter utilizes the DisplayPort Alternate Mode protocol available through USB Type-C connections. Therefore, the host device must support video output through its USB-C port—not all USB-C ports include this capability. Devices equipped with Thunderbolt 3, Thunderbolt 4, or USB-C with DP Alt Mode function properly with the UG-30843.

The adapter draws power directly from the USB-C port, eliminating the need for external power adapters. This bus-powered design ensures portability and reduces cable clutter during mobile presentations.

HDMI Output Specifications

The HDMI interface on the UGREEN UG-30843 complies with HDMI 1.4 specifications. This standard supports several key features:

• 4K resolution at 30Hz for ultra-high-definition displays
• 1080p resolution at 60Hz for full HD monitors
• Audio passthrough capabilities for HDMI displays with integrated speakers
• HDCP 1.4 content protection compliance

Moreover, the HDMI output automatically detects connected display capabilities through EDID (Extended Display Identification Data). As a result, the adapter negotiates the optimal resolution and refresh rate supported by both the source device and destination display.

VGA Output Specifications

The VGA port provides analog video output through a standard 15-pin D-sub connector. While VGA represents older display technology, it remains prevalent in numerous professional environments. The UG-30843’s VGA output delivers:

• Maximum resolution of 1920 × 1080 pixels at 60Hz
• Support for standard resolutions including 1680 × 1050, 1600 × 900, 1440 × 900, and 1280 × 1024
• Compatibility with legacy projectors commonly used in conference rooms and classrooms

It’s important to note that VGA carries only video signals. Therefore, audio transmission requires separate connections when using VGA displays.

Digital-to-Analog Conversion Technology

The UGREEN UG-30843 integrates a dedicated DAC (Digital-to-Analog Converter) chip to transform digital USB-C video signals into analog VGA output. This conversion process maintains signal integrity across the transformation, though some minor quality differences may appear compared to native digital connections.

The converter chip also handles signal scaling and refresh rate adjustments automatically. Consequently, users experience plug-and-play functionality without manual configuration in most scenarios.

Physical Design and Construction

The adapter features a compact white housing measuring approximately 55mm × 40mm × 15mm. This minimal footprint makes the UG-30843 suitable for travel and temporary installations. The white finish provides a clean aesthetic that complements modern laptop designs, particularly MacBook and Dell XPS series devices.

A short integrated USB-C cable (approximately 15cm) connects to the host device. This captive cable design reduces the risk of losing separate adapter cables. Additionally, the cable includes strain relief at the USB-C connector to prevent damage from repeated insertion and removal.

Specifications

• Input Connection: USB Type-C male (DP Alt Mode required)
• HDMI Output: HDMI 1.4 standard, Type A female connector
• VGA Output: 15-pin D-sub female connector (HD-15)
• Integrated Cable Length: Approximately 15 centimeters
• Power Delivery Passthrough: Not supported (adapter only)

Video Resolution Support

• HDMI Maximum Resolution: 3840 × 2160 pixels at 30Hz (4K UHD)
• HDMI 1080p Performance: 1920 × 1080 pixels at 60Hz
• VGA Maximum Resolution: 1920 × 1080 pixels at 60Hz
• VGA Common Resolutions: 1680 × 1050, 1600 × 900, 1440 × 900, 1280 × 1024, 1024 × 768
• Display Mode: Mirror mode only (identical content on both outputs)

Audio Specifications

• HDMI Audio Support: Multi-channel digital audio up to 7.1 surround
• VGA Audio Support: None (video only)
• Audio Formats: PCM, Dolby Digital, DTS passthrough via HDMI
• Sample Rates: Up to 192 kHz via HDMI output

Protocol and Compliance

• Video Protocol: DisplayPort Alternate Mode over USB-C
• HDMI Standard: HDMI 1.4 compliant
• HDCP Support: HDCP 1.4 content protection
• EDID Management: Automatic display detection and configuration
• Thunderbolt Compatibility: Thunderbolt 3 and Thunderbolt 4 ports supported

Physical Construction

• Housing Material: ABS plastic
• Color Finish: White
• Dimensions: Approximately 55mm × 40mm × 15mm (excluding cable)
• Weight: Approximately 45 grams
• Cable Type: Integrated USB-C male connector with strain relief
• Operating Temperature: 0°C to 45°C
• Storage Temperature: -10°C to 60°C

Device Compatibility

• MacBook Models: MacBook Pro (2016+), MacBook Air (2018+), MacBook (2015-2019)
• Windows Laptops: Dell XPS, HP Spectre/EliteBook, Lenovo ThinkPad, Microsoft Surface with USB-C
• Tablets: iPad Pro (USB-C models), Samsung Galaxy Tab S series
• Smartphones: Select Android devices with USB-C video output support
• Chromebooks: Models with USB-C video support

• Power Specifications

  • Power Source: USB bus-powered
  • Power Consumption: Approximately 2.5 watts maximum
  • External Power: Not required
  • USB-C Power Delivery: Does not support PD passthrough