iUniker GaN PD 27W 5.1V 5A 27W PD Power Supply USB-C for Raspberry Pi 5 vs 5V 4A Power Supply Adapter

Design and Compatibility

The iUniker GaN PD 27W and the 5V 4A Power Supply Adapter serve somewhat different device compatibility needs, with the iUniker product clearly optimised for the Raspberry Pi 5. The iUniker GaN PD 27W is specifically designed for the Raspberry Pi 5 4GB/8GB models, supporting the device’s USB-C power requirements with an output of 5.1V and 5A, along with several other voltage options. In contrast, the 5V 4A Power Supply Adapter from LeTaoXing is a more general-purpose power supply, providing a 5V DC output at a maximum of 4A, suitable for a wide range of 5V devices drawing less than 20W. This includes LED pixel strips, Jetson Nano, Odroid models, routers, and IP cameras.

While the iUniker’s compatibility is specialised and precise, the LeTaoXing’s broader compatibility offers flexibility for users with multiple device types. The slightly higher current rating of the iUniker (5A versus 4A) makes it better suited for devices demanding higher amperage, such as the Raspberry Pi 5. However, for general 5V 4A needs, the LeTaoXing adapter remains a solid choice.

Power Output and Performance

The iUniker GaN PD 27W stands out with its multiple output voltages and higher maximum current output compared to the 5V 4A Power Supply Adapter. The iUniker provides 5.1V at 5A, along with additional outputs at 9V/3A, 12V/2.25A, and 15V/1.8A, granting it greater versatility for devices requiring variable voltages. The maximum power output peaks at 27W, matching its name, which is suitable for devices that demand rapid and stable power delivery.

Conversely, the LeTaoXing adapter delivers a fixed 5V at 4A, which totals 20W maximum power. While this is adequate for many low-power devices, it does not match the iUniker’s peak wattage or its ability to supply higher voltages. This makes the iUniker a more powerful and flexible option for users needing higher wattage or multi-voltage capabilities.

Technology and Efficiency

The iUniker GaN PD 27W benefits from the use of Gallium Nitride (GaN) technology, which allows for a smaller form factor without compromising power delivery or thermal performance. GaN technology is known for operating at lower temperatures and greater efficiency compared to traditional silicon-based adapters. This suggests that the iUniker unit will maintain stable performance with less heat generation, which is an advantage for prolonged use or in warmer environments.

The LeTaoXing 5V 4A Power Supply Adapter does not specify any advanced semiconductor technology like GaN, implying it uses more conventional power supply design. This may result in a larger physical size and potentially higher heat output during operation, although specific thermal performance details are not provided. The efficiency difference could influence user preference depending on the operating environment and device usage patterns.

Safety Features

Both power supplies include multiple safety protections to ensure reliable and secure operation. The iUniker GaN PD 27W boasts over-voltage, over-current, and short circuit protection, safeguarding connected devices from electrical faults. These protections are critical for sensitive electronics like the Raspberry Pi 5, which require steady and safe power delivery.

Similarly, the LeTaoXing 5V 4A adapter offers a comprehensive safety suite, including over-voltage, over-current, over-temperature, and short circuit protection. Furthermore, it has passed FCC, CE, and other safety certifications, which provide additional assurance regarding regulatory compliance and user safety. Both products prioritise device protection, but the LeTaoXing’s certification credentials may appeal to users seeking verified compliance.

Physical Features and Connectivity

The iUniker GaN PD 27W comes with a USB-C connector and a relatively short 120mm 18AWG cable, designed specifically to fit the Raspberry Pi 5’s power input. Its input voltage range of 100–240V AC and frequency of 50/60Hz make it suitable for use in a variety of regions without modification. The UK plug is included in the package, simplifying setup for users in the UK.

On the other hand, the LeTaoXing adapter uses a 5.5mm x 2.5mm output adapter jack with a positive inner polarity, providing compatibility with devices requiring this common barrel plug size. The power cord length is 3.9ft (approximately 1.2 metres), offering more flexibility in placement compared to iUniker’s shorter cable. The input voltage and frequency range are the same as iUniker’s, supporting international use, but the fixed plug type means it is less suitable for USB-C powered devices like the Raspberry Pi 5.

Price and Value

The iUniker GaN PD 27W is priced at £13.79, making it the more affordable option between the two, despite its advanced GaN technology and higher power output. This competitive pricing is notable given its specialised design and multiple voltage outputs.

The LeTaoXing 5V 4A Power Supply Adapter is priced at £14.98, slightly higher than the iUniker. While it offers broad compatibility and safety certifications, it lacks the advanced features and power flexibility of the iUniker. For users seeking a general 5V 4A supply, the marginally higher price might be justified by the wider device compatibility, but from a pure cost-to-performance perspective, the iUniker offers better value.

Use Case Suitability

If your primary need is to power a Raspberry Pi 5 reliably and efficiently, the iUniker GaN PD 27W is the clear choice. It is designed specifically for this device, supports the required USB-C power delivery standard, and offers a higher current output of 5A at 5.1V. Its GaN technology also means it is likely to run cooler and be more efficient in continuous use, which is important for single-board computers often used in long-running projects.

For users with a range of 5V devices that draw less than 4A and require a 5.5mm barrel plug, the LeTaoXing adapter is more appropriate. Its broad compatibility with LED strips, Jetson Nano, Odroid, and networking devices makes it a flexible solution for various electronics, albeit with a lower power capacity and no USB-C output.

Which should you buy?

Choosing between the iUniker GaN PD 27W and the LeTaoXing 5V 4A Power Supply Adapter depends primarily on your device requirements and desired features. For Raspberry Pi 5 owners or those needing a compact, efficient, and multi-voltage USB-C power supply, the iUniker at £13.79 offers superior power output, modern GaN technology, and a price advantage. Its 5.1V/5A output and USB-C connector make it the best fit for the latest single-board computers requiring reliable PD charging.

If you require a universal 5V 4A adapter with a barrel plug for a variety of devices, including LED strips and other electronics, the LeTaoXing adapter priced at £14.98 provides flexibility and well-rounded safety certifications. However, it lacks the advanced GaN technology and higher amperage output of the iUniker unit.

In summary, the iUniker GaN PD 27W is the better buy for specialised Raspberry Pi 5 use and higher power demands, while the LeTaoXing 5V 4A adapter suits broader 5V device compatibility at a slightly higher price.