DC-DC constant voltage converters can operate in strong magnetic field environments with special considerations. It is important to use magnetic shielding materials to protect sensitive components, choose inductors with low magnetic permeability and high-quality ceramic capacitors, and optimize physical orientation to minimize magnetic interference. In addition, robust PCB design practices, such as using short traces and ground planes along with adding filtering components, can help reduce noise. Conducting thorough environmental testing ensures reliability, and choosing converters designed for harsh conditions per manufacturer specifications is crucial. By addressing these factors, DC-DC converters can operate reliably in strong magnetic fields.

Short-circuiting the GND terminal of a DC-DC module to remove isolation is strongly discouraged for several reasons. DC-DC converters are typically isolated to prevent ground loops and ensure safety. Bypassing this isolation by short-circuiting the GND terminal can result in safety hazards, electric shocks, and device damage. It may also violate safety regulations and certifications. Furthermore, short-circuiting the GND terminal can introduce noise, affect signal integrity, and compromise converter and system performance. It's advisable to use DC-DC converters designed for non-isolated applications instead of modifying isolated converters if isolation isn't required.

When selecting a DC-DC constant voltage converter, key features to consider include the input and output voltage ranges, efficiency, power output, and thermal performance. Ensure the converter supports the required input voltage range and provides a stable output voltage suited to your application. High efficiency minimizes energy loss and reduces heat generation, which is crucial for maintaining performance and reliability. Consider the maximum power output to match your load requirements, and check for features like overcurrent, overvoltage, and thermal protection to safeguard your devices. Additionally, evaluate the converter's size, form factor, and ease of integration into your existing system.