When you’re building a DC-to-DC converter, off-the-shelf magnetics feel like an easy choice. You pick a part number from a catalog, slap it on the board, and move on.
But then reality hits.
Your circuit runs too hot. You can’t shrink the enclosure without melting adjacent components. Or worse, random electromagnetic noise starts throwing off your control signals.
That’s where off-the-shelf components hit a wall. When you need to squeeze maximum performance out of a tight footprint, standard parts just won’t cut it. Custom-engineered magnetics change the game entirely.
Here are the 9 big reasons why going custom makes all the difference in modern DC-to-DC designs.
Benefit #1: Targeted Power Density Optimization
Every millimeter matters on a high-density circuit board. Off-the-shelf inductors and transformers come in fixed, boxy shapes that require you to adapt your layout to accommodate them. Custom magnetics change that dynamic. By selecting specific core geometries, such as low-profile planar or compact PQ cores, you can achieve the exact energy storage you need without wasting any vertical or horizontal space on the board.
Benefit #2: Drastic Suppression of Core and Winding Losses
Standard catalog components are suitable for conventional operating frequencies. However, if your converter operates at a unique high-frequency switching point, using standard core materials may result in energy loss as heat. Custom designs that use the right core materials and special wire types, like Litz wire, can make your system work better at specific frequencies. This leads to less AC resistance and minimal energy loss, allowing your converter to run cooler and more efficiently.
Benefit #3: Superior Thermal Management Built Right In
Dealing with high temperatures is a key issue in power electronics, and a new solution has to be created. Usually, when traditional magnetic components get too hot, we need big heat sinks or cooling fans to reduce the heat. In contrast, specially designed magnetic components consider heat management from the start. They use materials that improve heat flow and have small airflow channels to help move heat away from the core to cooler areas nearby. This method greatly enhances the stability and performance of the devices they are used in.
Benefit #4: Unmatched Control Over Parasitics and EMI
High levels of flux leakage and unwanted capacitance can turn a well-developed converter into an unintentional radio transmitter. Numerous typical solutions fail to provide adequate shielding or suitable winding arrangements.
Custom magnetic components are mainly used for:
- better placement of Faraday shields;
- precise adjustment of winding positions;
- and reduced stray electromagnetic fields.
This results in improved switching waveforms and enhances performance in electromagnetic compatibility tests.
Benefit #5: Precise Inductance and Saturation Margins
When using standard components, there are often trade-offs to consider. That said, if you need a specific inductance value, you might find that the only available option capable of handling your peak current is much larger than necessary. Thus, opting for a custom design gives you the flexibility to modify the magnetic air gap precisely. This enables you to create a perfect saturation curve, empowering the component to handle high surge currents with minimal inductance drop.
Benefit #6: Extreme Mechanical Durability for Harsh Environments
If your power system functions in aerospace, defense, or underwater environments, you might discover that conventional magnetics do not provide sufficient reliability. Vibrations can cause fractures in fragile cores, and fluctuations in temperature can harm typical lead connections. This is why investing in custom-designed components is crucial for maintaining performance under extreme conditions.
Custom-designed components are built specifically to withstand harsh conditions, equipped with strong mounts, reinforced posts, and military-grade encapsulation to ensure that your converter remains stable, regardless of the environmental challenges faced.
Benefit #7: Extended Lifespan and Long-Term System Reliability
You want to improve performance but also contribute to a longer lifespan and greater reliability of the system? To enhance the effectiveness of a DC-to-DC converter, use high-quality components and insulation, operate within the proper temperature limits, and conduct thorough testing of all wire connections to prevent heat and high voltage issues.
By considering these precautions, you can help ensure your power subassembly operates efficiently for years to come, minimizing the risk of premature failure.
Benefit #8: Seamless Voltage Ratio Customization and Multi-Output Capabilities
If you need three separate secondary rails to work with a main feedback loop, it can be difficult to find a standard transformer that provides the right voltage ratios without needing complex secondary regulators. Custom transformers let you create multiple specific secondary windings in one compact core. This method greatly reduces the number of components you need and simplifies your power distribution system.
Benefit #9: Reduced Total System Cost over the Product Lifecycle
Custom components may seem expensive at first. However, their long-term benefits are significant. They can reduce the need for extra cooling equipment, cut down the number of EMI filters required, save board space, and lower the chance of failures. This leads to a decrease in the overall system cost. Custom magnetics do more than just improve your specifications; they also help make your entire bill of materials more efficient for sustainable production in the future.
Pre-assembled catalog components are suitable for prompt testing, but custom magnetics are better for high-performance DC-to-DC converters. They increase power density, improve efficiency, and ensure reliability, enhancing performance as you scale up.
Custom magnetics play a pivotal role offering benefits that go beyond standard components.
Their ability to improve efficiency, reliability, and adaptability makes them invaluable across various industries. By minimizing energy losses, optimizing power density, and managing thermal conditions, custom magnetics ensure that converters perform at their best. Their precision in voltage regulation and reduced electromagnetic interference further enhance system stability.
Additionally, their scalability and durability address specific application needs, proving essential for high-performance environments. Incorporating custom magnetics not only meets the exact requirements of complex systems but also drives long-term success and innovation, making them a cornerstone of advanced power conversion solutions.
About Velatron Technologies
Velatron Technologies is a leading designer and manufacturer of high-reliability and mission-critical magnetics such as custom transformers, inductors, windings and related assemblies, serving various industries for more than 80 years. Located in Kitchener, Ontario, Canada, the company focuses on four main capabilities including product design, reverse engineering, build to print and wound component repair. They are AS9100D, ISO9001 and Controlled Goods (ITAR equivalent) certified, and were formerly known as S.G. Smallwood, Inc. For more info, see www.velatron.com.
