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9-Watt DC/DC Converters For Tight Spaces

When designing a circuit board, engineers are always looking for their desired wattage in the smallest possible package. Choosing the smallest possible power supply allows for seamless insertion into any circuit board without taking up too much space.

These units can be hard to come by, since power supplies with higher wattages are typically bigger. Our compact, 9-watt SWB9 series of DC/DC converters can help simplify your board layout.


Technical features. This model comes in a miniature single inline package (SIP) of 0.86” x 0.36” x 0.44” with 89 percent power supply efficiency and a 4:1 ultra wide input range. The SWB9 product line features an input/output isolation up to 1600 Vdc, continuous short circuit protection and output current up to 2000 mA. This series is also RoHS-compliant to EU directive 2011/65/EU and meets all UL60950-1, EN60950-1 and IEC60950-1 safety standards.

SWB9 comes with either a plastic or metal case. The metal case helps the power supply withstand high operating temperature ranges up to 100°C. Also optional is an extra pin that attaches to the case for grounding and shielding.

This DC/DC converter is ideal for a wide range of applications including:

  • Wireless networks
  • Telecommunications
  • Data acquisition
  • Industrial control systems
  • Distributed power architectures
  • Semiconductor equipment

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Video: Polytron Devices High Wattage DC/DC Converters

Learn about our latest high wattage DC/DC converters, the LPA30 and LPB30. Both series feature compact form factor and high efficiency and are well-suited to a variety of electronics applications. Watch this video now.



Compact, High-Wattage Power Supplies

Power supplies come in a wide range of sizes and wattages for convenient use in many applications. And sometimes, you need a power supply that takes up little space but still packs a punch. Since compact, high-wattage units are so easy to integrate, they’ve become a reliable option for applications like wireless networks, tele and data communications, industry control systems, distributed power architectures and semiconductor equipment.

An example of this type of power supply is our LPA30 and LPB30 series of DC-DC converters. Let’s take a closer look.

At a glance. With an extra small low profile package of 1.0” x 1.0” x 0.39”, these 30-watt power supplies offer higher wattages than many similarly-sized units. The only difference is that the LPA30 has a 2:1 wide input voltage range, while the LPB30 has a 4:1 wide input voltage range.

In addition, these units include 92 percent efficiency, no minimum load requirement and a six-sided continuous shield. They also meet all UL60950-1, EN60950-1 and IEC60950-1 safety standards.

Both series are available in either single or dual 24-volt models. Another useful feature is an optional trimming feature that lets you adjust the output voltage. For instance, you can trim the single output 15 and 24 volt models by 20 percent to cover an application requiring 18 or 28 volts.

To add versatility, you can use this power supply with positive or negative logic, which allows you to turn the unit on or off. This feature helps increase its lifespan because the power supply only runs when in use.

Pin-for-pin compatibility. In some applications, engineers need to switch out their power supply for a smaller model. And since their boards are always configured with detailed specifications, the only way to find a model with the same pinout. The pin location is in the same place so customers can fit the unit into the board that they’ve already prefabricated. Since they have the same pin configurations, our LWA15, LWA20, LWB15 and LWB20 power supplies can be interchanged.

Low standby power. These power supplies have low standby power that makes startup time easy and increases the unit’s longevity. With this feature, you don’t have to turn off the unit because it doesn’t use any energy when there’s no load.


Performance Factors and Design Flexibility In Medical Power Supplies

When dealing with medical equipment, strict standards are often put into place to make sure patients and healthcare personnel remain safe. However, beyond these strictly-enforced safety standards, it’s also worth considering how different power supplies stack up when it comes to performance. Here’s a look at some performance factors to help you pick the safest, most reliable power supply possible.

  • Standby power. Since hospitals, healthcare facilities and patients have become more concerned with energy efficiency and conserving resources, the amount of standby power consumed by devices is increasingly more important. Some medical power supplies use standby power as low as 0.15 watts, while similarly-sized devices consume up to 0.48 watts.
  • Environmental factors. Many DC-DC converters are limited to operating between ambient temperatures of -40 and 60°C at full load. Be sure to read specifications carefully, or ask your potential supplier about these engineering values to make the best decision. Aside from temperature constraints, two other factors worth considering are operating altitude and product warranties.
  • Electromagnetic interference (EMI). Medical devices like patient monitors, which operate with low-level signals in hospital settings, are more sensitive to EMI than typical industrial equipment. Whenever possible, look for medical power supplies with built-in EMI filters.
  • Packaging style. While the majority of power converters come with an open frame package, there are some other options available including chassis mount, DIN rail mount and enclosed configurations. Depending on the medical equipment, power supply packaging can play a key role in overall design.
  • Overall performance. When possible, look for power supplies that offer additional design flexibility. For instance, having a wider input range translates to greater flexibility for unforeseen design iterations requiring higher input voltages, or the need to develop several versions of the same basic equipment.