Encapsulated Ac-Dc Modules



Introduction

Welcome to the CUI Product Spotlight on encapsulated ac-dc power supplies. Learn about the benefits of an encapsulated power supply design, target applications and CUI's encapsulated ac-dc module family. Our designs are optimized to provide a very compact solution at each available power level.

Objectives

  • Explain the benefits of an encapsulated power supply design.
  • Summarize the range of products in CUI's encapsulated ac-dc module family.
  • Highlight the target applications that these encapsulated power modules address.

Rugged Design

CUI's PSK, VSK, and PBK series are potted and, in the case of the PSK and VSK series, packaged in an encapsulated case, providing added protection in environments that may experience:

  • Moisture
  • Dust & Dirt
  • High Shock & Vibration

Product Benefits

CUI's encapsulated family of ac-dc power modules is available in compact board mount or chassis mount configurations. To address the rising emphasis on no-load, or "vampire" power draw in electronic equipment, the modules are designed to consume as little as 100 mW under no-load conditions. For applications that require a wide temperature range, including industrial and outdoor equipment, the PSK and VSK series offer an operating temperature range of -25 to 70 degrees Celsius, while the PBK series offers an even wider range of -40 to 85 degrees Celsius. Additional features include a standard isolation voltage up to 4000 Vac, very low ripple & noise, and UL/cUL and CE certifications for all models.

Highlights

  • Board mount and chassis mount packages
  • No-load power consumption as low as 100 mW
  • Operating temperature range up to -40~85°C
  • Up to 4 kVac isolation voltage
  • Low ripple & noise
  • UL/cUL and CE certifications

Convenient Installation

The VSK-T series' chassis mount packaging allows users to install the units in applications where a dedicated circuit board for the power system is not feasible or is cost prohibitive. Users are able to secure the VSK-T series to a chassis and connect the input and output cables via the module's terminal block connectors.

Protections



  • Short circuit protection
  • Over current protection
  • Over voltage protection

All models in the PSK series come with built-in over current, over voltage, and short circuit protections, while a number of the VSK series come with built-in short circuit and over voltage protections. In the event of a fault in any of these areas, the converter's output will shut down, recovering automatically when the fault is removed. The PBK series comes standard with over current and short circuit protections.

Applications

The PSK, VSK, and PBK series are perfect for a wide range of applications requiring on-board ac to dc power conversion.

  • Consumer electronics
  • Communications
  • Industrial control
  • Smart Metering
  • Lighting

Addressing Application Challenges


Some applications in North America, including equipment in the rapidly expanding LED lighting, sensing and smart building markets, run off of a 277 ac input voltage, requiring a specialized ac-dc power supply design. To address these applications, the 1 watt and 2 watt versions of the VSK family feature an extended input range of 85 to 305 Vac, making them well suited for use in not only general ITE, consumer, and industrial equipment, but in these emerging fields as well.

277 Vac Mains

  • Applications running off a 277 Vac input in North America require specialized ac-dc power supplies with an extended input range. These include:
    • Lighting
    • Sensing
    • Smart Building
  • The VSK-S1 and VSK-S2 have been designed with an 85~305 Vac input range to address these rapidly growing markets.

Available Products

PSK and VSK Board Mount Families

The PSK and VSK board mount families are available in 8 separate series ranging from 1 watt up to 25 watts. All models feature a universal input and a range of available output voltages from 3.3 Vdc to 48 Vdc depending on the series.

series power (w) input voltage (Vac) output voltages (Vdc) size (in) safety standard
VSK-S1 1 85~305 3.3, 5, 9, 12, 15, 24 1.33 X 0.87 X 0.71 60950-1 (ITE)
VSK-S2 2 85~305 3.3, 5, 9, 12, 15, 24 1.33 X 0.87 X 0.71 60950-1 (ITE)
VSK-S3 3 85~264 3.3, 5, 9, 12, 15, 24 1.46 X 0.91 X 0.59 60950-1 (ITE)
PSK-6B 6 85~264 5, 9, 12, 15, 24 2.0 x 1.0 x 0.659 60950-1 (ITE)
PSK-10B 10 85~264 5, 9, 12, 15, 24 2.0 x 1.0 x 0.809 60950-1 (ITE)
PSK-15B 15 85~264 5, 9, 12, 15, 24, 48 2.44 x 1.77 x 0.909 60950-1 (ITE)
PSK-20B 20 85~264 5, 9, 12, 15, 24, 48 2.44 x 1.77 x 0.909 60950-1 (ITE)
VSK-S25 25 85~264 5, 9, 12, 15, 24, 48 2.75 x 1.89 x 0.92 60950-1 (ITE)

PBK Board Mount Family

The PBK board mount series is housed in an ultra-compact SIP package. The family is available in 6 series ranging from 1 watt to 5 watts in vertical and horizontal orientations. All models feature a universal input and a range of available output voltages from 3.3 Vdc to 24 Vdc depending on the series.

series power (w) input voltage (Vac) output voltages (Vdc) size (in) safety standard
PBK-1 1 85~264 5, 9, 12, 15, 24 1.38 X 0.43 X 0.98 60950-1 (ITE)
PBK-1-B 1 85~264 5, 9, 12, 15, 24 1.38 X 0.98 X 0.43 60950-1 (ITE)
PBK-3 3 85~264 3.3, 5, 9, 12, 15, 24 1.38 X 0.43 X 0.98 60950-1 (ITE)
PBK-3-B 3 85~264 3.3, 5, 9, 12, 15, 24 1.38 X 0.98 X 0.43 60950-1 (ITE)
PBK-5 5 85~264 3.3, 5, 9, 12, 15, 24 1.65 x 0.43 x 0.94 60950-1 (ITE)
PBK-5-B 5 85~264 3.3, 5, 9, 12, 15, 24 1.65 x 0.94 x 0.43 60950-1 (ITE)

VSK Chassis Mount Family

The VSK series is also available in chassis mount configurations for applications where designing a dedicated circuit board that includes the power rail may not be feasible. The VSK-T series is offered in configurations ranging from 5 watts to 25 watts.

series power (w) input voltage (Vac) output voltages (Vdc) size (in) safety standard
VSK-S5-T 5 85~264 3.3, 5, 9, 12, 15, 24 2.99 X 1.24 X 0.94 60950-1 (ITE)
VSK-S10-T 10 85~264 3.3, 5, 9, 12, 15, 24 2.99 X 1.24 X 1.12 60950-1 (ITE)
VSK-S15-T 15 85~264 3.3, 5, 9, 12, 15, 24, 48 3.78 X 2.13 X 1.22 60950-1 (ITE)
VSK-S20-T 20 85~264 3.3, 5, 9, 12, 15, 24 3.78 X 2.13 X 1.26 60950-1 (ITE)
VSK-S25-T 25 85~264 5, 9, 12, 15, 24, 48 3.78 X 2.13 X 1.26 60950-1 (ITE)

Summary

CUI's broad line of encapsulated ac-dc power modules are available in board mount and chassis mount configurations. Their high efficiency, improved no-load power consumption and wide operating temperature range makes them the ideal solution for applications requiring on-board power conversion, where space is limited. Read more on our website.


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