The New Standard in AC-DC Power Conversion:

Efficiency • Reliability • Sustainability

THE FUTURE OF POWER CONVERSION: PUSLIV OSMIUM TECHNOLOGY

  • Processing Only 1/3 of the Throughput Power

  • Adapting Power Factor Correction (PFC)

  • Eliminating Inrush Current

  • Maximising Efficiency Across All Loads

  • Removing Wet Electrolytic Capacitors

  • Enhancing Product Lifetime

  • Outperforming Boost Converters

Pulsiv OSMIUM is an AC-DC power conversion technology developed to solve critical challenges in power supply design.

This patented, scalable architecture optimises efficiency and reliability by:

Pulsiv OSMIUM: The Future of Power Conversion.

WHAT IS PULSIV OSMIUM TECHNOLOGY?

Pulsiv OSMIUM is a new front-end power conversion technology developed to address many of the critical challenges in AC-DC power-supply design.

It is primarily based on the concept of a valley fill circuit to deliver power factor correction (PFC). Unlike the passive valley fill method which uses only diodes and capacitors, Pulsiv OSMIUM technology uses an active switch to achieve an active valley fill approach.

However, it differs from conventional active valley fill methods because it:

  • Regulates the charging current and sets the valley voltage using intelligent algorithms from a dedicated microcontroller.

  • Charges the capacitor through a switch managed by the microcontroller.

  • Discharges the capacitor independently through a diode or switch, regulated by the DC-DC converter.

  • Uses an open-loop strategy in a high-side or low side architecture.

  • Produces a DC output voltage with a high ripple (120V - 320VDC)*

FEATURES AND BENEFITS

Key Features

MAXIMISING EFFICIENCY

True efficiency goes beyond peak numbers. Pulsiv OSMIUM optimizes the relationship between power processing and thermal management to deliver a scalable architecture that remains efficient across all load conditions, regardless of the application.

  • This unique feature enables 66% of the energy to bypass the PFC stage directly into the DC-DC converter at 100% efficiency resulting in:

    • A Flat Efficiency Profile

    • Lower Thermal Management

    • Reduced I²R losses

    • Increased Power Density

    • Smaller Component Size/Values

    • Improved Cost

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EXTENDING RELIABILITY

A reliable system starts with a robust foundation. By optimizing the architecture to handle energy more efficiently, Pulsiv OSMIUM eliminates the primary causes of system degradation, providing a more resilient platform for high-performance electronics.

Key Features

  • In a design using Pulsiv OSMIUM technology, the switch is located inline between the input and bulk capacitor. A Pulsiv OSMIUM microcontroller determines when it’s turned on while also controlling the charging of the capacitor. As a result, when the switch is off (default), the current is zero and therefore, no inrush current exists.

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ENSURING COMPLIANCE

Key Features

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System Design Benefits

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System Design Benefits

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  • Compared to all other designs requiring 400V, the high voltage DC generated by Pulsiv OSMIUM technology is rated at 160 or 200V maximum. This enables the option to replace the wet electrolytic capacitors with a long life dry polymer alternative.

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Exceed today’s standards to secure tomorrow’s designs. Pulsiv OSMIUM provides a scalable, future-proof platform that inherently outperforms global regulatory requirements, simplifying international market entry and protecting your products against evolving legislation.

System Design Benefits

  • Compared to all other designs requiring 400V, the high voltage DC generated by Pulsiv OSMIUM technology is rated at 160 or 200V maximum. This enables the option to replace the wet electrolytic capacitors with a long life dry polymer alternative.

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Pulsiv OSMIUM: The Future of Power Conversion.

INTEGRATING PULSIV OSMIUM TECHNOLOGY

A universal technology with a modular approach to integration.

Pulsiv OSMIUM utilizes the same patented power conversion principles across a range of flexible integration methods, each optimized for specific power levels and system-level requirements.

Pulsiv OSMIUM PRO-LITE

Pulsiv OSMIUM Pro-Lite is

  • Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power applications where size and cost are prioritised over efficiency.

    In this solution:

    • The MOSFET is replaced with a high-voltage transistor up to 400V (or 800V optionally)

    • The inductor, freewheeling diode and blocking diode are no longer required.

    • The size of the electrolytic capacitor can be reduced or replaced with a surface mount dry polymer alternative.

    Specification:

    • Output power: 1W - 45W

    • Input voltage range: Universal, 110VAC only or 230VAC only

    • Output voltage range:

    • Power factor: 0.7

    • Efficiency:

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Pulsiv OSMIUM PRO

Pulsiv OSMIUM Pro is

  • Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power applications where size and cost are prioritised over efficiency.

    In this solution:

    • The MOSFET is replaced with a high-voltage transistor up to 400V (or 800V optionally)

    • The inductor, freewheeling diode and blocking diode are no longer required.

    • The size of the electrolytic capacitor can be reduced or replaced with a surface mount dry polymer alternative.

    Specification:

    • Output power: 1W - 45W

    • Input voltage range: Universal, 110VAC only or 230VAC only

    • Output voltage range:

    • Power factor: 0.7

    • Efficiency:

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Key Feature Description System Design Benefit
33% Partial Power Processing 90 – 265VAC 5 - 20VDC
PSV-RDAD-70USB 90 - 265VAC 5 - 20VDC
PSV-RDAD-75FB 90 – 265VAC 48 VDC
PSV-RDAD-100FB 90 – 265VAC 48 VDC
PSV-RDAD-240USB 90 - 265VAC TBC

Pulsiv OSMIUM LITE

Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power/high volume applications up to 45W, where size and cost are prioritised over efficiency and power factor.

  • Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power applications where size and cost are prioritised over efficiency.

    In this solution:

    • The MOSFET is replaced with a high-voltage transistor up to 400V (or 800V optionally)

    • The inductor, freewheeling diode and blocking diode are no longer required.

    • The size of the electrolytic capacitor can be reduced or replaced with a surface mount dry polymer alternative.

    Specification:

    • Output power: 1W - 45W

    • Input voltage range: Universal, 110VAC only or 230VAC only

    • Output voltage range:

    • Power factor: 0.7

    • Efficiency:

  • Item description

INTEGRATING PULSIV OSMIUM TECHNOLOGY

A universal technology with a modular approach to integration.

Pulsiv OSMIUM utilises the same patented power conversion principles across a range of flexible integration methods, each optimized for specific power levels and system-level requirements.

Pulsiv OSMIUM PRO-LITE

Pulsiv OSMIUM Pro-Lite is

  • Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power applications where size and cost are prioritised over efficiency.

    In this solution:

    • The MOSFET is replaced with a high-voltage transistor up to 400V (or 800V optionally)

    • The inductor, freewheeling diode and blocking diode are no longer required.

    • The size of the electrolytic capacitor can be reduced or replaced with a surface mount dry polymer alternative.

    Specification:

    • Output power: 1W - 45W

    • Input voltage range: Universal, 110VAC only or 230VAC only

    • Output voltage range:

    • Power factor: 0.7

    • Efficiency:

  • Item description

Pulsiv OSMIUM PRO

Pulsiv OSMIUM Pro is

  • Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power applications where size and cost are prioritised over efficiency.

    In this solution:

    • The MOSFET is replaced with a high-voltage transistor up to 400V (or 800V optionally)

    • The inductor, freewheeling diode and blocking diode are no longer required.

    • The size of the electrolytic capacitor can be reduced or replaced with a surface mount dry polymer alternative.

    Specification:

    • Output power: 1W - 45W

    • Input voltage range: Universal, 110VAC only or 230VAC only

    • Output voltage range:

    • Power factor: 0.7

    • Efficiency:

  • Item description
Key Feature Description System Design Benefit
33% Partial Power Processing 90 – 265VAC 5 - 20VDC
PSV-RDAD-70USB 90 - 265VAC 5 - 20VDC
PSV-RDAD-75FB 90 – 265VAC 48 VDC
PSV-RDAD-100FB 90 – 265VAC 48 VDC
PSV-RDAD-240USB 90 - 265VAC TBC

Pulsiv OSMIUM LITE

Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power/high volume applications up to 45W, where size and cost are prioritised over efficiency and power factor.

  • Pulsiv OSMIUM Lite is a constant current transistor based architecture ideally suited for low power applications where size and cost are prioritised over efficiency.

    In this solution:

    • The MOSFET is replaced with a high-voltage transistor up to 400V (or 800V optionally)

    • The inductor, freewheeling diode and blocking diode are no longer required.

    • The size of the electrolytic capacitor can be reduced or replaced with a surface mount dry polymer alternative.

    Specification:

    • Output power: 1W - 45W

    • Input voltage range: Universal, 110VAC only or 230VAC only

    • Output voltage range:

    • Power factor: 0.7

    • Efficiency:

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THE INVENTION THAT
REDEFINES INNOVATION

Pulsiv OSMIUM technology applies intelligence to the Valley Fill method. Whilst similar to a buck converter, it differs by regulating the charging current and valley voltage to charge a storage capacitor combined with a high-side or low side architecture.

As a result, it only needs to process 33% of the total power with the remaining 66% passing directly into the DC-DC stage at 100% efficiency. The charging time is much wider and not sensitive to the load which reduces the harmonic content of the charging current

HOW DO WE COMPARE TO A BOOST PFC?

Pulsiv OSMIUM technology provides significant advantages in the optimisation of Power Factor Correction (PFC) when developing AC-DC power supply designs and is the only suitable alternative to a Boost PFC.

The comparison shown below demonstrates the differences, result, and benefit when comparing the two technologies side-by-side in a 150W AC-DC power supply.

FRONT-END CONFIGURATION:

Boost PFC:

Result:

Benefit:

BULK CAPACITOR VOLTAGE RATING & TYPE:

Series

Increased performance at low loads and a totally flat efficiency profile

By only needing to process 33% of the power, most of the energy bypasses the PFC stage directly into the DC-DC stage. This significantly improves critical aspects of the power supply design including efficiency, thermal management, component sizes, I²R losses, power density, lifetime, reliability, and overall cost.

Must process 100% of the power

PFC VOLTAGE:

Boost PFC:

Benefit:

Voltage: 400V
Type: Wet Aluminium Electrolytic

Pulsiv OSMIUM:

Pulsiv OSMIUM:

Only needs to process 33% of the power

POWER REGULATION:

Boost PFC:

Result:

Benefit:

Result:

Boost PFC:

Benefit:

Result:

~ 400V

Lower voltage step-down ratio to the DC-DC stage

Pulsiv OSMIUM technology not only delivers a lower PFC voltage, but a wider range compared to the 400V required in Boost PFC designs. While the lower step-down ratio improves efficiency, the converter will also automatically vary it’s switching frequency which provides significant advantages in complying with EMC regulations.

3W

SIZE AT 2W/cm³:

4.2cm x 4.2cm x 4.2cm = 75cm³

Pulsiv OSMIUM:

Pulsiv OSMIUM:

Pulsiv OSMIUM:

Pulsiv OSMIUM:

Parallel

Eliminated

~ 100V - 325V

1W

Significant improvements in thermal management, size/weight, reliability, and energy waste

Pulsiv OSMIUM technology reduces power losses in the PF stage and subsequently lowers heat generation by 67%. This directly improves the overall efficiency, reliability, and expected life of the power supply. It further reduces size/weight, increases power density, and helps meet regulatory standards (E.g. DOE Level VI, 80 PLUS Titanium, Energy Star etc) while also lowering energy waste.

2.9cm x 2.9cm x 2.9cm = 25cm³

200% increase in power density and 67% reduction in overall size of the power supply

Pulsiv OSMIUM technology enables more compact power supplies to be developed - often a focus in the design of next generation products. A reduced volume further helps lower overall weight, and reduce manufacturing costs which can positively impact the final product price and/or profitability.

Boost PFC:

Benefit:

Pulsiv OSMIUM:

Voltage: 160V or 200V Selectable
Type: Wet Aluminium Electrolytic or Dry Polymer

Optional use of Dry Polymer capacitors to extend lifetime to 25 years

Due to the lower PFC voltage that is generated by Pulsiv OSMIUM technology, the bulk capacitor only needs to be rated at 160V or 200V - reducing size, weight, and cost compared to the 400V required in a Boost PFC design. This enables the optional use of Dry Polymer capacitors which eliminates any potential risk of traditional wet electrolytics drying out and extends lifetime to 25 years.

67% of the power passes directly into the DC-DC converter at 100% efficiency

By only needing to process 33% of the power, most of the energy bypasses the PFC stage directly into the DC-DC converter. This significantly improves critical aspects of the power supply design including efficiency, thermal management, component sizes, I²R losses, power density, lifetime, reliability, and overall cost.

INRUSH CURRENT:

Boost PFC:

Result:

Benefit:

Must be managed / reduced

No additional components or complex circuitry is required to manage the inrush current

In a design using Pulsiv OSMIUM technology, the switch is located inline between the input and bulk capacitor. A Pulsiv OSMIUM microcontroller determines when it’s turned on while also controlling the charging of the capacitor. As a result, when the switch is off (default), the current is zero and therefore, no inrush current exists.

POWER LOSS AT 98% EFFICIENCY:

Result:

Boost PFC:

Benefit:

Result:

The global electronics industry has been longing for a breakthrough technology that can address many of the critical design challenges associated with developing a power supply. Any new technology that promises to revolutionise how we think about power electronics will undoubtedly raise questions, suspicion, or even criticism.

As such, we’ve answered many of the questions raised by engineers from around the world to provide as much information as possible about our innovative, world leading, and patented technology.

ABOUT PULSIV OSMIUM TECHNOLOGY

Discover many of the frequently asked questions, in general, about Pulsiv OSMIUM technology by those who have encountered it for the first time.

ABOUT DEVELOPING A PULSIV OSMIUM FRONT-END DESIGN

Discover many of the frequently asked questions about how to develop a front-end stage of a power supply design based on Pulsiv OSMIUM technology.

Discover many of the frequently asked questions about Pulsiv OSMIUM products including stock availability and where to buy them.

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ABOUT DEVELOPING THE DC-DC STAGE OF A PULSIV OSMIUM FRONT-END DESIGN

Discover many of the frequently asked questions about how to develop the DC-DC stage of a power supply design based on a Pulsiv OSMIUM front-end design.

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ABOUT PULSIV OSMIUM PRODUCTS

MORE QUESTIONS? - NO PROBLEM!

We actively encourage and openly welcome anyone looking to learn more about our technology. We can help via email, phone, website chat, online conference call, or a member of our team can visit your location - just contact us.

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FREQUENTLY ASKED QUESTIONS