Basic Guidelines for EMI Filtering

Basic Guidelines for EMI Filtering

All switching power supplies generate signals that can potentially interfere with other electronic circuits as a result of the switching action. Vicor’s quasi-resonant, zero-current switching topology generates far less conducted and radiated noise than other topologies, both in magnitude and frequency spectrum. EMI filtering can reduce the noise by an additional 40-60 dB.The most effective means to reduce common mode noise current is to bypass both input leads as well as both output leads with “Y” capacitors, keeping the leads short to reduce parasitic inductance. Additionally, a common mode choke is usually required to...

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New Mid-Power 48 Vin Micro Modules

New Mid-Power 48 Vin Micro Modules

Vicor has added six mid-power Micro DC-DC converters to the 48 Vdc input family: a 50 W model at 3.3 Vout and 75 W models at 12, 15, 24, 28, and 48 Vout. The modules – which incorporate Vicor’s patented low-noise zero-current and zero-voltage switching (ZCS/ZVS) – are appropriate for power system applications in distributed power, medical, ATE, communications, defence, and aerospace. With these new models, the 48 Vin Micros family now comprises 16 models with output voltages from 2 to 48 Vdc and power levels from 50 to 150 W. The converters operate...

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New Mid-Power Micro Modules

New Mid-Power Micro Modules

Vicor has added seven mid-power Micro DC-DC converters to the high-density 300 Vdc input family: two 50 W models, one at 3.3 Vout and 5 Vout, and five 75 W models at 12, 15, 24, 28, and 48 Vout. The modules are appropriate for designing off-line power systems for industrial and process control, distributed power, medical, ATE, communications, defense, and aerospace applications. The addition of these modules doubles the size of the high-power density 300 Vin Micro family, which previously consisted of 100 W at 5 Vout, and 150 W at 12, 15, 24,...

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Our Goal: High Performance, On Time, Always

Vicor prides itself on the high performance, small size and wide selection of the products we offer; however, we are also focused on ensuring our products are delivered quickly, on time and to exacting quality standards. Our website now has a Quality Centre, a comprehensive online resource of Vicor quality systems. The visitor can create a custom quality report or take a ‘virtual tour’ of Vicor’s 21,400sq metre factory, showing the key stages in the manufacture of our products. There is a library of documentation, videos, and process charts, downloadable reports in PDF format,...

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New Tram-Trains Using Tyres

New Tram-Trains Using Tyres

This new rubber-tyred vehicle system takes bus and tramway and combines the advantages of the two systems: better stability, a smoother ride for travellers, only one central rail, more flexibility and, with a diesel engine, it can be used on every road. Vicor modules (VI-J00 products) are used in this modern system of transportation. With a wide input voltage range of 18 – 36 Vdc, a high reliability (MTBF), low size and weight, and ease of use, the Vicor modules provided the ideal solution.

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Improving Output Ripple

Improving Output Ripple

Vicor’s DC-DC converter incorporates an output filter that provides ripple/noise levels suitable for most customers. However, in some situations there are much higher requirements for low output noise and quiet supply voltages. These can be achieved by using some additional components such as extra capacitors, LC groups (PI filter) or more complex filters including common mode chokes. Vicor provides a wide range of passive components and active solutions to help our customers to meet their sophisticated design requirements. A good measurement technique is required to get repeatability and to ensure that other stray elements...

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Vicor is Now Shipping RoHS Compliant Products

Customers using Vicor products can decide for themselves the date that they wish to transition to RoHS compliant manufacturing processes. Whilst the European Community has established a date of 1st July 2006 for full RoHS compliance, some customers may wish to transition immediately whilst others in market areas such as Defence and Telecoms, which are generally excluded, may wish to delay transition. For our first generation VI-200 and VI-J modules Vicor has introduced new VE- part numbers that allow customers to specify RoHS compliant product. For our 2nd Generation products, specifying a -G suffix...

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