9. EMC Considerations

Design Guide & Applications Manual

For VI-200 and VI-J00 Family DC-DC Converters and Configurable Power Supplies

CONDUCTED NOISE

Conducted noise is the AC current flowing between the source voltage and the power supply. It includes both common-mode and differential-mode noise. Vicor zero- current-switching converters are 20 – 40 dB lower in conducted noise than a traditional board-mounted PWM converter; however, if a specific EMC specification such as FCC or VDE must be met, additional filtering may be required.

Since the noise generated is ten to a hundred times lower than fixed frequency converters, an existing filter should provide equal or better performance when the conditions in the Module Do’s and Don’ts section are followed. (Section 3)

In the event the system does not contain an existing filter, the following will provide valuable information relative to the attainment of system conducted noise objectives.

System requirements, such as Tempest (military) or UL544 / EN60601 (medical), require a somewhat different approach. Medical requirements vary as a function of the application and country — please contact Vicor Applications Engineering for additional details.

Common-Mode Noise with No Additional Filtering. Common mode conducted noise current is the unidirectional (in phase) component in both the +IN and –IN pins to the module. This current circulates from the converter via the power input leads to the DC source and returns to the converter via the grounded baseplate or output lead connections. This represents a potentially large loop cross-sectional area which, if not effectively controlled, can generate magnetic fields. Common-mode noise is a function of the dv/dt across the main switch in the converter and the effective input to baseplate and input to output capacitance of the converter.

The most effective means to reduce common-mode current is to bypass both input leads to the baseplate with Y-capacitors (C2), keeping the leads short to reduce parasitic inductance. Additionally, a common-mode choke (L1) is usually required to meet FCC/ VDE A or B. (Figure 9–2)

Typical Vicor Module

48 V Input, 5 V Output (VI-230-CV)

C2

 

 

C3

 

 

 

 

+IN

+OUT

 

 

 

Conditions:

 

GATE

+S

C1

= 100 μF

 

Light Load = 3 A

C1

IN

TRIM

C2

= 4,700 pF

Nominal Line = 48 V

Nominal Load = 15 A

GATE

 

–S

C3

= 0.01 μF

 

Full Load = 30 A

 

OUT

 

 

–IN

–OUT

 

 

 

 

C2

 

 

C3

 

 

 

 

 

Conducted Noise vs. Load

 

 

3 Amp Load

 

 

15 Amp Load

 

 

30 Amp Load

Figure 9–1— Conducted input noise, no additional filtering

vicorpower.com

800-735-6200

Applications Engineering 1-800-927-9474

Rev. 2.1

Page 18 of 88

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EMC VI-J00, VI-200 specifications Typical Vicor Module Input, 5 V Output VI-230-CV, Conducted Noise vs. Load
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VI-J00, VI-200 specifications

EMC VI-J00 and VI-200 are advanced storage solutions designed to meet the diverse needs of modern enterprises. As part of the EMC product line, these models offer features intended to enhance data management, security, and scalability, making them suitable for various applications, from small businesses to large-scale data centers.

The EMC VI-J00 is renowned for its compact design and energy efficiency. It is particularly well-suited for edge computing applications, where space is limited and power consumption is a critical concern. This model leverages cutting-edge data reduction technologies such as deduplication and compression, allowing organizations to maximize storage efficiency while minimizing costs. The VI-J00 also supports multiple access protocols including NAS and block, enabling seamless integration into existing IT environments.

In contrast, the EMC VI-200 offers a more robust and scalable solution for larger enterprises requiring extensive data throughput and storage capacity. It features high-performance storage capabilities with support for NVMe technology, which significantly enhances data access speeds. The VI-200 is built with a modular architecture, allowing organizations to scale their systems as needed, adding capacity or performance without disrupting ongoing operations.

Both models incorporate advanced data protection technologies, including snapshot capabilities and remote replication, ensuring that data is secure and recoverable in the event of a failure. Additionally, they support advanced analytics and management tools that provide real-time insights into storage performance and utilization, leading to improved resource allocation.

Interoperability is another key characteristic of both the VI-J00 and VI-200. These systems are designed to work seamlessly with a wide range of applications and platforms, providing flexibility and choice for IT administrators. Their compatibility with various virtualization platforms further enhances their appeal, allowing businesses to create dynamic, efficient storage environments.

In summary, EMC VI-J00 and VI-200 are powerful storage solutions tailored to meet the demands of today's data-centric organizations. With features focused on efficiency, scalability, and data protection, they stand out as reliable options for businesses looking to optimize their data storage strategies while leveraging the latest technologies.
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