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From circuitprotection.com
The rapidly evolving consumer electronics market is driving the transition from less expensive, less efficient linear power supplies to the switch mode power supply (SMPS). This shift is accompanied by industry efforts to continuously increase switching frequencies to provide more power in less space. This opens new markets for SMPS manufacturers, and exposes another segment of design engineers to the requirements of SMPS design. Understanding the performance characteristics and limitations of the power inductor can help designers specify the best device. This article addresses the basics of specifying an inductor for non-isolated SMPS. The examples given are applicable to low-profile surface-mount designs for applications such as Voltage Regulator Modules (VRMs) and Point of Load (POL) supplies, in addition to larger chassis based systems. Products & Services
Ferrite beads are used to suppress unwanted signals that can interfere with electrical devices such as DC supplies, transmission lines and cables. They provide attenuation of selected frequency bands.
Chip inductors are manufactured using semiconductor material.
IC power supplies are manufactured as integrated circuits.
Switch mode transformers (switching transformers) are used mainly in switching power supplies and DC-DC converters. They provide a storage element for transferring energy from input to output in discrete packets as required in switching power supplies, regulators and converters.
IC voltage regulators are three-terminal devices that provide a constant DC output voltage that is independent of the input voltage, output load current, and temperature. IC voltage regulators are used in power supplies that hold their output voltage constant over a wide range of load variations.
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Topics of Interest
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Technical Articles
Design Considerations: Specifying Power Inductors for Switch Mode Power Supplies (.pdf)
- Electrical Distribution and Protection Equipment
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