Bourns power supply solutions
An offline AC-DC power supply includes stages such as PFC (power factor correction), EMI (electromagnetic interference) filters, an isolation barrier, transformer, and non-isolating DC-DC switch mode power supplies (SMPS), which are based upon various topologies and convert DC voltages to different levels of DC voltage for specific applications. Bourns offers a wide range of components for linear and switch mode power supplies that provide high-reliability performance for smaller and more compact designs, including circuit-protection devices, power transformers, inductors, resistors and rectifier diodes.
Primary AC circuit protection
There is a wide range of VAC circuit protection devices available to protect offline power supply circuits on the primary side including: surge protection devices (SPDs), power TVS (transient voltage suppressor) diodes, AC transient protectors, metal oxide varistors (MOVs), gas discharge tubes (GDTs), and Multifuse® resettable fuses.
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EMI filter
EMI noise suppression is a key factor to consider in the design of many products and applications. Designed for use on both power and signal lines, Bourns range of inductors and common-mode chokes offer excellent EMI suppression capability over a wide frequency spectrum.
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Rectifier bridge
Designers of electronic systems are faced with increasing board space constraints, thus driving the requirement for alternative packaging technologies. The highest levels of functional integration and miniaturisation have been achieved with Bourns’ latest chip-packaged bridge rectifier diodes, making them ideal for space-restricted rectifier bridge applications.
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Power factor correction (PFC)
Systems that have a low, or uncorrected, power factor (PF) will impact on losses in the local power conversion system and electrical distribution system. Bourns offers a wide range of power inductors and snubber and current-sense resistors, including wire-wound, thick-film, metal-strip and metal element types, to help engineers meet PFC application requirements.
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Isolating DC-DC SMPS (various switching topologies)
In addition to power inductors, wire-wound snubber and current-sense resistors that target power supply module and motor drive and control applications, Bourns offers a range of power transformers for use in isolating DC/DC switch-mode power supplies.
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Non-isolating DC-DC SMPS
Bourns offers a variety of power inductors, resistors and trimming potentiometers that meet the requirements non isolated DC-DC converter design while addressing the need for smaller, yet higher power devices.
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Secondary DC circuit protection
Protection of end-application equipment on the load side of switched mode power supplies is clearly an important issue. Bourns supplies a range of options with protection devices and solutions for the VDC secondary DC circuit, including TVS diodes, Multifuse® resettable fuses, TISP™ thyristor surge protectors, SinglFuse™ chip fuses, and TBU® high-speed protectors.
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