Avago Technologies a annoncé aujourd'hui une solution unique et rentable de capteur de contrainte à base de fibre optique polymère (POF) pour les applications industrielles. Basée sur une technique d’interrogation de phase optique (OPI) brevetée, mise au point par Avago Technologies, la solution de détection permet d’utiliser POF – facilement disponible – comme capteur de contraint...

The ACPL-32JT, a new automotive 2.5A smart gate drive optocoupler device, has been announced by Avago Technologies. Enabling isolated power supply in automotive powertrain systems, the ACPL-32JT features an integrated flyback controller supporting regulated output voltage and a full set of fail-safe IGBT diagnostics, protection and fault reporting in support of automotive functional safety requirements.

Avago Technologies a dévoilé aujourd'hui le ACPL-32JT, le nouvel appareil optocoupleur intelligent 2.5A pour l'automobile permettant de disposer d'une alimentation isolée dans les systèmes motopropulseurs de véhicules. Cet appareil est équipé d'un contrôleur " flyback " intégré qui prend en charge la tension de sortie régulée ainsi que toute une série de dia...

Designers of Small Cell BTS systems face many technical challenges when specifying and designing the RF front-end. In many ways, those challenges are similar to the ones faced by designers of mobile handsets. There are issues with size, power consumption, power added efficiency, receiver sensitivity, frequency band coverage, coexistence with other radios, and hardware design and layout flexibility.

Avago has today revealed that its 28nm Serializer/Deserializer core has achieved 32 Gbps performance while withstanding up to 40 dB of channel loss. This latest SerDes core not only redefines the data rate feasibility for chip-to-chip, portside and backplane interfaces, but also reflects Avago’s ongoing commitment to offer leading-edge solutions for data center and enterprise applications.

Avago’s new AEC Q100 grade optocouplers, the ACPL-K4xT/K7xT series has significantly lower LED driving current compared to conventional optocouplers, thus lowering system power consumption. Additionally, the unique stretched surface-mount package reduces the optocoupler’s footprint and volume while improving the insulation clearance and creepage, thus increasing the insolation voltage rating. The ACPL-K4xT//K7xT family of digital optocouplers...

Avago Technologies R2Coupler optocouplers employ Avago’s high reliability LEDs to provide isolated signal transmission. Avago automotive-grade LEDs do not degrade across the typical mission profile of automotive vehicles. LED technology is a mature technology. Avago R2Coupler optocouplers use advanced and sophisticated methods for manufacturing LEDs that have been improved and refined over 35 years. By Roy Tan of Avago Technologies.

There are many challenges associated with high-voltage Li-ion battery-stack management in all-electric or hybrid automotive applications. Charge and discharge cycles must be monitored and controlled, and the battery stack, which often delivers voltages of several hundred volts, has to be isolated for safety concerns. In particular, this paper will examine the requirements for Li-ion cell monitoring, and review the architecture and components used...

Insulated-gate bipolar transistors require full protection to avoid damage and failures resulting from conditions such as short circuits, overloads and overvoltages. The protection is key to ensuring safe and stable power-converter operations in applications such as motor drives and solar and wind power generation systems. To detect over-current and overload conditions, isolation amplifiers featuring fast response or fast fault feedback can be us...

Isolation components such as optocouplers that are used in applications that have user safety issues as a key aspect must not fail under continuous high-working-voltage bias conditions. Safety hazards exist and human life is at risk when such insulation fails and the high voltages come in contact with the user. To prevent such occurrences, continuous working voltage ratings and test methodologies are regulated by international component standards...

Optocouplers are used extensively for high-voltage isolation and electrical noise rejection – two essential requirements for transmitting correct information between different voltage potentials within an electrical system. Such systems must be able to operate reliably for many years when used in industrial, medical, renewable energy environments, and any other system that has a long expected operating lifetime. By Foo Chwan Jye of Avago Techno...

Electrical systems, no matter what their purpose, share three primary requirements: reliable, safe, and long life operation. To ensure safe operation, users must be double insulated from any dangerous high voltages the equipment employs. To ensure reliable and long life operation, control electronics must also be protected from hazards such as electromagnetic interference and voltage spikes. Avago’s optocouplers provide safety and protection un...

Avago Technologies is the first fibre optic module vendor to product release a fully compliant 40Gb Ethernet QSFP+ optical transceiver. Leveraging its history in delivering 850nm VCSEL based solutions, Avago QSFP+ modules deliver excellent high speed optical / electrical performance coupled with low power dissipation. Using bundled fibre cables and MPO connectors, port density is triple that of SFP+ modules, and power consumption is reduced from ...

High common-mode noise is a significant problem that automotive system designers must overcome when designing a practical and reliable powertrain drive system. Common-mode noise (also known as dV/dt noise) is generated naturally within a system when there is high-frequency switching in the high-voltage power inverters and other power supplies. This article will discuss the various sources of dV/dt noise in a hybrid powertrain drive and suggest se...

Fieldbus (or field bus) is the name of a family of industrial computer network protocols used for real-time distributed control. It is a way to connect instruments in a manufacturing plant. By Vincent CHING and FOO Chwan Jye of Avago Technologies.

The ACPL-x6xL products are optically coupled ultra-low power 10 MBd digital CMOS optocouplers that operate with low power consumption, especially when the light emitting diode operates at low current. When a current is applied to drive the LED, common mode rejection can be affected by leakage paths inherent to the LED. This paper describes the optimization of CMR performance with split limiting resistors at the LED. By YEE Chee Weng and PENG Jia ...

Patient contacts in medical devices must be isolated from ac mains to protect the patient from hazardous voltage shocks. In medical imaging devices, large quantities of video imaging data need to be transferred from image sensor to image processor while maintaining high levels of electrical isolation so the sensor won’t shock the patient. By Zhang Bin and Harold Tisbe of Avago Technologies.

In addition to industrial applications of variable-speed motor drives, the home appliance market is another major area where three-phase pulse width modulated motor control drives are finding increasing application. Innumerable motors can be found in a typical home. Indeed, the quality of life enjoyed today may be directly attributable to the existence of the electric motor. By Jamshed N. Khan, Optocoupler Applications Engineer, Avago Technologie...

Hybrid electric vehicles save fuel because of their electric motor drive. In an HEV, the propulsion system can be configured several ways, for example in the electric motor assisted mode or in the fully electric motor drive mode. For electric motor drive an inverter system is required to deliver powerful and efficient drive to the electric motor.

The introduction of electric and hybrid electric vehicles have added high voltage electric modules into the car. The battery stack in a hybrid vehicle can be in excess of 150 V, which is then boosted to a much higher voltage level for the inverter driving the electric motor. By Kenji Yamamoto and Andy Poh of Avago Technologies.