Transient voltage suppression diodes increase higher fuel efficiency

Microsemi's TVS diodes are highly compact, 1,000W, surface mount, single channel devices featuring superior thermal and power handling capabilities and provide higher reliability functions in avionics applications such as engine control units and actuator controls, power distribution, environmental control, communications and instrumentation systems. Additional applications include circuit protection for ruggedised handheld radios, GPS, communications test equipment, industrial logging equipment, power supplies and marine and aircraft electrical systems.

"With increased aircraft electrification continuing to increase, our new devices are suited to capitalise on this market growth. From a global demand perspective, we estimate the overall market for protection devices is likely to reach $1bn by 2018," said Christophe Warin, senior director of strategic marketing, Microsemi's Power Discrete and Modules Group. "As a leader in high-reliability solutions, Microsemi continues to execute on a full range of innovative product developments to support the stringent and evolving needs of this industry."

Leveraging the company's 50-year heritage in high-reliability TVS technology, Microsemi's TVS diodes provide aircraft and other electrical systems with critical protection by going into avalanche breakdown within no more than a few nanoseconds after a strike, clamping the transient voltage and routing its current to the ground. The Powermite1 MUPT series also features oxide-passivated chips with high-temperature solder bonds for high surge capability and negligible electrical degradation under repeated surge conditions. Both unidirectional and bidirectional configurations are available. 

Measuring less than 1x2mm², the devices' Powermite packaging provides a dramatic one-third reduction in size compared with two-leaded devices in conventional surface mount assembly (SMA) packages. Compared with similarly-sized SOT-23 devices, Powermite delivers superior thermal and power handling capability. In addition to its size advantages, the Powermite package includes a fully metallic bottom (anode) side that eliminates the possibility of solder flux entrapment at assembly, while a unique locking tab design serves as an integral heat sink. Its innovative design makes this device fully compatible for use with automatic insertion equipment. 

The Powermite1 MUPT series is 100% surge tested and can be supplied in various 'screened' versions (M, MA, MXL and MX) that have been exposed to levels of additional screening tests (similar to those applied to JANTX military-grade devices) to improve reliability. The devices are offered in voltages ranging from 5 to 48V and comply with Moisture classification Level 1 with no dry pack required per IPC/JEDEC J-STD-020B. Devices are rated to withstand a 10/1,000 microsecond pulse and the peak pulse power rating is 150W at 10/1,000 microseconds. The 1,000W rating is for an 8/20us microsecond pulse. 

Microsemi: Continued Leadership in TVS Devices Microsemi offers the industry's broadest portfolio of TVS devices for applications within the avionics, defense, industrial, automotive and communications markets. Microsemi's TVS devices have been specifically deployed to protect engine control, actuator control, environmental control, power distribution, communications and instrumentation subsystems across all major current commercial airframes as well as military airframes in use worldwide.