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Diodes Inc. - Super barrier rectifier optimized for solid-state retrofit MR16 LED lamps

Technology Cover
Post Date: 2016-09-16, Diodes Incorporated
Diodes Incorporated has introduced the SBRT3M40P1 channel super barrier rectifier (SBR), which is designed to provide low forward voltage drop in a small form factor while maintaining low reverse current leakage. The features of this device meet the requirements for input bridge rectifiers in solid state lighting (SSL) applications. These applications focus on 12V AC LED retrofit lamps, which provide more efficient and longer than the popular MR16 halogen bulbs. Service life. The Trench SBR with a rated current of 40V operates at + 125C and has a low reverse current leakage of only 1.2mA when 12V is blocked, thereby resisting thermal runaway in the high ambient temperature environment modified by MR16. In addition, it maximizes the efficiency and power density of a 1A bridge rectifier with a forward voltage drop of only 0.29V in the compact PowerDI 123 footprint of 6.75mm2. To minimize forward loss, the SBRT3U40P1 is an alternative device that provides a forward voltage drop of 0.25V, but the reverse current leakage increases to 4mA. By selecting different forward losses and reverse leakages, the rectifier circuit can be optimized based on the duty cycle requirements and operating temperature of the waveform. The 40V blocking function usually provides sufficient headroom for 12V AC input power. However, if the line regulation rate is not good, the SBRT3M60P1 and SBRT3U60P1 with 60V blocking capability will provide extra margin, but slightly higher forward voltage drop of 0.34V and 0.28V, respectively. Although a conventional SMA package option is available, the PowerDI123 package has a smaller footprint (6.75mm2, and 16mm2) and a lower height profile (less than 1mm, and 2mm), suitable for applications such as the targeted MR16 retrofit bulb market Space-critical applications. the company.