Murata eighth-brick 240-W DC-DC converter achieves 94.5% efficiency



Click image to enlarge: Murata model RBE-12/20-D48

Murata has anounced the RBE series of isolated DC-DC converters. These converters are designed for a broad range of applications including 12 V DC IBA (intermediate bus architecture) or distributed power-based applications used in servers, wireless base-stations, data storage, telecom switches, and networking equipment. The RBE-12/20-D48 model will deliver a regulated 12 V output @ 240 W from a nominal 48 V DC input. With an efficiency of 94.5%, most applications with forced air cooling will not require an external heat sink. For applications where there is no forced air cooling or the operating temperature range is high, an optional base plate is available that will allow for attaching a heat sink. The RBE DC-DC converter meets the requirements of the DOSA (Distributed power Open Standards Alliance) eighth-brick configuration measuring 58.42 x 22.86 x 10.16 mm (2.3 x 0.9 x 0.4 inches). The standard module is a through-hole mounted package, configured as an open frame converter with 4.6mm pins and negative logic. Optional configurations include various pin lengths to eliminate secondary process for trimming pins, positive logic control, conformal coating, and the base plate for conduction cooling applications. Protection features include thermal shutdown with auto restart (hiccup), over-current and short-circuit protection with auto restart, and input under-voltage lockout. The converter is isolated to 2250 V DC with a basic insulation system meeting the requirements for PoE applications and is compliant with the internationally recognized safety standards UL/EN/IEC 60950. Murata