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Eighth-brick chips replace 100W quarter-bricks

Posted: 08 Sep 2009     Print Version  Bookmark and Share

Keywords:DC/DC converter  quarter-brick device  mobile application 

UWE DC/DC converter

Murata Power Solutions rolls two new eighth-brick, 4:1 ultra wide input isolated DC/DC converters. The UWE-5/15-Q48N-C (15A@5Vdc) and the UWE-15/5-Q12P-C (5A@15Vdc) provide up to 75W of output power. This makes them suited as replacements for applications that use 100W quarter-brick devices where the full 100W power is not needed.

An ultra wide-input voltage range of 18Vdc to 75Vdc (UWE-5/15-Q48N-C) and 9Vdc to 36Vdc (UWE-15/5-Q12P-C) helps simplify the integration of the new DC/DC converters in customer designs. Typical applications include mobile and battery-powered devices, test equipment, telecoms and wireless, plus distributed power architectures in the industrial, high reliability, aerospace, networking and wireless, and telecom and office equipment markets.

The eighth-brick industry standard through-hole package has overall dimensions of 22.9mm x 58.4mm x 9.1mm high. Operating temperature range is -40°C to +85°C with derating. The UWE series has a synchronous rectifier design that results in typical high efficiency ratings of 90 per cent, plus low power dissipation with no reverse output conduction. This allows the DC/DC converter to be used without fans or temperature derating in most applications. For the most demanding environments, customers can specify an optional thermal mounting base plate.

The UWE series provides 1,500Vdc isolation (basic insulation) to assure safety, and fully differential (floating) operation for maximum application flexibility. All models include remote On/Off control, trim, and remote sense functions to provide compensation for line drop errors at high output currents. Extensive self-protection design features including pre-bias operation, input under-voltage, and output short circuit, over-current and over temperature protection prevent potential damage to both the converter and outside circuits. Overloads automatically recover using the 'hiccup' technique upon fault removal.

The new models and all existing UWE wide input, isolated eighth-brick DC/DC converters meet UL/EN/IEC 60950-1, CAN/CSA-C22.2 No. 60950-1 safety approvals and comply with the requirements of RoHS-6 and FCC RFI/EMI certification.

Typical price for the UWE series, depending on the model, starts at about Rs.1,847.36 ($38) in OEM quantities. Lead-times for the entire UWE family range from stock to 12 weeks ARO.

Get related application notes and technical articles on Power Design India.

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