Thursday, July 30, 2009

Murata Expands Okami Range Of PoL DC/DC Converters

Murata Power Solutions has added a miniature 3A, SIP model to its Okami family of non-isolated point-of-load (PoL) DC/DC converters. The OKR-T/3-W12-C provides a solution for designs that require a wide input-voltage range. It offers a high-efficiency PoL solution where board space is limited. Typical applications include datacom routers and servers, industrial equipment such as light-emitting-diode (LED) signage, point-of-sale (PoS) systems and power amplifiers, where the new DC/DC converters are able to provide a cost-efficient way to meet the onboard power needs of ASICs, FPGAs, microprocessors and communications ICs.

The new addition to the Okami range has an input-voltage range of 4.5VDC to 14VDC (12VDC nominal) and a programmable output voltage from 0.591VDC to 6.0VDC. Despite overall dimensions of just 10.4mm (0.41in) x 16.5mm (0.65in) x 10.2mm (0.40in), the OKR-T/3-W12-C is said to achieve good thermal derating performance. Its power conversion efficiency of 93 per cent supports the growing demand for energy-efficient product designs, according to the company. The modules are capable of driving ceramic capacitive loads up to 200uF.

Based on 600kHz synchronous buck topology, the OKR-T/3-W12-C DC/DC converter features include programmable output voltage and on/off control, under-voltage lockout and over-current and over-temperature protection. In order to provide flexibility and additional choices to designers, Murata Power Solutions will soon introduce 6A and 10A versions of the miniature SIP-packaged OKR series in the same form factor and pin-out. The new converters are designed to meet all standard UL/EN/IEC 60950-1 safety, FCC EMI/RFI emissions and RoHS-6 hazardous-substance compliance.

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