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Introducing the OKI-78SR DC-DC converter range for embedded applications from Murata

The OKI-78SR series of non-isolated switching regulator DC/DC power converters from Murata have been designed for embedded applications. The fixed single output converters offers both tight regulation and high efficiency directly at the power usage site, and is a direct plug-in replacement for TO-220 package 78xx series linear regulators. Typically, no extra components are required.

The OKI-78SR series has an input voltage range of 7-36V or 15-36V (12V output type) and output voltage options of 3.3V, 5V and 12V with max. output currents of 1.5A for 3.3 & 5V models and 1A for 12V model. Based on fixed-frequency buck switching topology, the high efficiency means very low heat and little electrical noise, requiring no external components. The converter’s efficiency is a very high from 85.5% up to 95.3%, eliminating the need for a heatsink that adds cost and increases complexity in the design and manufacturing processes.

Functional block diagram

The OKI-78SR DC/DC converters have been cleverly packaged in a form factor mimicking that of a three-terminal 78xx linear regulator and is available in both vertical and horizontal mounting options. The package size is just 10.4 x 16.5mm (WxH).

The OKI-78SR series operating temperature range is -40°C to +85°C and standard features include a factory-set Vout at 3.3V, 5V or 12V, short-circuit/over-current protection, UL/EJ/IEC 60950-1, second edition safety approvals and RoHS compliance.

The OKI-78SR series incorporates advanced assembly techniques and the latest fixed switching frequency technology for power conversion available today. The optional packaging configurations, safety features, high reliability, state-of-the-art figures for efficiency, thermal management, dynamic load response, industry standard package and OCP protection features offer an unmatched level of performance.

Murata’s OKI-78SR series is suitable in a wide range of applications, including computing, networking, telecommunications, industrial, aerospace and rail

Key Specifications

  • 7-36Vin (3.3 & 5Vout), 15-36Vin (12Vout)
  • Fixed Output: 3.3 or 5V @ 1.5A or 12V @ 1.0A
  • Vertical SIP or horizontal mount, small footprint package
  • “No heat sink” direct replacement for 3-terminal 78xx-series linear regulators
  • High efficiency with no external components
  • Short circuit protection
  • Outstanding thermal derating performance
  • UL/EN/IEC 60950-1, 2nd Edition safety approvals

Click here for more information or to buy from Anglia Live.

Click here to download the datasheet for OKI-78SR series

Anglia are offering customers FREE samples of the OKI-78SR series of non-isolated switching regulator DC/DC power converters from Murata, please fill in the form below to register for your FREE samples now.




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