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STMicroelectronics Reveals Flexible Synchronous Rectifier for Efficient Silicon or GaN Converters - Helps simplify operation and save energy in industrial power supplies, portable-device chargers, and AC/DC adapters - ST.com
STMicroelectronics Reveals Flexible Synchronous Rectifier for Efficient Silicon or GaN Converters

 

PRZOOM - /newswire/ - Geneva, Switzerland, 2024/02/28 - Helps simplify operation and save energy in industrial power supplies, portable-device chargers, and AC/DC adapters - ST.com. [NYSE: STM]

   
 
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STMicroelectronics’ SRK1004 synchronous-rectifier controller eases the design and enhances the efficiency of converters built with silicon or GaN transistors, including industrial power supplies, portable-device chargers, and AC/DC adapters.

Capable of withstanding up to 190V at its sense input, the SRK1004 can be connected in a high-side or low-side configuration. Four variants let users avoid complex calculations by optimizing their design through device selection alone, selecting gate-drive voltage between 5.5V or 9V, with logic-level MOSFETs, standard MOSFETs, or GaN transistors. Suitable for noncomplementary active clamp, resonant, and quasi-resonant (QR) flyback topologies, the SRK1004 introduces a next-generation turn-off algorithm that simplifies operation and saves energy.

The features of this controller enable converters to provide a high output power rating within compact dimensions. The operating frequency can be up to 500kHz, allowing the use of small magnetic components as well as maximizing the benefits of wide-bandgap technology when using GaN transistors. The controller is fabricated in ST’s silicon-on-insulator (SOI) process, which ensures robust performance while permitting a tiny 2mm x 2mm DFN-6L package.

By operating with a supply voltage from 4V to 36V, the SRK1004 can be powered from a variety of standard industrial bus voltages. The wide input-voltage range also provides flexibility to adjust the step-down ratio for optimum efficiency. Also, with fast-acting short-circuit detection built-in, the controller helps build rugged and reliable equipment.

Of the four variants introduced, the SRK1004A and SRK1004B are configured for 5.5V gate-drive voltage and can be used with logic-level MOSFETs or GaN transistors. The SRK1004C and SRK1004D for 9V gate-drive voltage are suited to MOSFETs designed for standard gate-drive signals.

All variants of the SRK1004x synchronous rectification controllers are in production now and available from $0.45 for orders of 1000 units. The evaluation boards, EVLSRK1004A, EVLSRK1004B, EVLSRK1004C, and EVLSRK1004D, are also available to accelerate evaluation and design start with each type, at the budgetary price of $50.00.

About STMicroelectronics

At ST (st.com), we are over 50,000 creators and makers of semiconductor technologies mastering the semiconductor supply chain with state-of-the-art manufacturing facilities. An integrated device manufacturer, we work with more than 200,000 customers and thousands of partners to design and build products, solutions, and ecosystems that address their challenges and opportunities, and the need to support a more sustainable world. Our technologies enable smarter mobility, more efficient power and energy management, and the wide-scale deployment of cloud-connected autonomous things. We are committed to achieving our goal to become carbon neutral on scope 1 and 2 and partially scope 3 by 2027.

 
 
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STMicroelectronics Reveals Flexible Synchronous Rectifier for Efficient Silicon or GaN Converters

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