Secondary-side MOSFET driver reduces BOM cost
A secondary-side MOSFET driver from Diodes Incorporated,is claimed to deliver the smallest size, lowest BOM cost solution for synchronous rectification in 5 to 12V power supplies. The APR345 is suitable for line-powered adapters and chargers for consumer products such as smartphones and tablets, PVRs and IPTV boxes, cable and xDSL modems, datacomms equipment and other portable consumer/home appliances.
The device provides a high-performance power conversion solution for standby and auxiliary power supplies.
In conjunction with an external MOSFET for greater design flexibility, the APR345 driver provides synchronous secondary-side rectification control that supports various flyback circuit topologies operating in CCM, DCM and quasi-resonant modes. By sensing the external MOSFET’s drain‑to‑source voltage and driving the MOSFET to reduce the voltage drop, the APR345 reduces power dissipation and improves overall system efficiency.
Supplied in a SOT26 package and requiring a minimum of external components, the highly integrated APR345 provides a versatile, efficient and cost-effective rectification controller that occupies a smaller board footprint that competing devices.
The APR345 is priced at $0.37 each in 1,000 unit quantities.