Onsemi has released three new controllers and drivers including innovative features that significantly reduce the BOM content of high-efficiency AC/DC power supplies, especially at load ranges over 100W. Products designed primarily for USB power delivery.
Shane Chilton, senior director, Power Conversion Solutions Group said："USB PD is an important and growing application, but meeting its efficiency and size requirements is a daunting challenge for designers," "Thanks to our product suite, Designers can remove up to 15 components from an existing BOM, reducing design costs while ensuring that the efficiency and performance standards required by the application are met. "
The NCP4307 is a high performance driver with dual VCC pins to select the optimal VCC source to minimize losses, thereby optimizing the design of a wide range of VOUT applications. For use with synchronous rectification MOSFETs in a variety of high-performance switch-mode power supply topologies. The device is self-powered from the internal 200V CS pin, allowing high-side configuration and low VOUT without the need for an auxiliary power supply.
The NCP1345 is a quasi-resonant flyback controller that is compatible with limited power supply needs due to the built-in constant output current limit. At the same time, the fast frequency folding characteristic provides excellent light load efficiency. For high performance offline power and USB Type-C PD fast charging applications. High frequency QR operation (up to 350kHz) can reduce the size of the magnetic components.
The NCP1623 is a small Boost PFC controller rated up to 300W, the device is in critical conduction mode at heavy loads before the load drops into discontinuous conduction mode, maximizing efficiency at rated and light loads. Efficiency can be improved by 2% at low input voltages and a sleep mode of 100µA is provided to optimize no-load input power state. Works with USB PD fast charging adapters and computing power supplies.
