Highly efficient USB power delivery solutions now available

onsemi has released three products for USB Power Delivery design. The new controllers and driver include innovative features that noticeably decrease BOM content of high-efficiency AC/DC power supplies, particularly for load ranges over 100W.

“USB PD is an important and growing application but meeting its efficiency and size requirements is a tough challenge for designers,” said Shane Chilton, senior director, Power Conversion Solutions Group, onsemi. “Thanks to our suite of products, designers can remove up to 15 components from their existing BOM reducing the cost of their designs while ensuring that they meet the demanding efficiency and performance standards of the application.”

The NCP1345 is a Quasi-Resonant flyback controller for high-performance off-line power supplies and USB Type-C PD fast charging applications. The high-frequency QR operation (up to 350kHz) enables the magnetic component size to decrease. It is compatible with the Limited Power Source necessity due to the inbuilt constant output current limit. At the same time, rapid frequency foldback features provide excellent light load efficiency.

The NCP1623 is a small form factor Boost PFC controller rated at up to 300W for USB PD fast charging adapters and computing power supplies. The device functions in critical conduction mode at heavy loads before entering discontinuous conduction mode as the load decreases, maximising the efficiency at nominal and light loads. It can improve efficiency by up to 2% at low input voltages and provides a sleep mode of <100μA optimising the no-load input power state.

The NCP4307 is a high-performance driver for usage with synchronous rectification MOSFETs in multiple high-performance switch-mode power supplies topologies. The device self-supplies from an internal 200V CS pin, allowing high side configuration and low VOUT without needing an auxiliary supply. The dual VCC pin selects the optimal VCC source to minimise losses, thereby optimising designs for broad range VOUT applications.