ON Semiconductor Launches High-Efficiency USB Power Delivery Solution

Higher frequency AC-DC controllers and drivers improve industrial designs while ensuring optimal efficiency across the entire load range

2022年5月13日—领先于智能电源和智能感知技术的安森美(onsemi)，推出用于 USB 供电 (PD) 设计的三件一套新产品。新的控制器和驱动器提供创新的功能，能显著减少高能效 AC-DC 电源的物料单(BOM)含量，尤其是在100 W 以上的负载范围。

“USB PD is an important and growing application, but meeting its efficiency and size requirements is a significant challenge for designers,” said Shane Chilton, senior director of ON Semiconductor’s Power Conversion Solutions Division. “With our new suite of products, designers can remove up to 15 components from their existing BOM, reducing design costs while ensuring that the stringent efficiency and performance standards for USB PD applications are met.” 

The NCP1345 is a quasi-resonant (QR) flyback controller for high-performance offline power supplies and USB Type-C PD fast charging. High-frequency QR operation (up to 350 kHz) reduces the size of magnetic components. With built-in constant output current limit, the NCP1345 is compatible with limited power supply (LPS) requirements, while fast frequency foldback ensures excellent light-load efficiency.

Another new product from ON Semiconductor, NCP1623, is a small-sized boost power factor correction (PFC) controller with a rated power of 300 W, which is used in USB PD fast charging adapters and computer power supplies. The device operates in critical conduction mode (CrM) when heavily loaded, and then enters discontinuous conduction mode (DCM) as the load decreases to maximize energy efficiency at both rated and light loads. NCP1623 can increase energy efficiency to 2% at low input voltage, power consumption in sleep mode is <100 μA, and optimizes the no-load input power state.

The NCP4307 is a high performance driver that can be used with synchronous rectification (SR) MOSFETs in a variety of high performance switching power supply topologies. The device will be self-powered from an internal 200 V CS pin, enabling high bridge configuration and low VOUT without the need for an auxiliary supply. The dual VCC pins select the best VCC source to minimize losses, thereby optimizing the design of wide range VOUT applications.