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ON Semiconductor

ON Semiconductor’s NCP1568 is a highly integrated ACDC power controller which implements an active clamp flyback topology to produce high conversion efficiency.

The NCP1568 uses a proprietary variable-frequency algorithm to enable it to perform Zero-Voltage Switching (ZVS) of a converter’s MOSFETs across all line and load conditions. Because of the ZVS capability, the NCP1568 can operate at high switching frequencies up to 1MHz.

This enables the use of small magnetic components for high power density, while also achieving high efficiency.

The NCP1568’s high level of integration means that a complete AC-DC converter circuit can be implemented with a small number of external components. The controller includes a high-voltage start-up circuit, a low-side driver and a 5V logic-level driver for the active clamp transistor. It is compatible with both silicon superjunction MOSFETs and Gallium Nitride (GaN) FETs.

  • No audible noise
  • Frequency foldback with 31kHz minimum frequency
  • Frequency jittering
  • Programmable optional transition to discontinuous mode
  • Quiet-Skip technology
  • Short-circuit protection
  • AC-DC power converters
  • Battery pack chargers
  • High-density USB Power Delivery adapters
  • Notebook computer adapters
  • Industrial power supplies
  • Telecoms power supplies
  • Lighting


FTM Development Board

The NCP1568PDUHD90WGEVB evaluation board is a design for an efficient, high-density 90W USB Type-C®, USB Power Delivery 3.0 and Quick Charge 4 power adapter design featuring the NCP1568, the NCP1622 PFC controller, the NCP51530 half-bridge driver and the NCP4306 synchronous rectifier driver.