DESCRIPTION

· The NCP1568 is a highly integrated AC-DC PWM controller designed for active clamp flyback topology.

· It employs a proprietary variable frequency algorithm for zero-voltage switching (ZVS) of Super-Junction or GaN FETs.

· The ZVS feature enhances power density and efficiency, simplifying EMI filter design.

· It includes a HV startup circuit, a strong low side driver, and a 5 V logic level driver for the active clamp FET.

· Suitable for AC-DC adapters, industrial, telecom, lighting, and other power density-critical applications.

FEATURES

· Active Clamp Flyback Topology aids in ZVS.

· Proprietary Multi-Mode Operation enhances light load efficiency.

· Proprietary Adaptive ZVS allows high-frequency operation while reducing EMI.

· Inbuilt Adaptive Dead-Time for both main and active clamp FETs.

· Peak Current-Mode Control with inbuilt slope compensation options.

· Flexible control scheme and programmability for configuration with external Silicon or GaN FETs.

· Customer programmable optional transition to DCM.

· Integrated Frequency Foldback with Minimum Frequency Clamp for standby mode performance.

· Minimum Frequency Clamp and Quiet Skip eliminate audible noise.

· Standby Power < 30 mW.

· 700 V Startup Circuit and AC Line Brownout Detect.

· Drivers: 0.85 A/1.5 A Source/Sink for Low Side, 65 mA/150 mA Active Clamp Driver Output.

· Programmable Frequency from 100 kHz to 1 MHz.

· Internal Soft-Start Timer with 4 options.

· Protection features include Dedicated FLT Pin, Adjustable Over Power Protection, Auto-Recovery, Latched Faults, and Internal Thermal Shutdown.

APPLICATIONS

· USB Power Delivery.

· Notebook Adapters.

· High Density Chargers.

· Industrial Power Supplies.