Onsemi NCP1568 | Demoboard NCP1568CCCV

Description

This evaluation board manual describes a 60 W universal input 5 V,9 V, 12 V, 15 V and 20 V output evaluation board for laptop adapters. This featured power supply is an active−clamp flyback topology utilizing ON Semiconductor NCP1568 PWM controller, NCP51530 HB Driver, NCP4305 SR Controller and FDMS86202 SR FET. Thismanual provides complete circuit schematic, PCB, BOM and transformer information of the evaluation board. It also provide efficiency, transient response, output ripple and thermal data of theevaluation board.This design utilized NCP1568 and NCP51530 for the active clamp flyback topology. Active clamp flyback topology effectively recycles the leakage energy. Another feature of this topology is the ZVSoperation of the power MOSFETS. Because of no leakage losses and ZVS operation, this topology is suited for high frequency operation which results in size reduction of the transformer. Hence Active clampflyback topology is well suited for high power density sub 100 W power supplies. A ZVS fixed switching frequency power converter also simplifies EMI design and can be easily designed to avoid interference with other sensitive circuits in the system.

Features

• Universal AC Input Operation (90 – 265 Vac)
• High Full Load and Average Efficiency
• Low Standby Power
• Very Low Ripple and Noise
• High Frequency Operation up to 450 kHz
• Inherent SCP and OCP Protection
• Thermal and OVP Protection
• Adaptive Frequency Operation based on AC Input and Output Load Conditions
• Adaptive ZVS Operation
• Smaller EMI Components
• Multiple Probe Points for Evaluation
• Smooth Startup Operation

Typical applications

• AC-DC Power Conversion, USB Power Delivery, Qualcomm Quick Charge

More information

• Datasheet
• IC product information