Texas Instruments UCC24630DBV | Demoboard TIDA-00519

Description

This evaluation module uses the UCC24630 synchronous rectifier controller in a 65-W flyback converterthat exceeds US and European agency standards for efficiency during active load and no-load powerconsumption for low-voltage AC-to-DC external power supplies. The input accepts a voltage range of 85VAC to 265 VAC. The output voltage provides a regulated output voltage of 19.5 VDC at a load current of upto 3.33 A. The LM5023 uses the transformer auxiliary winding for demagnetization detection to ensureCritical Conduction Mode (CrCM) operation. The LM5023 features a hiccup mode for over currentprotection with an auto restart to reduce the stress on the power components during an overload. A skipcyclemode helps reduce power consumption at light loads for energy conservation applications. TheLM5023 also uses the transformer auxiliary winding for output overvoltage (OVP) protection. If an OVPfault is detected the LM5023 latches off the power supply.The UCC24630 uses a V/s balancing control method since the device is not directly connected to theMOSFET drain. The has a programmable false triggering filter, a frequency detector to automaticallyswitch to standby mode and pin fault protections.This User’s Guide provides the schematic, component list, assembly drawing, art work and test set upnecessary to evaluate the UCC24630 in a typical offline flyback converter application.

Features

The UCC24630EVM-636 features include:

• Isolated 19.5-V, 65-W output.
• Universal offline input voltage range.
• Meets requirements for average load efficiency and no load power consumption of US DOE Standardfor External Power Supplies.
• Meets requirements for average and 10% load efficiency and no-load power consumption of EC Codeof Conduct on Energy Efficiency of External Power Supplies (Version 5) Tier 2.
• Line Brown out protection, using external circuitry
• EN55022 Class B EMI Compliance.

Typical applications

• Standby Supply for TV and Desktop
• Power Supply for DVD Players, Set-Top Box, Gaming, Printers
• Battery Chargers
• USB Compliant Adapters and Chargers for Consumer Electronics (smart phones, tablets, cameras)

More information

• Datasheet
• IC product information