Texas Instruments UCC27511DBVR | Demoboard TIDA-00520 / UCC29950EVM-631

Description

This evaluation module uses the UCC29950 CCM PFC and LLC Combo Controller in a 300-W converterThe input accepts a voltage range of 90 VAC to 265 VAC. It has an output voltage of 12 V and a maximumoutput current of 25 A. Refer to the UCC29950 datasheet, (TI Literature Number SLUSC18), for full specsand details about the controller features. This EVM makes use of the device features to control a twostagepower supply that is rated for 300-W output power.An overload timer tracks the extent and duration of overload and trips the overload protection when thecurrent exceeds the over-current protection profile described in the datasheet. The overload protectionturns the power stages off and then attempts restarts at 1 second intervals.If the VCC level at the UC29950 controller falls below the UVLO threshold the controller shuts down. It willattempt a restart when VCC recovers.The over-temperature protection feature of the UCC29950 trips If the temperature of the device exceedsthe thermal shutdown temperature. The device restarts once the temperature falls to the restarttemperature.The UCC29950 employs frequency dithering to reduce conducted emissions and therefore reduce the sizeand cost of the EMI filter.This user’s guide provides the schematic, component list, assembly drawing, art work and test set upnecessary to evaluate the UCC29950EVM-631.2

Features

UCC29950EVM-631 features include:

• AC Input Range 90 VAC to 264 VAC
• DC Output of 12 V, 25 A
• A CCM Boost Power Factor Correction Input Stage for High-Power Factor and High Efficiency
• An LLC Output Stage for High Efficiency
• Low Start-Up Current, with Integrated High-Voltage Start-Up Control
• On/Off Control of PFC Stage and PFC / LLC Stages
• Current Sense Inputs for PFC / LLC Overload Protection
• Line Brownout Protection
• PFC Bus Over-Voltage and Under-Voltage Protection
• X-Cap Discharge Function for Reduced System Standby Power Consumption
• Three Level LLC Over-Current Protection for Loads with High-Peak Power Requirements
• Short Circuit Protection
• Over Temperature Protection
• Operation in Self Bias or Aux Bias Modes

Typical applications

• Audio
• Televisions
• Industrial Power
• 80+ SILVER PC Silver Box
• High Density Adapters
• Gaming
• High Efficiency AC-to-DC server power supplies
• Lighting Drivers

More information

• Datasheet
• IC product information