UCC27714EVM-551: 12V @ 50A, 370 ~ 410V in, Buck

Summary

This 600-W EVM was designed to demonstrate how the UCC28950 control device, UCC27524A and UCC27714 gate drivers could be used in high-efficiency applications by achieving ZVS from 50% to 100% load. To achieve this high efficiency the UCC28950 was designed to drive synchronous rectifiers on the secondary side of the full-bridge converter. The UCC28950 also incorporates a burst mode and DCM function to improve no-load efficiency. Please see UCC28950 data sheet for details.

The UCC277714 is a high-speed, high-voltage, high-side/low-side gate driver optimized for driving MOSFETs in high-frequency, switch-mode power supplies that are based on bridge-type topologies. It enables users to eliminate bulky gate-drive transformers in offline power supplies and achieve fast switching of power MOSFETs by virtue of its low propagation delay and high-peak-drive current.

The UCC27714EVM-551 is a 600-W phase-shifted, full-bridge converter that converts a 370-VDC to 410-VDC input to a regulated 12-V output. This converter was designed to maintain ZVS down to 50% load.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	296-43198-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Isolated
Voltage Out: Factory Set	12 V
Current Out	50 A
Voltage In	370 ~ 410 VDC
Efficiency @ Conditions	>94%, 410V in, 12V @ 28 ~ 100% Load >94%, 390V in, 12V @ 24 ~ 100% Load >94%, 370V in, 12V @ 22 ~ 100% Load
Voltage Out Range	11.4 ~ 12.6 V
Features	Current Limit (Adj. or Fixed) Light Load Mode Pre-Biased Startup Shutdown, Enable, Standby Soft Start Synchronizable Under Voltage Protection, Brown-Out
Switching Frequency
Standby Current [Typical]
Quiescent Current [Typical]
Component Count + Extras	119 + 46
Internal Switch	No
Design Author	Texas Instruments
Application / Target Market	Power: Auxiliary Power Supply Power: Industrial Power Telecom
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part	UCC27524A UCC27714 UCC28950
Date Created By Author	2015-07
Date Added To Library	2016-02