Texas Instruments Evaluation Module for UCC28250 Advanced PWM Controller with Pre-Bias Operation UCC28250EVM-564 UCC28250EVM-564 데이터 시트
제품 코드
UCC28250EVM-564
User
'
s Guide
SLUU441A
–
September 2010
–
Revised October 2011
Half-Bridge DC-to-DC Converter
With Secondary-Side Control
1
Introduction
This EVM is to aid in evaluating UCC28250 PWM device with secondary-side control in DC-to-DC
symmetrical half-bridge converter topology. The targeted application is telecom module design with
nominal 48-V input. UCC28250 is a PWM controller that can be used for primary-side control or
secondary-side control. In this EVM, UCC28250 is placed at the secondary side to make secondary-side
control.
symmetrical half-bridge converter topology. The targeted application is telecom module design with
nominal 48-V input. UCC28250 is a PWM controller that can be used for primary-side control or
secondary-side control. In this EVM, UCC28250 is placed at the secondary side to make secondary-side
control.
2
Description
The EVM is a 100-W symmetrical half-bridge DC-to-DC converter that converts 36 V to 75 V DC to a
regulated output voltage 3.3 V and maximum 30-A load current.
regulated output voltage 3.3 V and maximum 30-A load current.
2.1
Typical Applications
•
Telecom Power Supplies with Secondary-Side Control
•
Server Systems
•
Datacom
•
DSP
’
s, ASIC
’
s, and FPGA
’
s
2.2
Features
•
Start up from telecom input voltage 36 V to 75 V DC with initial assistance of external auxiliary supply
on the secondary side.
on the secondary side.
•
Regulated output voltage 3.3 V with maximum 30-A load current.
•
Smooth and monotonic output voltage turn on with up to 90% pre-biased output voltage.
•
Output voltage regulation from no load to full load, and from low line to high line.
•
Secondary-side Enable ON/OFF function and manual switch.
•
Secondary-side control.
•
Voltage-mode control.
•
Control-driven synchronous rectifier.
•
Non-latching output over voltage protection.
•
Hiccup over current protection.
•
Telecom basic isolation from primary to secondary 1500 V.
CAUTION
Before doing any test with this EVM, please read this document especially
through
. Without a thorough reading of this document,
strange behavior of operation and possible damage may be resulted in the test.
2
Half-Bridge DC-to-DC Converter
—
With Secondary-Side Control
SLUU441A
–
September 2010
–
Revised October 2011
Copyright
©
2010
–
2011, Texas Instruments Incorporated