Texas Instruments Evaluation Module for UCC25230 DC/DC Switching Converter UCC25230EVM-754 UCC25230EVM-754 데이터 시트
제품 코드
UCC25230EVM-754
User
'
s Guide
SLUU670
–
November 2011
1.5-W Forward-Flyback DC-to-DC Converter for 48-V
Telecom Biasing Supply
1
Introduction
This EVM is to help evaluate the UCC25230 PWM device in a forward-flyback or flyback DC-to-DC
converter topology for a 48-V telecom biasing supply. The targeted application is telecom module design
with nominal 48-V input. The EVM is a dual-output converter. Each channel is nominal 12 V and 65 mA for
a total output power of 1.5 W. The design is made on a small footprint and low profile, the effective circuit
area for the bias portion is 0.6 in x 0.5 in x 0.15 in (L x W x H). The UCC25230 is a highly integrated PWM
controller operating as an isolated forward flyback. It has integrated high-side and low-side power switches
and a control circuit with all key converter functions included.
converter topology for a 48-V telecom biasing supply. The targeted application is telecom module design
with nominal 48-V input. The EVM is a dual-output converter. Each channel is nominal 12 V and 65 mA for
a total output power of 1.5 W. The design is made on a small footprint and low profile, the effective circuit
area for the bias portion is 0.6 in x 0.5 in x 0.15 in (L x W x H). The UCC25230 is a highly integrated PWM
controller operating as an isolated forward flyback. It has integrated high-side and low-side power switches
and a control circuit with all key converter functions included.
2
Description
The EVM is a 1.5-W forward-flyback DC-to-DC converter that accepts an input range of 36 V to 72 V DC
and converts it to two regulated output voltages, nominally 12 V and maximum 65-mA load current for
each channel. The two outputs are 1500-V level isolated from each other, with one channel on the primary
side and the other on the secondary side.
and converts it to two regulated output voltages, nominally 12 V and maximum 65-mA load current for
each channel. The two outputs are 1500-V level isolated from each other, with one channel on the primary
side and the other on the secondary side.
2.1
Typical Applications
•
Biasing Power to Power on the Main Controller (whether on the primary or the secondary side of the
isolation barrier)
isolation barrier)
•
48-V Telecom
•
Server Systems
•
Datacom
•
DSP
’
s, ASIC
’
s, and FPGA
’
s
2.2
Features
•
Start Up Directly from Telecom Input Voltage 36 V to 72 V DC
•
Two Regulated 12-V Outputs, 65-mA Maximum Load Current
•
Telecom Isolation from Primary-to-Secondary 1500 V
•
Small Footprint and Low Profile Design
•
Output Voltage Regulation (from no load to full load, and from low line to high line)
•
Input Voltage Status Signal, (manually or automatically set up)
•
Device Evaluation Test Points
•
All Surface Mount Components and Industry Leading-Edge Small Footprint
2
1.5-W Forward-Flyback DC-to-DC Converter for 48-V Telecom Biasing Supply
SLUU670
–
November 2011
Copyright
©
2011, Texas Instruments Incorporated