Texas Instruments UCC2897A Evaluation Module UCC2897AEVM UCC2897AEVM Datenbogen
Produktcode
UCC2897AEVM
www.ti.com
Description
2.1
Typical Applications
Isolated telecom 48-V input systems requiring high efficiency and high power density for very low output
voltage, high current converter applications, including:
voltage, high current converter applications, including:
•
Server Systems
•
Datacom
•
Telecom
•
DSP’s, ASIC’s, FPGA’s
2.2
Features
•
ZVS transformer reset using active clamp technique in forward converter.
•
All surface mount components, double sided half brick (2.2” x 2.28” x 0.5”).
•
Low-side active clamp with programmable dead time for ZVS.
•
Current-Mode Control with bi-directional sync function.
•
Internal PWM slope compensation.
•
Start up directly from telecom input voltage.
•
Synchronous rectifier output stage allows high efficiency operation.
•
Programmable soft start.
•
Up to 30 A
DC
output current.
•
Regulation to zero load current.
•
Non-latching, cycle-by-cycle over-current and short circuit protection.
•
Non-latching, Input under-voltage protection.
•
Non-latching, Input over-voltage protection.
•
1500-V isolation primary to secondary.
3
SLUU357 – November 2009
48-V to 3.3-V Forward Converter with Active Clamp Reset —Using the
UCC2897A Active Clamp Current Mode —PWM Controller
Copyright © 2009, Texas Instruments Incorporated