UCC28950-Q1 Datasheet, PDF (1/48 Pages) Texas Instruments – Phase-Shifted Full-Bridge Controller With Synchronous Rectification

UCC28950-Q1
www.ti.com
SLUSAG4A – APRIL 2011 – REVISED JULY 2012
Phase-Shifted Full-Bridge Controller With Synchronous Rectification
Check for Samples: UCC28950-Q1
FEATURES
1
• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following
Results:
– Device Temperature Grade 1: –40ºC to
125ºC Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• Enhanced Wide-Range Resonant Zero-Voltage
Switching (ZVS) Capability
• Direct Synchronous Rectifier (SR) Control
• Light-Load Efficiency Management Including
– Burst Mode Operation
– Discontinuous Conduction Mode (DCM),
Dynamic SR On/Off Control With
Programmable Threshold
– Programmable Adaptive Delay
• Average- or Peak-Current Mode Control With
Programmable Slope Compensation and
Voltage-Mode Control
• Closed-Loop Soft-Start and Enable Function
• Programmable Switching Frequency up to 1
MHz with Bidirectional Synchronization
• (±3%) Cycle-by-Cycle Current Limit Protection
With Hiccup Mode Support
• 150-µA Start-Up Current
• V_DD Undervoltage Lockout
• Wide Temperature Range, –40°C to 125°C
APPLICATIONS
• Phase-Shifted Full-Bridge Converters
• Industrial Power Systems
• High-Density Power Architectures
• Solar Inverters and Electric Vehicles
DESCRIPTION
The UCC28950-Q1 enhanced phase-shifted
controller builds upon Texas Instruments' industry-
standard UCCx895 phase-shifted controller family
with enhancements that offer best-in-class efficiency
in today’s high-performance power systems. The
UCC28950-Q1 implements advanced control of the
full bridge along with active control of the
synchronous-rectifier output stage.
The primary-side signals allow programmable delays
to ensure ZVS operation over wide load-current and
input-voltage ranges, while the load current naturally
tunes the secondary-side switching delays of the
synchronous rectifiers, maximizing overall system
efficiency.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011–2012, Texas Instruments Incorporated