UCC28950
Green phase-shifted full-bridge controller with Synchronous Rectification control
UCC28950
- 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 and Off Control with Programmable Threshold
- Programmable Adaptive Delay
- Average or Peak Current Mode Control With Programmable Slope Compensation and Voltage Mode Control
- Naturally Handles Pre-Biased Start Up With DCM Mode
- Closed Loop Soft Start and Enable Function
- Programmable Switching Frequency up to 1 MHz with Bi-Directional Synchronization
- (±3%) Cycle-by-Cycle Current Limit Protection With Hiccup Mode Support
- 150-µA Start-Up Current
- VDD Undervoltage Lockout
- Wide Temperature Range –40°C to +125°C
The UCC28950 enhanced phase-shifted controller builds upon Texas Instrument’s industry standard UCx895 phase-shifted controller family with enhancements that offer best in class efficiency in today’s high performance power systems. The UCC28950 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 range, while the load current naturally tunes the secondary-side synchronous rectifiers switching delays, maximizing overall system efficiency.
The UCC28950 also offers multiple light-load management features including burst mode and dynamic SR on/off control when transitioning in and out of Discontinuous Current Mode (DCM) operation, ensuring ZVS operation is extended down to much lighter loads.
In addition, the UCC28950 includes support for current or voltage mode control. Programmable switching frequency up to 1 MHz and a wide set of protection features including cycle-by-cycle current limit, UVLO and thermal shutdown. A 90-degree phase-shifted interleaved synchronized operation can be easily arranged between two converters.
The UCC28950 is available in TSSOP-24 package.
For all available packages, see the orderable addendum at the end of the datasheet.Similar products you might be interested in
Drop-in replacement with upgraded functionality to the compared device
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | UCC28950 Green Phase-Shifted Full-Bridge Controller With Synchronous Rectification datasheet (Rev. D) | PDF | HTML | 04 Nov 2016 |
Application note | UCC28950 600W Phase Shifted Full Bridge Design Review/Application Report (Rev. D) | PDF | HTML | 04 Mar 2022 | |
Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
Application note | Gate Driver Design Considerations | 10 Oct 2016 | ||
Technical article | Staying cool, efficiently | PDF | HTML | 22 Aug 2016 | |
More literature | Design review of a 2-kW parallelable power supply module | 17 Aug 2016 | ||
More literature | Design review of a 2-kW parallelable power supply module (PPT) | 17 Aug 2016 | ||
EVM User's guide | Using the UCC27714EVM-551 (Rev. A) | 14 Sep 2015 | ||
White paper | Advancing Power Supply Solutions Through the Promise of GaN | 24 Feb 2015 | ||
More literature | Design Review of a Full-Featured 350-W Offline Power Converter | 29 Oct 2013 | ||
Application note | Frequency Dithering With the UCC28950 and TLV3201 | 09 May 2012 | ||
Application note | Synchronizing Three or More UCC28950 Phase-Shifted, Full-Bridge Controllers | 13 Sep 2011 | ||
Application note | Pre-biased Output Voltage Startup Operation of the UCC28950 | 01 Aug 2011 | ||
More literature | Журнал по применению аналоговых компонентов 3кв. 2010 | 13 Jan 2011 | ||
Analog Design Journal | 3Q 2010 Issue Analog Applications Journal | 11 Aug 2010 | ||
Analog Design Journal | Computing power going “Platinum” | 11 Aug 2010 | ||
EVM User's guide | 600-W, Phase-Shifted, Full-Bridge Converter (Rev. A) | 19 May 2010 | ||
More literature | Seminar 800 Topic 5 - Fixed-Frequency Resonant-Switched PWM | 15 Feb 2001 | ||
More literature | Seminar 900 Topic 3 - Designing a Phase-Shifted ZVT Power Converter | 15 Feb 2001 | ||
More literature | Seminar 900 Topic 4 - 500-W 40-W/in3 Phase-Shifted ZVT Power Converter | 15 Feb 2001 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
UCC27714EVM-551 — UCC27714 600W Phase Shifted Full Bridge Converter Evaluation Module
This 600W EVM was designed to demonstrate how the UCC28950 control IC, UCC27524A and UCC27714 gate drivers could be used in a phase shifted full bridge converter that achieves ZVS from 50 to 100% load.
UCC28950 and UCC28951 PSpice Transient Model (Rev. C)
UCC28950 and UCC28951 TINA-TI Startup Reference Design (Rev. A)
UCC28950 and UCC28951 TINA-TI Steady State Reference Design (Rev. A)
SLUC210 — UCC28950 MathCAD Design Tool
Supported products & hardware
Products
AC/DC & DC/DC controllers (external FET)
SLUC222 — UCC28950 Excel Design Tool
Supported products & hardware
Products
AC/DC & DC/DC controllers (external FET)
Hardware development
Evaluation board
HPA442B Gerber Files
UCC28950 HPA471 Gerbers
PMP7246 — 36-60Vin, 350W Slow Drain Modulation Power Converter with PSFB ZTE and HSHB Reference Design
PMP8606 — 300W Full Bridge Phase Shifted (FBPS) DC/DC Power Supply Reference Design
PMP6712 — Dual-channel full-bridge converter reference design (54 V @ 30 A) for PoE power sourcing (PSE)
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
TSSOP (PW) | 24 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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