DatasheetsPDF.com

UCC28950 Dataheets PDF



Part Number UCC28950
Manufacturers Texas Instruments
Logo Texas Instruments
Description Green Phase-Shifted Full-Bridge Controller
Datasheet UCC28950 DatasheetUCC28950 Datasheet (PDF)

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC28950 SLUSA16D – MARCH 2010 – REVISED NOVEMBER 2016 UCC28950 Green Phase-Shifted Full-Bridge Controller With Synchronous Rectification 1 Features •1 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 Pr.

  UCC28950   UCC28950



Document
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC28950 SLUSA16D – MARCH 2010 – REVISED NOVEMBER 2016 UCC28950 Green Phase-Shifted Full-Bridge Controller With Synchronous Rectification 1 Features •1 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 2 Applications • Phase-Shifted Full-Bridge Converters • Datacom, Telecom, and Wireless Base-Station Power • Server, Power Supplies • Industrial Power Systems • High-Density Power Architectures • Solar Inverters, and Electric Vehicles 3 Description 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 fullbridge 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. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) UCC28950 TSSOP (24) 7.80 mm x 4.40 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. + VIN CIN - VSENSE UCC28950 Typical Application CT VBIAS CREF R1 R2 UCC28950 1 VREF GND 24 CVDD VDD RLF2 2 EA+ VDD 23 R3 R6 R4 C3 C2 ENABLE C1 R5 CSS RAB RCD 3 EA4 COMP 5 SS/EN 6 DELAB 7 DELCD REF 8 DELEF RTMIN RT 9 TMIN VREF 10 RT RSUM 11 RSUM RDCMHI VREF 12 DCM OUTA 22 .


UCC2895-Q1 UCC28950 UCC28950-Q1


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)