Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)

UCC28951

AKTIV

Öko-Vollbrückencontroller mit Phasenverschiebung und SR-Steuerung für einen großen Eingangsspannungs

Produktdetails

Vin (max) (V) 17 Operating temperature range (°C) -40 to 125 Control mode Current, Peak current mode, Voltage Topology Phase-shifted full bridge Rating Catalog Features Adjustable switching frequency, Current limiting, Enable/Shutdown, Error amplifier, Green mode, Light-load efficiency, Programmable slope compensation, Soft start, Soft switching, Synchronization pin, Thermal shutdown Duty cycle (max) (%) 97
Vin (max) (V) 17 Operating temperature range (°C) -40 to 125 Control mode Current, Peak current mode, Voltage Topology Phase-shifted full bridge Rating Catalog Features Adjustable switching frequency, Current limiting, Enable/Shutdown, Error amplifier, Green mode, Light-load efficiency, Programmable slope compensation, Soft start, Soft switching, Synchronization pin, Thermal shutdown Duty cycle (max) (%) 97
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4
  • Enhanced zero-voltage switching (ZVS) range
  • 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
  • VDD undervoltage lockout
  • Wide temperature range: –40°C to +125°C
  • Enhanced zero-voltage switching (ZVS) range
  • 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
  • VDD undervoltage lockout
  • Wide temperature range: –40°C to +125°C

The UCC28951 controller is an enhanced version of the UCC28950. It is a fully compatible drop-in replacement for the UCC28950. The UCC28951 uses advanced control of the full-bridge in addition to active control of the synchronous rectifier (SR) output stage.

Programmable delays ensure ZVS operation over a wide range of operating conditions, while the load current naturally tunes the switching delays of the secondary-side synchronous rectifiers(SR). This functionality maximizes overall system efficiency.

The 24-pin, TSSOP package complies with RoHS requirements.

The UCC28951 controller is an enhanced version of the UCC28950. It is a fully compatible drop-in replacement for the UCC28950. The UCC28951 uses advanced control of the full-bridge in addition to active control of the synchronous rectifier (SR) output stage.

Programmable delays ensure ZVS operation over a wide range of operating conditions, while the load current naturally tunes the switching delays of the secondary-side synchronous rectifiers(SR). This functionality maximizes overall system efficiency.

The 24-pin, TSSOP package complies with RoHS requirements.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet UCC28951 Phase-Shifted Full-Bridge Controller for Wide-Input Voltage Range Applications datasheet (Rev. A) PDF | HTML 07 Dez 2021
Application note UCC28950 600W Phase Shifted Full Bridge Design Review/Application Report (Rev. D) PDF | HTML 04 Mär 2022
Application note Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 13 Nov 2017
EVM User's guide Using the UCC27714EVM-551 for Evaluating the UCC28951-Q1 06 Okt 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

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

UCC27714EVM-551 — Evaluierungsmodul für UCC27714 600W-phasenverschobenen Vollbrückenwandler

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. 

Benutzerhandbuch: PDF
Simulationsmodell

UCC28950 and UCC28951 PSpice Transient Model (Rev. C)

SLUM169C.ZIP (168 KB) - PSpice Model
Simulationsmodell

UCC28950 and UCC28951 TINA-TI Startup Reference Design (Rev. A)

SLUM276A.TSC (738 KB) - TINA-TI Reference Design
Simulationsmodell

UCC28950 and UCC28951 TINA-TI Steady State Reference Design (Rev. A)

SLUM277A.TSC (739 KB) - TINA-TI Reference Design
Referenzdesigns

PMP8740 — Referenzdesign für industrielles AC/DC-Ladegerät mit 2 kW und 92 % Volllastwirkungsgrad

This reference design is a module that can be set as standard power supply or a battery charger. The output voltage ranges from 0 V to 32 V at a maximum current of 62.5 A. It consists of four boards, a boost PFC, a phase shift full bridge, a small daughter board (hosting the microcontroller), and (...)
Test report: PDF
Schaltplan: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
TSSOP (PW) 24 Ultra Librarian

Bestellen & Qualität

Beinhaltete Information:
  • RoHS
  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

Support und Schulungen

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