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

UCC28722

AKTIV

Kostengünstiger CVCC-Flyback-Controller mit primärseitiger Regelung für bipolare Netzteile

Produktdetails

Operating temperature range (°C) -40 to 125 Control mode Primary-side regulation Topology Buck, Flyback Rating Catalog Features CC/CV output regulation, Cable compensation, DCM, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start Duty cycle (max) (%) 99
Operating temperature range (°C) -40 to 125 Control mode Primary-side regulation Topology Buck, Flyback Rating Catalog Features CC/CV output regulation, Cable compensation, DCM, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start Duty cycle (max) (%) 99
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • < 50-mW No-Load Power
  • Primary-Side Regulation (PSR) Eliminates Opto-
    Coupler
  • Dynamic BJT Drive
  • ± 5% Voltage and Current Regulation Across Line
    and Load
  • 80-kHz Maximum Switching Frequency Enables
    High-Power Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for
    Highest Overall Efficiency
  • Wide VDD Range Allows Small Bias Capacitor
  • Output Overvoltage, Low-Line, and Overcurrent
    Protection Functions
  • Programmable Cable Compensation
  • SOT23-6 Package
  • < 50-mW No-Load Power
  • Primary-Side Regulation (PSR) Eliminates Opto-
    Coupler
  • Dynamic BJT Drive
  • ± 5% Voltage and Current Regulation Across Line
    and Load
  • 80-kHz Maximum Switching Frequency Enables
    High-Power Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for
    Highest Overall Efficiency
  • Wide VDD Range Allows Small Bias Capacitor
  • Output Overvoltage, Low-Line, and Overcurrent
    Protection Functions
  • Programmable Cable Compensation
  • SOT23-6 Package

The UCC28722 flyback power supply controller provides isolated-output constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. The device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.

Dynamically-controlled operating states and a tailored modulation profile support high-efficiency operation at all load levels without sacrificing output transient response.

Control algorithms in the UCC28722 device allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a bipolar transistor power switch, enabling lower-cost converter design. Discontinuous conduction mode (DCM) with valley switching reduces switching losses, while modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controller has a maximum switching frequency of 80 kHz and always maintains control of the peak-primary current in the transformer. Output overvoltage and overcurrent as well as input undervoltage protection features help keep primary and secondary component stresses in check. The UCC28722 also allows compensation for voltage drop in the cable to be programmed with an external resistor.

The UCC28722 flyback power supply controller provides isolated-output constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. The device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.

Dynamically-controlled operating states and a tailored modulation profile support high-efficiency operation at all load levels without sacrificing output transient response.

Control algorithms in the UCC28722 device allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a bipolar transistor power switch, enabling lower-cost converter design. Discontinuous conduction mode (DCM) with valley switching reduces switching losses, while modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controller has a maximum switching frequency of 80 kHz and always maintains control of the peak-primary current in the transformer. Output overvoltage and overcurrent as well as input undervoltage protection features help keep primary and secondary component stresses in check. The UCC28722 also allows compensation for voltage drop in the cable to be programmed with an external resistor.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet UCC28722 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation, BJT Drive datasheet (Rev. B) PDF | HTML 30 Okt 2015
Application note Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 31 Aug 2021
Application note Common-Mode-Chokeless Bias Supply Reference Design Example 02 Jan 2020
Application note Minimize Standby Consumption for UCC287XX Family 01 Aug 2019
Application note Selecting Electrolitic Bus Capacitor for Universal Input 17 Jul 2018
Application note Maximum Output Power and Thermal Considerations for UCC28720 and UCC28722 06 Dez 2017
Application note AC-DC Non-Isolated SMPS for Single-Phase Smart Meters Based on UCC28722 (Rev. A) 02 Nov 2017
Technical article Making smart meter eFuses robust and reliable PDF | HTML 28 Jun 2017
Technical article Powering the IoT PDF | HTML 26 Jan 2017
Application note Troubleshooting TI PSR controllers 03 Okt 2016
Technical article Solving the biggest challenges when designing smart meter power supplies PDF | HTML 06 Sep 2016
Application note UCC28722, Bias Supply Design Considerations for Intelligent eMeter Applications 05 Aug 2016
Technical article Slim down your flyback; lose that excess snubber PDF | HTML 15 Feb 2016
Application note Versatile Buck-Boost driver based on UCC28722 for 5W-9W LED Bulb 08 Dez 2015
White paper Control Challenges for Low Power AC/DC Converters 02 Okt 2015
White paper Control Challenges for Low Power AC/DC Converters (PPT) 02 Okt 2015
Technical article Designing multiple output converters with primary side sensing PDF | HTML 04 Aug 2015
Application note 5-W USB Flyback Design Example Using the UCC28722 08 Jan 2014

Design und Entwicklung

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

Evaluierungsplatine

UCC28720EVM-212 — UCC28720EVM-212 5W Evaluierungsmodul für USB-Offline-Adapter

The UCC28720EVM-212 is a 5W evaluation module for evaluating an off line adapter for USB applications. It is intended for evaluation purposes and is not intended to be an end product. The UCC28720EVM-212 converters 100V to 240V RMS input voltage down to 5V DC, with a 1A current limit for USB (...)
Benutzerhandbuch: PDF
Simulationsmodell

UCC28722 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM466A.ZIP (64 KB) - PSpice Model
Berechnungstool

SLUC528 UCC28722 MathCad Design Tool

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
AC/DC- und DC/DC-Controller (externer FET)
UCC28720 Konstantspannungs- und Konstantstromregler mit primärseitiger Regelung für bipolare Stromversorgungs UCC28722 Kostengünstiger CVCC-Flyback-Controller mit primärseitiger Regelung für bipolare Netzteile
Berechnungstool

SLUC529 UCC28722 Excel Design Tool

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
AC/DC- und DC/DC-Controller (externer FET)
UCC28720 Konstantspannungs- und Konstantstromregler mit primärseitiger Regelung für bipolare Stromversorgungs UCC28722 Kostengünstiger CVCC-Flyback-Controller mit primärseitiger Regelung für bipolare Netzteile
Referenzdesigns

PMP10236 — Referenzdesign für isolierte Flyback-Schaltung mit doppeltem Ausgang, 5 V bei 300 mA und 15 V bei 10

This is an isolated quasi-resonant flyback converter, supplying 5 V at 300 mA and 15 V at 100 mA; both outputs are isolated from each other. The UCC28722 has been chosen to drive a low-cost high-voltage BJT transistor.
Test report: PDF
Schaltplan: PDF
Referenzdesigns

PMP10397 — Referenzdesign, extrem großer Eingangsspannungsbereich, Dual-Ausgang, AC/DC-Bias-Versorgung mit P

Dieses Design verwendet den kostengünstigen primärseitigen Regelungs (PSR)-IC UCC28722 mit einem Bipolartransistor für Anwendungen mit extrem breitem Eingangsbereich (85 V/AC bis 528 V/AC). Es werden zwei Ausgänge mit getrennten Massewerten erzeugt, 5 V/0,3 A und 16,5 V/0,1 A.
Test report: PDF
Schaltplan: PDF
Referenzdesigns

PMP30281 — Referenzdesign für Flyback-Schaltung mit mehreren Ausgängen, 85 VAC–480 VAC-Eingang

This offline flyback reference design uses the UCC28722 controller to generate 2 isolated outputs (5 V at 400 mA, 24 V at 300 mA) from an AC input (85 VAC - 480 VAC). The UCC28722 output drive interfaces to a bipolar transistor power switch, enabling a more efficient design than a typical design. (...)
Test report: PDF
Schaltplan: PDF
Referenzdesigns

PMP7668 — Referenzdesign für eine Vorspannungsversorgung mit breitem Eingangsspannungsbereich und 2 W

Dieses Referenzdesign ist eine Vorspannungsversorgung mit 2 W für Anwendungen, die über einen großen Eingangsbereich (110 – 500 VAC) betrieben werden müssen. Das platzsparende Design (69 mm x 26 mm) und der hohe Wirkungsgrad machen dieses Design zur perfekten Lösung für e-Metering-Anwendungen. Die (...)
Test report: PDF
Schaltplan: PDF
Referenzdesigns

PMP11062 — Referenzdesign für universellen Gleichspannungseingang, 380 V/1 kW, mit Leistungsfaktorregelung (CCM

The PMP11062 reference design uses the UCC28180 CCM PFC controller to generate a 380V/1kW output from a universal AC input. In addition to that, the UCC28722  PSR controller is used as bias supply in this design. Over 96% peak efficiency is achieved at  120VAC/60Hz input and over 98% (...)
Test report: PDF
Schaltplan: PDF
Referenzdesigns

PMP11211 — Referenzdesign für universellen Gleichspannungseingang, 200 kHz, 380 V, 1 kW, mit Leistungsfaktorreg

The PMP11211 reference design uses the UCC28180 CCM PFC controller to generate a 380V/1kW output from a universal AC input. In addition to that, the UCC28722  PSR controller is used as bias supply in this design. Over 94% peak efficiency is achieved at  120VAC/60Hz input and over 97% (...)
Test report: PDF
Schaltplan: PDF
Referenzdesigns

PMP12074 — Referenzdesign für 230-V-Gleichspannungseingang, 200 kHz, 380 V, 1 kW, mit Leistungsfaktorregelung (

The PMP12074 reference design uses the UCC28180 CCM PFC controller to generate a 380V/1kW output from a 230VAC input. In addition to that, the UCC28722  PSR controller is used as bias supply in this design. Over 97% efficiency is achieved at 230VAC/50Hz input with fixed 200kHz switching (...)
Test report: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00583 — 5 V/1,6 A und 12 V/10 mA, AC/DC-Flyback-PSU für E-Meter-Anwendungen, optimiert für niedrigen AC-Leit

The TIDA-00583 is a Flyback converter which can operate in very low AC line input (Minimum 45Vac) and provide a regulated, fully-isolated 5V@1.6A output for communication model of E-meter, as well as another low-power 12V non-isolated output. Featuring TIs UCC28722 PSR controller which provides (...)
Test report: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00628 — Referenzdesign eines snubberlosen, nicht isolierten AC/DC-Flyback-Wandlers mit vereinfachtem Transfo

TIDA-00628 is a 15V/6.5W non-isolated, single output, AC/DC Flyback power supply that is capable of operating from wide input voltage ranging from 85Vac to 440Vac. This design demonstrates 2 key features (1) the elimination of snubber components enabled by use of a high-voltage bipolar transistor (...)
Design guide: PDF
Schaltplan: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
SOT-23 (DBV) 6 Ultra Librarian

Bestellen & Qualität

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

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