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UCG28826

VORSCHAU

Selbstvorspannender Hochfrequenz-QR-Flyback-Wandler mit integriertem GaN (65 W)

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Produktdetails

Rating Catalog Operating temperature range (°C) -40 to 105 Topology Flyback Type Converter (Integrated Switch) Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Over Current Protection, Over Temperature Protection, Over Voltage Protection, Self-bias, Short circuit protection, USB C/PD compatible, Under Voltage Protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switch current limit (typ) (A) 3.5
Rating Catalog Operating temperature range (°C) -40 to 105 Topology Flyback Type Converter (Integrated Switch) Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Over Current Protection, Over Temperature Protection, Over Voltage Protection, Self-bias, Short circuit protection, USB C/PD compatible, Under Voltage Protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switch current limit (typ) (A) 3.5
VQFN (REZ) 12 25 mm² 5 x 5
  • Integrated 700V GaN with 170mΩ Rds(on)
  • Dynamic QR/DCM/CCM modes of operation
  • Support up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input/output voltage sensing
    • Integrated current sense
    • Integrated HV startup
    • Integrated X-cap discharge
  • High efficiency and low EMI performance
    • Ultra-low standby power: <30mW
    • Frequency foldback and burst mode
    • Valley locking
    • Frequency dithering
    • Switching slew rate control
  • Comprehensive protection features
    • Over Temperature Protection
    • Over Voltage Protection
    • Short Circuit Protection
    • Cycle-by-cycle current limit
    • Two-Level Over Power Protection with LPS
    • Brown-in/out Protection
    • Open feedback protection
  • Flexible configurability via external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Max/min peak current ratio
    • Dithering amplitude
  • Integrated 700V GaN with 170mΩ Rds(on)
  • Dynamic QR/DCM/CCM modes of operation
  • Support up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input/output voltage sensing
    • Integrated current sense
    • Integrated HV startup
    • Integrated X-cap discharge
  • High efficiency and low EMI performance
    • Ultra-low standby power: <30mW
    • Frequency foldback and burst mode
    • Valley locking
    • Frequency dithering
    • Switching slew rate control
  • Comprehensive protection features
    • Over Temperature Protection
    • Over Voltage Protection
    • Short Circuit Protection
    • Cycle-by-cycle current limit
    • Two-Level Over Power Protection with LPS
    • Brown-in/out Protection
    • Open feedback protection
  • Flexible configurability via external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Max/min peak current ratio
    • Dithering amplitude

UCG28826 is a high frequency, quasi-resonant flyback converter with built-in 170mΩ GaN high electron mobility transistor (HEMT) to convert AC to DC for up to 65W power converters. It is best suited for high power density applications such as cell phone fast chargers and laptop adapters. The key feature of this device is the self-bias and auxless sensing scheme which completely eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

This device also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG28826 includes a full list of protections such as brown-in/out protection, SCP, OVP, OLP, OFB and OTP. The cycle-by-cycle current limit ensures fast response to the fault conditions to safeguard the system and improve the reliability. The Input feedforward and output voltage based OLP correction are implemented to meet LPS requirements. Furthermore, the UCG28826 has dedicated configuration pins to offer more flexibility. Only resistors are needed to tune certain parameters for each system, enabling a platform design with a single device.

UCG28826 is a high frequency, quasi-resonant flyback converter with built-in 170mΩ GaN high electron mobility transistor (HEMT) to convert AC to DC for up to 65W power converters. It is best suited for high power density applications such as cell phone fast chargers and laptop adapters. The key feature of this device is the self-bias and auxless sensing scheme which completely eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

This device also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG28826 includes a full list of protections such as brown-in/out protection, SCP, OVP, OLP, OFB and OTP. The cycle-by-cycle current limit ensures fast response to the fault conditions to safeguard the system and improve the reliability. The Input feedforward and output voltage based OLP correction are implemented to meet LPS requirements. Furthermore, the UCG28826 has dedicated configuration pins to offer more flexibility. Only resistors are needed to tune certain parameters for each system, enabling a platform design with a single device.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet UCG28826 Self-biased High Frequency QR Flyback Converter with Integrated GaN datasheet PDF | HTML 12 Sep 2023
Technical article How an auxless GaN flyback converter can solve AC/DC adapter design challenges (Rev. A) PDF | HTML 11 Feb 2025
EVM User's guide Using the UCG28826EVM-093 65W USB-C PD High-Density GaN Integrated Quasi-Resonant Flyback Converter (Rev. A) PDF | HTML 04 Feb 2025

Design und Entwicklung

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

Evaluierungsplatine

UCG28826EVM-093 — UCG28826-Evaluierungsmodul

Das UCG28826EVM-093 ist ein 65 W USB-C® PD-Evaluierungsmodul (EVM) zur Evaluierung eines integrierten quasiresonanten Offline-Flyback-Adapters mit GaN für AC/DC-Adapter, Ladegeräte, USB-Wandsteckdosen und andere Anwendungen. Das EVM erfüllt die Anforderungen an Effizienz von CoC Tier 2 und DoE (...)

Benutzerhandbuch: PDF | HTML
Referenzdesigns

PMP41145 — Referenzdesign für universellen 65 W, 20 V 3,25 A-Flyback mit integriertem GaN-Eingang

Bei diesem Referenzdesign handelt es sich um ein AC/DC-Stromversorgungsdesign mit fester Ausgangsspannung von 65 W und 20 V mit integriertem Flyback und Galliumnitrid (GaN). Dieses Design kann 65 W volle Nennleistung über 90 VAC bis 264 VAC liefern und einen Wirkungsgrad von 93 % bei 90 VAC (...)
Test report: PDF
Referenzdesigns

PMP41117 — Referenzdesign für USB-PD-Ladegerät mit universellem AC-Eingang, 65 W Dual-USB Type-C®-Anschluss und

Bei diesem Referenzdesign handelt es sich um ein Referenzdesign für ein Ladegerät mit 65 W USB Type-C®-Anschlüssen und USB Power Delivery (PD) mit integriertem Flyback-Controller und Galliumnitrid (GaN)-Leistungsschalter. Dieses Design kann eine Nennleistung von 65 W über 90 VAC bis 264 VAC liefern (...)
Test report: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
VQFN (REZ) 12 Ultra Librarian

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