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

UCC24612

AKTIV

Synchroner Synchrongleichrichter-Controller für Hochfrequenz-Multimode-Betrieb

Produktdetails

Rating Catalog Topology Active-clamp flyback, Active-clamp forward, CCM, DCM, Forward, Full bridge, Half bridge, LLC, Quasi resonant Control mode VDS sensing Features 1 MHz operation, 800 kHz operation, Adaptive Minimum Off-time, Automatic light load and sleep mode, High or low-side configurable, Operation up to 1Mhz, Proportional gate drive, Synchronous Rectifier, USB C/PD compatible Operating temperature range (°C) -40 to 125
Rating Catalog Topology Active-clamp flyback, Active-clamp forward, CCM, DCM, Forward, Full bridge, Half bridge, LLC, Quasi resonant Control mode VDS sensing Features 1 MHz operation, 800 kHz operation, Adaptive Minimum Off-time, Automatic light load and sleep mode, High or low-side configurable, Operation up to 1Mhz, Proportional gate drive, Synchronous Rectifier, USB C/PD compatible Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Supports Topologies such as Active Clamp Flyback, QR, DCM, CCM Flyback and LLC
  • MOSFET VDS Sensing up to 230 V
  • Operating Frequency Up to 1 MHz
    • 1 MHz for UCC24612-1
    • 800 kHz for UCC24612-2
  • Wide VDD Range Allows for Direct Bias from 5-V to 28-V Output Systems
  • 4-A Sink, 1-A Source Gate Driver with Proportional Gate Drive
  • Adaptive Minimum Off-time for Increased Noise Immunity
  • Cycle Limit Pre-Turn-off Improves Efficiency in CCM
  • High or Low-Side Configurable
  • Automatic Light-Load and Sleep-Mode Management with 320-µA standby current
  • 16-ns Typical Turnoff Propagation Delay
  • 9.5-V Gate Drive Clamp for Reduced Driving Loss
  • Supports Topologies such as Active Clamp Flyback, QR, DCM, CCM Flyback and LLC
  • MOSFET VDS Sensing up to 230 V
  • Operating Frequency Up to 1 MHz
    • 1 MHz for UCC24612-1
    • 800 kHz for UCC24612-2
  • Wide VDD Range Allows for Direct Bias from 5-V to 28-V Output Systems
  • 4-A Sink, 1-A Source Gate Driver with Proportional Gate Drive
  • Adaptive Minimum Off-time for Increased Noise Immunity
  • Cycle Limit Pre-Turn-off Improves Efficiency in CCM
  • High or Low-Side Configurable
  • Automatic Light-Load and Sleep-Mode Management with 320-µA standby current
  • 16-ns Typical Turnoff Propagation Delay
  • 9.5-V Gate Drive Clamp for Reduced Driving Loss

UCC24612 is a high performance synchronous rectifier controller and driver for standard and logic-level N-channel MOSFET power devices. By implementing a near-ideal diode emulation UCC24612 reduces losses of the output rectifier and indirectly the primary side losses. The drain to source (VDS) sensing control scheme allows UCC24612 to work with multiple topologies, such as Active Clamp Flyback, QR/DCM/CCM Flyback and LLC, et.

Integrated features simplify the design effort, enabling UCC24612 to excel in a variety of applications and frequencies. The wide operating VDD and VD voltage ranges enable simple implementation in systems with outputs up to 28 V. Efficiency and noise immunity is enhanced with adaptive minimum off-time. Variants UCC24612-1 and UCC24612-2 offer different minimum on-times to provide additional noise immunity. Robust operation in continuous conduction mode (CCM) is further enhanced with proportional gate-drive and CCM cycle limit pre-turn-off.

UCC24612 has multiple features that improve efficiency. The fast comparator with short propagation delays reduces switching loss. The 9.5-V gate drive clamp reduces MOSFET driving losses. Frequency dependent standby modes further decreases standby power. These features help UCC24612 be part of a greater system that meets stringent efficiency standards such as Department of Energy (DoE) Level VI and Code of Conduct (CoC) Tier 2.

UCC24612 is available in a SOT23-5 package.

UCC24612 is a high performance synchronous rectifier controller and driver for standard and logic-level N-channel MOSFET power devices. By implementing a near-ideal diode emulation UCC24612 reduces losses of the output rectifier and indirectly the primary side losses. The drain to source (VDS) sensing control scheme allows UCC24612 to work with multiple topologies, such as Active Clamp Flyback, QR/DCM/CCM Flyback and LLC, et.

Integrated features simplify the design effort, enabling UCC24612 to excel in a variety of applications and frequencies. The wide operating VDD and VD voltage ranges enable simple implementation in systems with outputs up to 28 V. Efficiency and noise immunity is enhanced with adaptive minimum off-time. Variants UCC24612-1 and UCC24612-2 offer different minimum on-times to provide additional noise immunity. Robust operation in continuous conduction mode (CCM) is further enhanced with proportional gate-drive and CCM cycle limit pre-turn-off.

UCC24612 has multiple features that improve efficiency. The fast comparator with short propagation delays reduces switching loss. The 9.5-V gate drive clamp reduces MOSFET driving losses. Frequency dependent standby modes further decreases standby power. These features help UCC24612 be part of a greater system that meets stringent efficiency standards such as Department of Energy (DoE) Level VI and Code of Conduct (CoC) Tier 2.

UCC24612 is available in a SOT23-5 package.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet UCC24612 High Frequency Synchronous Rectifier Controller datasheet (Rev. A) PDF | HTML 13 Feb 2018
Technical article High-frequency resonant converter design considerations, Part 2 PDF | HTML 21 Dez 2023
More literature PCB layout guidelines to optimize power supply performance 23 Mär 2021
Technical article Gain ultra-high power density for 100-W USB Power Delivery adapters PDF | HTML 05 Mär 2019
Technical article How topology selection can help improve reliability in industrial AC/DC power supp PDF | HTML 14 Feb 2019
Technical article Intelligently control an active clamp flyback PDF | HTML 01 Mär 2018
Application note UCC24610 and UCC24612 SR Range Extension Guide 18 Dez 2017

Design und Entwicklung

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Evaluierungsplatine

UCC28780EVM-002 — UCC28780 Aktiv-Clamp-Sperrregler, 45 W AC/DC-EVM mit GaN-FET

Das UCC28780EVM-002 demonstriert einen hohen Wirkungsgrad und hoher Dichte für einen 45-W-Offline-Adapter unter Verwendung des UCC28780-Flyback-Controllers mit aktiver Klemme bei hoher Frequenz nominal 300 kHz unter Verwendung von GaN-MOSFET-Leistungs-ICs, NV6115 und NV6117.  Das EVM verwendet (...)

Benutzerhandbuch: PDF
Evaluierungsplatine

UCC28780EVM-021 — UCC28780 EVM für Active-Clamp-Flyback-Wandler, 45 W mit UCC24612 und Si-MOSFET

Das UCC28780EVM-021 ist ein 45-W-Evaluierungsmodul (EVM) zur Evaluierung eines Offline-Flyback-Adapters mit aktiver Klemme zum Laden von Notebooks und anderen Anwendungen. Das EVM erfüllt die Anforderungen an Effizienz von CoC Tier 2 und DoE Level 6. Es ist für Evaluierungszwecke und nicht als (...)

Benutzerhandbuch: PDF
Tochterkarte

UCC24612-1EVM — Demoplatine für sekundärseitigen Synchron-Gleichrichter-Controller-Dioden-Austausch

Das Evaluierungsmodul (EVM) UCC24612-1EVM dient zur Umwandlung des Ausgangsgleichrichters eines Flyback-Wandlers von einer Diode in einen Synchrongleichrichter (Synchronous Rectifier, SR)-FET, um die Effizienzvorteile der Verwendung eines SR gegenüber einer Gleichrichterdiode zu untersuchen und zu (...)
Benutzerhandbuch: PDF
Simulationsmodell

UCC24612 SIMPLIS Model (Rev. A)

SLUM597A.ZIP (491 KB) - SIMPLIS Model

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