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AC/DC & DC/DC controllers (external FET)
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AC/DC & DC/DC controllers (external FET)

UCC24610

ACTIVE

Secondary side synchronous rectifier controller

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Data sheet

UCC24610

ACTIVE
Data sheet Order now

Product details

Operating temperature range (°C) -40 to 125 Control mode VDS sensing Topology Active-clamp flyback, Active-clamp forward, CCM, DCM, Forward, Full bridge, Half bridge, LLC, Quasi resonant Rating Catalog Features 600kHz operation, Automatic Light Load Management, Compatible with CCM, Synchronous Rectifier, VDS Sensing
Operating temperature range (°C) -40 to 125 Control mode VDS sensing Topology Active-clamp flyback, Active-clamp forward, CCM, DCM, Forward, Full bridge, Half bridge, LLC, Quasi resonant Rating Catalog Features 600kHz operation, Automatic Light Load Management, Compatible with CCM, Synchronous Rectifier, VDS Sensing
SOIC (D) 8 29.4 mm² 4.9 x 6 VSON (DRB) 8 9 mm² 3 x 3
  • Secondary-Side Controller Optimized for 5-V Systems
  • Up to 600-kHz Operating Frequency
  • VDS MOSFET-Sensing
  • 1.6-Ω Sink, 2.0-Ω Source Gate-Drive Impedances
  • Micro-Power Sleep Current for 90+ Designs
  • Automatic Light-Load Management
  • Synchronous Wake-Up From Sleep and Light-Load Modes
  • Protection Features on Programming Inputs
  • SYNC Input for CCM Operation
  • 20-ns Typical Turnoff Propagation Delay
  • Improved Efficiency and Design Flexibility Over Traditional Diode Solution
  • May Be Biased Directly From 5-V Output
  • Minimal Component Count
  • APPLICATIONS
    • AC-to-DC 5-V Adapters
    • 5-V Bias Supplies
    • Low Voltage Rectification Circuits
    • Flyback and LLC Converters
    •
  • Secondary-Side Controller Optimized for 5-V Systems
  • Up to 600-kHz Operating Frequency
  • VDS MOSFET-Sensing
  • 1.6-Ω Sink, 2.0-Ω Source Gate-Drive Impedances
  • Micro-Power Sleep Current for 90+ Designs
  • Automatic Light-Load Management
  • Synchronous Wake-Up From Sleep and Light-Load Modes
  • Protection Features on Programming Inputs
  • SYNC Input for CCM Operation
  • 20-ns Typical Turnoff Propagation Delay
  • Improved Efficiency and Design Flexibility Over Traditional Diode Solution
  • May Be Biased Directly From 5-V Output
  • Minimal Component Count
  • APPLICATIONS
    • AC-to-DC 5-V Adapters
    • 5-V Bias Supplies
    • Low Voltage Rectification Circuits
    • Flyback and LLC Converters
    •

    This GREEN Rectifier controller is a high-performance controller and driver for standard and logic-level N-channel MOSFET power devices used for low-voltage secondary-side synchronous rectification.

    The combination of controller and MOSFET emulates a near-ideal diode rectifier. This solution not only directly reduces power dissipation of the rectifier but also indirectly reduces primary-side losses as well, due to compounding of efficiency gains.

    Using drain-to-source voltage sensing, the UCC24610 is ideal for Flyback and LLC-resonant power supplies but can also be used with other power architectures. The UCC24610 is optimized for output voltages from 4.5 V to 5.5 V, and is suitable for use with lower and higher output voltages as well.

    The UCC24610 offers a programmable false-triggering filter, a programmable timer to automatically switch to light-load mode at light load, and a SYNC input for optional use in continuous conduction mode (CCM) systems. Protection features on TON and EN/TOFF pins prevent run-away on-time due to open-circuit or short-circuit fault conditions.

    This device is available in an 8-pin SOIC package and an 8-pin, 3.0-mm × 3.0-mm SON package with an exposed thermal pad.

    This GREEN Rectifier controller is a high-performance controller and driver for standard and logic-level N-channel MOSFET power devices used for low-voltage secondary-side synchronous rectification.

    The combination of controller and MOSFET emulates a near-ideal diode rectifier. This solution not only directly reduces power dissipation of the rectifier but also indirectly reduces primary-side losses as well, due to compounding of efficiency gains.

    Using drain-to-source voltage sensing, the UCC24610 is ideal for Flyback and LLC-resonant power supplies but can also be used with other power architectures. The UCC24610 is optimized for output voltages from 4.5 V to 5.5 V, and is suitable for use with lower and higher output voltages as well.

    The UCC24610 offers a programmable false-triggering filter, a programmable timer to automatically switch to light-load mode at light load, and a SYNC input for optional use in continuous conduction mode (CCM) systems. Protection features on TON and EN/TOFF pins prevent run-away on-time due to open-circuit or short-circuit fault conditions.

    This device is available in an 8-pin SOIC package and an 8-pin, 3.0-mm × 3.0-mm SON package with an exposed thermal pad.
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    Technical documentation

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    Type Title Date
    * Data sheet UCC24610 GREEN Rectifier™ Controller Device datasheet (Rev. C) PDF | HTML 12 Aug 2015
    More literature PCB layout guidelines to optimize power supply performance 23 Mar 2021
    Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
    Application note UCC24610 and UCC24612 SR Range Extension Guide 18 Dec 2017
    Technical article USB Wall Chargers: Conveniences and Challenges PDF | HTML 06 Oct 2015
    EVM User's guide Using the UCC28730EVM-552 10-W Adaptor Module With PSR and Wake-Up Monitor 06 Feb 2015
    Application note A High Efficiency Synchronous Rectifier Flyback for High Density AC/DC Adapter 03 Jun 2011
    User guide A 90-W High-Efficiency, LLC Series-Resonant Converter 03 Nov 2010
    User guide Using the UCC24610EVM-693 03 Sep 2010
    EVM User's guide Using the UCC24610EVM-563 01 Jul 2010

    Design & development

    For additional terms or required resources, click any title below to view the detail page where available.

    Evaluation board

    UCC24610EVM-563 — Evaluation Module for UCC24610 Secondary Side Synchronous Rectifier Controller

    The UCC24610EVM-563 is a 25W, 5V off-line DCM Flyback converter with secondary side synchronous rectification controlled by the UCC24610. The primary side control is provided by the UCC28610 Green-Mode Flyback Controller.
    User guide: PDF
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    Daughter card

    UCC24610EVM-693 — Diode Replacement Demonstration Card for UCC24610 Secondary Side Synchronous Rectifier Controller

    The UCC24610EVM-693 is a diode replacement demonstration card that is used as a substitute for the Schottky diode in an existing customer system. This daughter card consists of the UCC24610 controller, a FET suitable for 5V, 10W output converters, and support components. The UCC24610EVM-693 can (...)
    User guide: PDF
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    Calculation tool

    SLUC348 — UCC24610 Design Calculation Tool

    Supported products & hardware

    Supported products & hardware

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    AC/DC & DC/DC controllers (external FET)
    UCC24610 — Secondary side synchronous rectifier controller
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