UCC24610 Secondary Side Synchronous Rectifier Controller | TI.com

UCC24610
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Secondary Side Synchronous Rectifier Controller

 

Description

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.

Features

  • 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
  • Parametrics

    Compare all products in Synchronous rectifier (SR) controllers Email Download to Excel
    Part number Order Frequency (Max) (kHz) UVLO thresholds on/off (V) Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
    UCC24610 Order now 600     4.4/4.2     SYNC pin for CCM     -40 to 125     SOIC | 8
    SON | 8    
    8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
    8SON: 9 mm2: 3 x 3 (SON | 8)    
    UCC24612 Order now 1000     4.5/4       -40 to 125     SOT-23 | 5     5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)    
    UCC24624 Order now 700     4.5/4       -40 to 125     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
    UCC24630 Order now 200     4/3.6     Compatible with CCM     -40 to 125     SOT-23 | 6     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
    UCC24636 Order now 130     4/3.6     USB Type-C Compatible     -40 to 125     SOT-23 | 6     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)