Texas Instruments UCC24610

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-mm x 3-mm QFN package with PowerPad™.

Features

• Secondary-Side Controller Optimized for 5-V Systems
• Up to 600-kHz Operating Frequency
• VDS MOSFET-Sensing
• 1.6- Sink, 2.0- 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 Turn-Off Propagation Delay
• Improved Efficiency and Design Flexibility Over Traditional Diode Solution
• May Be Biased Directly From 5-V Output
• Minimal Component Count

Typical applications

• Flyback and LLC Converters
• AC/DC 5-V Adapters
• 5-V Bias Supplies
• Low Voltage Rectification Circuits

More information

• Datasheet
• IC product information