UCC24610 Texas instruments

UCC24610

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UCC24610

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Описание

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.

Secondary-Side Controller Optimized for 5-V Systems

Up to 600-kHz Operating Frequency

V_DS 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

Topology	Active-clamp flyback, Active-clamp forward, CCM, DCM, Forward, Full bridge, Half bridge, LLC, Quasi resonant
UVLO thresholds on/off (V)	4.4/4.2
Switching frequency (max) (kHz)	600
Features	600kHz operation, Automatic Light Load Management, SYNC pin for CCM, Synchronous Rectifier, VDS Sensing
Operating temperature range (°C)	-40 to 125
Control mode	VDS sensing
Device type	Controllers
Rating	Catalog