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UCC24610DR
Secondary Side Synchronous Rectifier Controller
UCC24610GATEVD VS TON GNDEN/TOFF
SYNC VCC 573 26
GATE
12V
OUT
VBULK GNDEN/TOFF VCC–
5 V
Out 3 2
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UCC24610SLUSA87C –AUGUST 2010–REVISED OCTOBER 2015
UCC24610 GREEN Rectifier™ Controller Device Features 3 DescriptionThis GREEN Rectifier™ controller is a high- Secondary-Side Controller Optimizedfor 5-V performance controller and driver for standard andSystems logic-level N-channel MOSFET power devices used• Upto 600-kHz Operating Frequency for low-voltage secondary-side synchronous VDS MOSFET-Sensing rectification. 1.6-Ω Sink, 2.0-Ω Source Gate-Drive Impedances The combinationof controller and MOSFET emulates Micro-Power Sleep Current for 90+ Designs a near-ideal diode rectifier. This solution not only
directly reduces power dissipationof the rectifier but• Automatic Light-Load Management also indirectly reduces primary-side losses as well,• Synchronous Wake-Up From Sleep and Light- dueto compoundingof efficiency gains.Load Modes
Using drain-to-source voltage sensing, the• Protection Featureson Programming Inputs UCC24610is ideal for Flyback and LLC-resonant• SYNC Input for CCM Operation power supplies but can alsobe used with other power 20-ns Typical Turnoff Propagation Delay architectures. The UCC24610is optimized for output
voltages from 4.5Vto 5.5V, andis suitable for use• Improved Efficiency and Design Flexibility Over with lower and higher output voltagesas well.Traditional Diode Solution
The UCC24610 offers a programmable false-• May Be Biased Directly From 5-V Output
triggering filter, a programmable timer to• Minimal Component Count automatically switchto light-load modeat light load,
anda SYNC input for optional usein continuous
2 Applications conduction mode (CCM) systems. Protection features TON and EN/TOFF pins prevent run-away on-time• AC-to-DC 5-V Adapters
dueto open-circuitor short-circuit fault conditions.• 5-V Bias Supplies
This deviceis availablein an 8-pin SOIC package• Low Voltage Rectification Circuits
and an 8-pin, 3.0-mm× 3.0-mm SON package with• Flyback and LLC Converters an exposed thermal pad.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Flyback Topology LLC-Resonant Half Bridge
