麒麟電子
標(biāo)題: 基于UCC24610 型號(hào)的二次側(cè)同步整流器控制器 [打印本頁]
作者: 拍明芯城 時(shí)間: 2018-8-29 17:15
標(biāo)題: 基于UCC24610 型號(hào)的二次側(cè)同步整流器控制器
描述
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.
特性
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
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