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| IR IRS2795(1,2) 240W电源解决方案 | |||||
作者:IR 文章来源:IR 点击数: 更新时间:2012-1-31 ![]() |
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The IRS2795(1,2) is a self oscillating half-bridge driver IC for DC-DC resonant converter applications, especially the LLC resonant half-bridge converter. The frequency and dead time can be programmed externally using two external components. The IC offers over current protection using the on state resistance of the low-side MOSFET. The IC can be disabled by externally pulling the voltage at the CT/SD pin below its enable voltage threshold. IRS2795(1,2)主要特性: Simple primary-side control solution for fixed and variable frequency DC-DC resonant converters. Max 500kHz per channel output with 50% duty cycle Floating channel bootstrap operation up to +600Vdc Programmable minimum and maximum switching frequency Programmable soft start frequency and soft start time Programmable dead time Micropower start-up & ultra low quiescent current Over-current protection using low side MOSFET Rds(on) User initiated micropower “Sleep mode” Under-voltage Lockout Simple design with minimal component count. Lead-free IRS2795(1,2)典型应用: LCD & PDP TV Telecom SMPS, PC SMPS Home Audio Systems ![]() 图1.IRS2795(1,2)方框图 ![]() 图2.IRS2795(1,2)典型应用电路图 IRS27951评估板 This document details the test procedure for validation of IRAC27951SR-240W Evaluation Board, featuring the IRS27951 Resonant Half Bridge controller and the IR11682 dual-channel synchronous rectification controller. The document includes schematic diagram, test setup, test procedure, and test results. ![]() 图3.IRS27951评估板外形图 IRS27951评估板主要指标: ![]() ![]() 图4.IRS27951评估板电路图 IRS27951评估板材料清单: ![]() ![]() 图5.IRS27951评估板用变压器电路图 ![]() ![]() 图6.IRS27951评估板PCB布局图:上,顶层;下:底层 详情请见: http://www.irf.com/product-info/datasheets/data/irs27951s.pdf 和 http://www.irf.com/technical-info/refdesigns/irac27951sr-240w.pdf |
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