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IR公司的IRS2795(1,2)是LLC諧振半橋轉(zhuǎn)換器控制集成電路,最高工作頻率500kHz,可編程最低和最高開關(guān)頻率,可編程軟起動頻率和時間以及死區(qū)時間,微功耗起動和超低靜態(tài)電流,具有多種保護電路,用不著在LCD和PDP TV,通信和PC開關(guān)電源以及家庭音響系統(tǒng).本文介紹了IRS2795(1,2)主要特性,方框圖, 典型應(yīng)用電路圖以及IRS27951 240W評估板主要指標,電路圖和材料清單與PCB布局圖. 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)典型應(yīng)用: LCD & PDP TV Telecom SMPS, PC SMPS Home Audio Systems 
圖1.IRS2795(1,2)方框圖
圖2.IRS2795(1,2)典型應(yīng)用電路圖 IRS27951評估板 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.
圖3.IRS27951評估板外形圖 IRS27951評估板主要指標:
圖4.IRS27951評估板電路圖 IRS27951評估板材料清單:
圖5.IRS27951評估板用變壓器電路圖
圖6.IRS27951評估板PCB布局圖:上,頂層;下:底層 詳情請見: 
irs27951s[1].pdf
(426.36 KB)
irac27951sr-240w[1].pdf
(889.63 KB)
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