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IR公司的AUIRS20302S是專用于BLDC馬達驅動的三相柵極驅動器,驅動功率高達600W的BLDC馬達,工作定壓高達+200V,三個通路都有欠壓鎖住,防止交叉導通的邏輯電路,3.3V邏輯兼容,集成了電流檢測的比較器,加電復位架構,具有汽車級的質量,主要用在24V-150V三相馬達驅動,汽車和卡車HVAC和泵,BLDC馬達驅動.本文介紹了AUIRS20302S主要特性,框圖,典型應用電路以及100W 24V BLDC馬達驅動電路圖B元件布局圖. The AUIRS20302S is a three phase gate driver dedicated to BLDC motor drive up to 600W. Proprietary HVIC technology enables this rugged monolithic design with enforced Automotive ESD & Latch-up grades. Primarily designed for 24V battery application, its drive capability goes from 12v to 200V which cover all the abnormal conditions of the vehicle. The gate drive circuitry features cross-conduction preventive and minimum dead-time blocks. It is powered by a constant voltage so that the gate drives never exceed 17V including during Load Dump condition. An external MOSFET is acting as a pre-regulator. The inner charge pump and voltage control loop drives its gate in order to keep the VPR pin constant when the battery voltage varies. The AUIRS20302S also features an over-current protection that definitively shuts down all gates in case of short-circuit. The fault condition is reset by cycling the FRST pin while the I.C is disabled. A blanking time, synchronized with each high side switch command, avoids any premature triggering of the protection. The logic control block of the AUIRS20302S is developed in order to support a fast and reliable 3 phase BLDC design. For example, its inputs are compatible with the 3.3V logic processors and feature a short-pulse/noise rejection filter. The 6 commands include matched propagation delays, shoot-through protections and minimum dead-time. The bootstrap capacitor voltage of each phase is monitored independently (UVLO). Also, the maximum gate voltage is controlled by the pre-regulator in all conditions. No linear or abnormal gate drive is possible. The VPR pin can also supply the surrounding system components if the total consumption doesn’t exceed 0.1A. AUIRS20302S主要特性: 3 phase gate driver for 24V & higher drives Under-voltage lockout for all channels Cross-conduction prevention logic High voltage pre-regulator MOSFET Power-on reset architecture FAULT detection and Reset Current sense comparator Over-current blanking time 3.3V logic compatible Matched propagation delay for all channels Fully operational up to +200V Floating channels for bootstrap operation High negative transients immunity Pre-regulated supply line for uP Automotive qualified Leadfree, RoSH Compliant AUIRS20302S典型應用: 24V to 150V – 3 Phase Motor Drives Automotive & Truck HVAC, PUMP BLDC Motor Drives 
圖1.AUIRS20302S功能框圖
圖2.AUIRS20302S典型應用電路圖
圖3.100W – 24V BLDC馬達驅動電路圖
圖4.100W – 24V BLDC馬達驅動器PCB元件布局圖 詳情請見: 
auirs20302s.pdf
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