原标题：IR AUIRS20302S三相600W BLDC马达驱动方案

　　IR公司的AUIRS20302S是专用于BLDC马达驱动的三相栅极驱动器, 驱动功率高达600W的BLDC马达,工作定压高达+200V,三个通路都有欠压锁住,防止交叉导通的逻辑电路,3.3V逻辑兼容,集成了电流检测的比较器,加电复位架构,具有汽车级的质量,主要用在24V-150V三相马达驱动,汽车和卡车HVAC和泵,BLDC马达驱动.本文介绍了 AUIRS20302S主要特性,框图,典型应用电路以及100W 24V BLDC马达驱动电路图B元件布局图.

　　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典型应用:

　　24V to 150V – 3 Phase Motor Drives

　　Automotive & Truck HVAC, PUMP

　　BLDC Motor Drives

　　图1.AUIRS20302S功能框图

　　图2.AUIRS20302S典型应用电路图

　　图3.100W – 24V BLDC马达驱动电路图

　　图4.100W – 24V BLDC马达驱动器PCB元件布局图