</a>BLDC" title="BLDC">BLDC" title="BLDC">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

详情请见:
http://www.irf.com/product-info/datasheets/data/auirs20302s.pdf