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[原创]ADI ADUM4221 4A隔离的半桥栅极驱动器解决方案

关键词:电源管理 栅极驱动器 开关电源 ADI ADUM4221 4A

时间:2020-08-17 13:58:35       来源:中电网

ADI公司的ADUM4221是4A输出隔离的半桥栅极驱动器,采用了该公司的iCoupler®技术,提供独立和隔离的高边和低边输出.它的隔离电压为5700V rms.器件组合了高速CMOS和单片变压器技术,这些隔离元件提供了比通常的脉冲变压器和栅极驱动器组合体更加优异的性能特性. ADuM4221的逻辑输入电压从2.5V到6.5V,和低压系统兼容.和采用高压绝缘方法的栅极驱动器相比, ADuM4221具有输入和输出间真正的电流隔离的优势.器件内置了重叠保护,允许死区时间可调整.死区时间引脚(DT)和GDN1引脚间的单个电阻设定了高边输出和低边输出间的次级边的死区时间. ADuM4221的峰值电流为4A(<2 Ω RDSON_x).最大传输时延为44ns,高共模瞬态免疫力为150 kV/μs, 默认低输出, 5700Vrms持续1分钟,UL认证per UL 1577.结温工作温度125C.主要应用在开关电源,隔离IGBT/MOSFET栅极驱动器,工业逆变器和氮化镓(GaN)/碳化硅(SiC)兼容器件.本文介绍了ADUM4221自举半桥应用电路,评估板EVAL-ADuM4221EBZ主要特性,电路图,材料清单和PCB设计图.

 

The ADuM4221 is a 4 A isolated, half bridge gate driver that employs the Analog Devices, Inc., iCoupler® technology to provide independent and isolated high-side and low-side outputs. The ADuM4221 provides 5700 V rms isolation in the increased creepage wide body, 16-lead SOIC_IC package. Combining high speed CMOS and monolithic transformer technology, these isolation components provide outstanding performance characteristics superior to the alternatives, such as the combination of pulse transformers and gate drivers.

The isolators operate with a logic input voltage ranging from 2.5 V t..

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