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[原创] Maxim MAX22700–2270超高CMTI隔离栅极驱动解决方案

关键词:电源管理 栅极驱动器 马达驱动 UPS MAX22700

时间:2019-12-24 11:23:20       来源:中电网

Maxim公司的MAX22700–MAX22702是具有超高共模瞬态免疫(CMTI)的单路隔离栅极驱动器,典型免疫度高达300kV/μs.器件设计用于驱动各种逆变器或马达控制应用的碳化硅(SiC)或氮化镓(GaN)晶体管.所有器件采用Maxim公司专有工艺技术集成了数字电流隔离.这些器件在不同电源域电路间传输数字信号,经受住额定电压3kVRMS 60秒.所有器件支持最低脉宽20ns,最大脉宽失真2ns.部件间传输延迟匹配,在+25℃环境温度为2ns(最大),-40℃到+125℃工作温度为5ns(最大).这种特性降低了功率晶体管死区时间,从而提高了整个效率.主要用在逆变器的隔离栅极驱动器,马达驱动器和UPS与PV逆变器.本文介绍了MAX22700–MAX2270优势和主要特性,功能框图和工作电路以及应用电路,以及评估板MAX22700–MAX22702 EVK主要特性,评估板MAX22701和MAX22702 EVK电路图,材料清单和PCB设计图.

The MAX22700–MAX22702 are a family of single-channelisolated gate drivers with ultra-high common-modetransient immunity (CMTI) of 300kV/μs (typ). The devicesare designed to drive silicon-carbide (SiC) or galliumnitride(GaN) transistors in various inverter or motorcontrol applications. All devices have integrated digitalgalvanic isolation using Maxim’s proprietary process technology.

The devices feature variants with output optionsfor gate driver common pin GNDB (MAX22700), Millerclamp (MAX22701), and adjustable undervoltage-lockoutUVLO (MAX22702). In addition, variants are offered asdifferential (D versions) or single-ended (E versions)inputs. These devices transfer digital signals betweencircuits with different power domains. All of the devic..

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