MIC5020中文资料MOSFET Gate Driver with Current Sense数据手册Microchip规格书

描述 Description

The MIC5020 low-side MOSFET gate driver is designed to operate at frequencies greater than 100 kHz (5 kHz PWM for 2% to 100% duty cycle) and is an ideal choice for high-speed applications such as motor control, switch mode power supplies (SMPS), and applications using IGBTs. The MIC5020 can also operate as a circuit breaker with or without automatic retry. The MIC5020's maximum supply voltage lends itself to control applications using up to 50 V. The MIC5020 can control MOSFETs that switch voltages greater than 50 V. A rising or falling edge on the input results in a current source or sink pulse on the gate output. This output current pulse can turn on or off a 2,000 pF MOSFET in approximately 175 ns. The MIC5020 then supplies a limited current ( < 2mA), if necessary, to maintain the output state. An overcurrent comparator with a trip voltage of 50 mV makes the MIC5020 ideal for use with a current sensing MOSFET. An external low value resistor may be used instead of a sensing MOSFET for more precise overcurrent control. An optional external capacitor connected to the CT pin may be used to control the current shutdown duty cycle from 20% to < 1%. A duty cycle from 20% to about 75% is possible with an optional pull-up resistor from CT to VDD. An open collector output provides a fault indication when the sense inputs are tripped. The MIC5020 is available in 8-pin SOIC package. Other members of the MIC502x series include the MIC5021 high-side driver and the MIC5022 half-bridge driver with a cross-conduction interlock.

特性 Features

• 11 V to 50 V operation
• 175 ns rise/fall time driving 2,000 pF
• TTL compatible input with internal pull-down resistor
• Overcurrent limit
• Fault output indication
• Gate to source protection
• Compatible with current sensing MOSFETs

简介

MIC5020属于集成电路（IC）的栅极驱动器。由制造生产的MIC5020栅极驱动器栅极驱动器电源管理集成电路 (PMIC) 可用于提供隔离、放大、参考位移、自举或其他必要功能，这些功能可将来自电源转换应用中控制设备的信号连接到电源被控制通过的半导体设备（通常为 FET 或 IGBT）。任何特定设备提供的确切功能各不相同，但与它适合驱动的半导体配置相关。