MIC4420BN

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Introduction

The MIC4420BN is a dual gate driver. It is specifically designed to drive the gates of external power MOSFETs used in Switchmode power applications. This device is an excellent choice for applications where board area, efficiency and cost are of primary importance.

Application Field

The MIC4420BN is a high-performance, cost-efficient gate driver for Switchmode power MOSFETs and IGBTs. It is designed to drive power devices in switching power supplies, AC/DC converters, DC/DC converters, redundant power factor correction systems, power converters and other similar high-current applications. It is also used for driving the gates of high-side and low-side power MOSFETs, as well as IGBTs. The MIC4420BN is a dual-gate driver, meaning it can be used to drive two power devices in parallel, eliminating the need for additional gate drivers.

Features

The MIC4420BN offers exceptional performance in terms of efficiency, reliability, and cost savings. It offers excellent pulse width modulation (PWM) speed and has low ripple during standby mode. The MIC4420BN is also designed to operate in a wide range of temperatures with no loss of efficiency, reliability, or performance. The MIC4420BN is equipped with an adjustable offset to optimize the turn-on and turn-off times of the devices it is driving. The adjustable offset allows the MIC4420BN to be used with different power MOSFETs and IGBTs with different gate characteristics. The MIC4420BN is also designed to be used with a wide variety of output voltages, such as both single and dual supply voltage supplies. This feature maximizes flexibility and allows for the design of power supplies with higher power ratings.

Working Principle

The MIC4420BN is a dual gate driver circuit which provides two outputs for driving two power MOSFETs or IGBTs. The device is powered from a single power supply, typically +12V. On the input side, the device can be driven from either TTL or CMOS logic levels. The gate driver is also designed to accept variable duty cycle PWM signals with a frequency up to 600 KHz. When the MIC4420BN is turned on, the two output drivers are activated simultaneously, allowing two power devices to be driven simultaneously and efficiently. The MIC4420BN also features an adjustable offset which allows the turn-on and turn-off times of the devices to be optimized. This adjustable offset can be adjusted by turning the preset trimmer mounted on the device. Once the desired turn-on and turn-off times have been achieved, the MIC4420BN can be used to drive the gates of power MOSFETs and IGBTs. The device is also designed with a built-in thermal protection which will shut off the outputs if the device overheats. The thermal protection will turn off the device until the device has cooled down to a safe operating temperature.

Conclusion

The MIC4420BN is a high-performance, cost-efficient gate driver. It is designed to be used with both low-side and high-side power MOSFETs and IGBTs. It offers excellent pulse width modulation, low ripple during standby mode, and adjustable offset to optimize the turn-on and turn-off times of the devices. The MIC4420BN is an excellent choice for Switchmode power applications where price, efficiency, and board area are important.

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