MIC4421ZT

Logic Voltage - VIL, VIH:	0.8V, 2.4V
Base Part Number:	MIC4421
Supplier Device Package:	TO-220-5
Package / Case:	TO-220-5
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 150°C (TJ)
Rise / Fall Time (Typ):	20ns, 24ns
Input Type:	Inverting
Current - Peak Output (Source, Sink):	9A, 9A
Series:	--
Voltage - Supply:	4.5 V ~ 18 V
Gate Type:	IGBT, N-Channel MOSFET
Number of Drivers:	1
Channel Type:	Single
Driven Configuration:	Low-Side
Part Status:	Active
Packaging:	Tube

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MIC4421ZT Application Field and Working Principle

Introduction to MIC4421ZT

The MIC4421ZT is a high-performance gate driver integrated circuit (IC) from Micrel, Inc. It is a high-voltage and high-current gate driver designed to drive low-impedance, high power IGBTs and MOSFETs used in automotive, industrial and medical applications. The device is built around a high-performance voltage regulator with adjustable slew rate over the entire power supply range. In addition, the device features adjustable output current, a wide adjustment range and an over-temperature protection circuit.

Applications

The MIC4421ZT provides automated solutions for applications such as power supplies, motor controllers and inverters. It can also be used in automotive applications such as automotive alternator, engine control modules and ECU, fuel injectors and pumps, air conditioning, electric vehicles and power distribution. Additionally, the device is suitable for industrial applications such as electric tools, LED lighting, welding, and robotics.

Working Principle

The MIC4421ZT is a fully integrated, high-performance automotive grade gate driver. It is capable of driving large loads such as IGBTs and MOSFETs up to 3A absolute. The device works in PWM mode, providing continuous on/off control of the IGBTs and MOSFETs. Its high-voltage and high-current capabilities enable it to drive large loads in the most demanding automotive, industrial and medical applications.The device features an integrated voltage regulator with adjustable slew rate over the entire operating range, ensuring a smooth and controlled drive of the IGBTs and MOSFETs. Additionally, it features an adjustable output current limiting, a wide adjustment range, allowing it to be used for a wide range of devices, as well as an over-temperature protection circuit.The MIC4421ZT has an internal thermal shutdown system that can protect the device from being damaged due to overheating. It also has an open-drain pulse-width modulation (PWM) output. The open-drain PWM output is used to control the gate voltage of the IGBTs and MOSFETs. Additionally, the device also has an internal voltage reference that allows for a more precise adjustment of the output current.

Conclusion

The MIC4421ZT is a high-performance gate driver IC from Micrel, Inc. It is designed to drive low-impedance, high power IGBTs and MOSFETs used in automotive, industrial and medical applications. The device is built around a high-performance voltage regulator with adjustable slew rate over the entire power supply range. It features adjustable output current, a wide adjustment range and an over-temperature protection circuit. The MIC4421ZT can be used for applications such as power supplies, motor controllers, inverters, automotive alternator, engine control modules and ECU, fuel injectors and pumps, air conditioning, electric vehicles and power distribution, electric tools, LED lighting, welding, and robotics. Its high-voltage and high-current capabilities enable it to drive large loads in the most demanding automotive, industrial and medical applications.

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