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TC4426EPA application field and working principle

Introduction

TC4426EPA is a high-speed logic level power MOSFET and IGBT drivers with independent high and low side referenced output channels, designed to drive up to 2A peak of load current. This device is provided in an 8-pin SOIC package, and can be used as stand-alone or parallel to drive large load currents.

Applications

TC4426EPA is targetted for application in switch mode power supplies, DC-DC converters, inverters and motor control applications. A typical example for the use of TC4426EPA is driving the load in the converter application, such as the high current IGBTs and MOSFETs. The TC4426EPA has a wide range of features including overvoltage protection, improved load discharge and thermal shutdown.

Working Principle

The TC4426EPA is a high-speed logic level gate driver with independent high and low side referenced output channels. The TC4426EPA consists of two gate driver circuits, each providing a complementary gate drive to the high and low side of the MOSFET or IGBT devices. The TC4426EPA’s gate drive operates at a very high speed, up to 5 MHz switching frequency, eliminating the ringing issue and ensuring optimal efficiency of the power switching circuits.

The TC4426EPA utilizes a fast push-pull drive stage and high-speed switched current circuitry to provide up to 5 MHz switching, with a pull-up gate charge of up to 2 A peak. The device features overvoltage protection and load discharge features, thermal protection and a low quiescent current operation.

Conclusion

In conclusion, the TC4426EPA is an ideal high performance gate driver for driving MOSFETs and IGBTs in switch mode power supplies, dc-dc converters, inverters and motor control applications. The device features fast switching speeds up to 5MHz, high peak current output, overvoltage protection and load discharge features, thermal protection and a low quiescent current operation.

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