TC4428AVUA

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The TC4428AVUA is an integrated circuit designed to drive bipolar N-channel MOSFETs, control power switching supplies, and protect the Gate portion of the MOSFET from damage. It belongs to the family of PMIC – Gate Drivers, a critical component used in a wide range of applications.

TC4428AVUA Applications

The TC4428AVUA is often used where high-pulse current is required, as it provides a low-cost, robust solution for controlling power supplies with high-frequency switching. It is often used in LCD displays, notebooks and in automotive, industrial and consumer applications. The device can be used in a variety of applications, such as home appliances, plasma TVs, air-conditioners, medical equipment, automotive electronics and telecommunications.

Apart from application in the above-mentioned areas, the TC4428AVUA can also be used in digital cameras and battery-operated devices. It ensures power supply sequencing, under-voltage and over-voltage monitoring and system reset. This device supports inrush current prevention and circuit protection.

TC4428AVUA Working Principle

The TC4428AVUA is an integrated circuit that contains two power stages – a high-side gate driver (HSGD) and a low-side gate driver (LSGD). The HSGD is responsible for sourcing current when the gate of the upper MOSFET is pulled high, and for sinking current when the gate of the upper MOSFET is pulled low. The LSGD is responsible for sourcing current when the gate of the lower MOSFET is pulled high, and for sinking current when the gate of the lower MOSFET is pulled low.

The current that the HSGD and LSGD can source or sink is determined by a current limiting resistor connected between the gate and GND. The output voltage level of the HSGD and LSGD is determined by the gate-source voltage of the MOSFET. The HSGD and LSGD are designed to have a fast rise and fall time to reduce switching losses. The device also contains over-current protection and thermal shutdown circuit to protect the MOSFET from damage caused by over-current and overheating.

Conclusion

The TC4428AVUA is an integrated circuit designed for driving bipolar N-channel MOSFETs, controlling power switching supplies, and protecting the Gate portion of the MOSFET from damage. It is often used in applications such as LCD displays, notebooks, home appliances, plasma TVs, air-conditioners, medical equipment, automotive electronics, and telecommunications where high pulse current is required. It ensures power supply sequencing, under-voltage and over-voltage monitoring and system reset. The device contains two power stages – a high-side gate driver (HSGD) and a low-side gate driver (LSGD) that help reduce switching losses, and a protection circuit to protect the MOSFET from damage.

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