MIC5801YWM-TR

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A Power Management Integrated Circuit (PMIC) is an advanced multi-conductor integrated circuit designed to provide a wide range of power control solutions, including power distribution switches, load drivers, and low-level control circuitry. In this article, we will discuss the MIC5801YWM-TR, a power distribution switch and load driver specifically designed for automotive applications. We will analyze its application field and working principle to understand its functionality in detail.

Application Field

The MIC5801YWM-TR is a low-side, dual N-channel MOSFET, fully protected power distribution switch specifically designed for use in modern automotive vehicles including passenger cars, trucks, vans and other mobile applications. As an automotive-grade product, it is characterized by high reliability, robust design and compatibility with many different power sources. It is ideal for controlling current in motors, lamps, and other automotive applications.

The MIC5801YWM-TR is designed to efficiently drive loads up to 16A and achieve a high operating speed. The on-resistor of the device ranges from 3Ω to 4.6Ω, providing a wide operating range. Additionally, the MIC5801YWM-TR has a typical built-in clamping diode that protect the device from sudden spikes in the load current when switching on and off. This helps to extend the life of the device.

Working Principle

The MIC5801YWM-TR is a power distribution switch and load driver containing two N-channel MOSFETs with operating voltages up to 28V. It includes very low on-resistor FETs, overvoltage/reverse voltage protection diodes, current-foldback protection, and an integrated temperature sensor for thermal protection. It also features an over-current protection circuit that prevents contact welding of a load from an overcurrent situation.

The main power supply is connected to terminal P+ and P-, which is connected to the load. When the enable signal at EN is high, the low side MOSFET turns off, causing the load to be disconnected from the power supply. When the enable signal is low, the low side MOSFET turns on, thus connecting the load to the power supply. This allows the device to switch on and off the load with a single control signal.

In addition to controlling the power supply, the MIC5801YWM-TR also features fault protection. The integrated current-foldback protection circuit senses any overcurrent situation and turns off the low side MOSFET, protecting the device and load from any possible damage due to an overload. This feature also helps to extend the device’s life by eliminating any need for a manual reset.

Conclusion

The MIC5801YWM-TR is a power distribution switch and load driver designed for the automotive industry. It is capable of driving current up to 16A, and can be controlled via a single enable signal. Additionally, it offers protection against over-current, reverse voltage, and over-temperature. The integrated current-foldback protection further aids in extending the device life, by eliminating the need for manual reset due to an overload situation.

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