FAN8024EDTF

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Power management integrated circuits (PMICs) are a critical component to the proper operation of electronic systems, due to their ability to regulate and manage voltage, current, and power. The FAN8024EDTF is one such PMIC from Fairchild Semiconductor that is specifically designed for switching and brushed motor applications. This article will discuss the device’s operating principles, application fields, and implementation details.

Overview of the FAN8024EDTF

The FAN8024EDTF is a full bridge motor driver/controller that can handle up to 20A peak current and 2A continuous current. It features a 16V autobias supply voltage, a selectable internal current limit, and low on-resistance MOSFETs, allowing it to operate with high energy efficiency. It also supports a wide range of battery types over a 3.2V to 4.5V operating voltage range. In addition, the device is equipped with multiple protection features, including over-voltage, over-current, and thermal shutdown.

The FAN8024EDTF is available in an 8-lead, 3mmx3mm UDFN package, making it an ideal solution for space-constrained applications. The device contains two logic pins, an enable (EN) and an enable inverter (INV), which can be used to control the motor. It is also capable of self-protection against under-voltage and over-voltage condition.

Application Fields of the FAN8024EDTF

The FAN8024EDTF is an ideal choice for switching and brushed motor applications, such as cordless drills, robotic vacuum cleaners, and roller blind motors. It is designed to have a high energy efficiency, which is essential for long operation in battery-powered devices. The wide operating voltage range makes it suitable for a variety of battery systems, while the low on-resistance MOSFETs allow it to handle high peak currents while dissipating minimal heat.

The FAN8024EDTF is also well-suited for motor applications with low load requirements, such as small fans, pumps, and solenoid valves. The device is small and efficient, making it ideal for handheld or portable applications. The enable and enable inverter pins can be used to control the motor, allowing the system to power up and down as needed.

Working Principle of the FAN8024EDTF

The FAN8024EDTF operates by controlling the current flow across its two MOSFETs in order to drive the motor. The device has two power inputs, an enable (EN) pin, and an enable inverter (INV) pin. When both pins are high, the device is enabled and the motor is driven. The current flow is regulated by the voltage at the enable pin and the enable inverter pin, allowing the device to be controlled with a wide range of voltages.

The device contains a control section and a full bridge driver. The control section consists of a comparator, a microprocessor, and a voltage regulator. The comparator monitors the voltage at the enable pin and the enable inverter pin. When the voltage is within the operating range, the comparator signals the signal processor, which then sends a signal to the full bridge driver to turn on and off each MOSFET.

The FAN8024EDTF also features two protection features. The over-voltage protection feature monitors the voltage at the enable pin. If the voltage exceeds a certain level, the device will automatically shut off, protecting the motor from damage. The thermal protection feature monitors the temperature and will shut off the device if the temperature exceeds a certain level.

Conclusion

The FAN8024EDTF is a full bridge motor driver/controller designed for switching and brushed motor applications. It supports a wide range of battery types over a 3.2V to 4.5V operating voltage range, and features an autobias mode for easy implementation. The device is equipped with multiple protection features for reliable operation and is available in an 8-lead, 3mmx3mm UDFN package. As such, the FAN8024EDTF is an ideal solution for portable and handheld applications requiring low to medium current.

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