FDP8447L

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The FDP8447L is an N Channel enhancement mode vertical DMOS FET designed for medium voltage, low RDS(on) applications. The device’s maximum continuous drain source voltage is rated at 500V and it has a drain-source on-resistance of 0.0016 Ω. The FDP8447L features a logic level gate, which makes it suitable for applications with limited gate drive available, as well as improved performance in linear applications such as DC-to-DC conversion and motor control.

The FDP8447L device has a variety of applications, including stepper motor drives, switching power supplies, motor control, and DC-to-DC conversion. It is also suitable for fan and motor control, high-end solid state relays, and general purpose switching applications. In addition, the low RDS(on) and low gate charge of the FDP8447L makes it ideal for low-side switching applications. These features, coupled with the device’s high power and current handling capabilities (1.45A continuous drain-source current and 0.5P total gate charge) make it well-suited for a wide variety of power switching applications.

When using the FDP8447L, one must take into consideration the device’s maximum ratings, as applying a voltage that exceeds the maximum rated voltage can cause irreparable damage. Also, in order to prevent gate-oxide breakdown, the device’s gate voltage must never exceed the +20V rating, as this will degrade the device’s performance. The FDP8447L can operate at temperatures up to +125°C, so the drain-source on-resistance and gate charge will change as the device heats up. It is important to keep track of these changes and make sure the device stays within its maximum ratings.

The FDP8447L’s working principle is based on the enhancement-mode operation of vertical DMOS transistors. In this Operating mode, the transistor acts as an open circuit when the gate voltage is at zero, and current only flows from the drain to the source when the gate voltage reaches a certain threshold voltage. The gate voltage must exceed the threshold voltage to cause the device to turn on, and once the device is turned on, the gate voltage can be taken as low as 0.8V for the device to remain on. This feature makes the FDP8447L ideal for low-side switching applications.

In order to achieve the best possible performance from the FDP8447L, a few things should be kept in mind. The device’s RDS(on) is dependent on the temperature, so it is important to monitor the device’s temperature and take appropriate steps to keep it within its maximum ratings. The device also has a maximum current rating of 1.45A, so it is important to make sure that the device is not overloaded. Finally, it is important to keep the gate voltage within its specified range, as exceeding the 20V rating can cause irreversible damage.

In summary, the FDP8447L is a high power, low RDS(on) N-Channel DMOS FET. Due to its logic level gate, small size, and low gate charge, it is well-suited for low-side switching applications such as DC-to-DC conversion, motor control, and fan and motor control. Furthermore, users should take into account the device’s maximum ratings, especially its maximum gate voltage, to ensure that it is used in a safe and effective manner.

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