FDD9411L-F085

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FDD9411L-F085 is a permanent magnet motor driver integrated circuit (IC) designed by Fairchild Semiconductor that can drive a three-phase brushless DC (BLDC) motor in single-ended, open-drain configuration. It is widely used in automotive systems such as power seats, car windows, wipers, steering motors, and fans. The device also features short-circuit protection, over-current protection, and under-voltage lockout.

The FDD9411L-F085 integrated circuit consists of three main components: a power supply IC, a low-side driver IC, and a two-level high-side driver IC. The power supply IC provides power to the low-side driver IC and the two-level high-side driver IC. The low-side driver IC is responsible for controlling the motor torque and direction. The two-level high-side driver IC controls the switching of the external MOSFETs.

The device is based on the FET/MOSFET technology, which is an efficient way to control motors in a robust way. For example, FET technology allows for the rapid switching of MOSFETs, which provides high-speed control of the BLDC motor. This technology also allows for over current protection, which prevents damage to the BLDC motor in the event of an overload. The device also includes a failsafe feature that lowers the current to a safe level if the circuit shuts down.

The operating principle of the FDD9411L-F085 is based on a voltage-spike-free, single-ended excitation technique, which is implemented using an insulated gate bipolar transistor (IGBT). The device operates in a three-phase configuration and is designed to drive the BLDC motor’s three windings in an alternating pattern. The device has three external MOSFETs that are used to switch the BLDC motor in a half-bridge configuration. The device also includes a buck regulator, a voltage regulator, and a buck boost converter that help to protect the BLDC motor from excessive voltage, current, and power demands.

The FDD9411L-F085 device is designed to operate in three different modes: full stop, forward, and reverse. The device is also equipped with a power-on reset (POR) circuitry that helps to initialize all parameters to their default state when the device is powered up. Additionally, the device features short-circuit protection, over-current protection, and under-voltage lockout that protect the device from damage due to excessive input voltage, current, or power.

In conclusion, the FDD9411L-F085 is an integrated circuit designed to drive a three-phase brushless DC motor in single-ended, open-drain configuration. The device consists of three main components: a power supply IC, a low-side driver IC, and a two-level high-side driver IC. The device is based on the FET/MOSFET technology and is designed to operate in three different modes: full stop, forward, and reverse. The device also incorporates a power-on reset (POR) circuitry, short-circuit protection, over-current protection, and under-voltage lockout that provide reliable protection to the device and the BLDC motor.

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