A3984SLP-T

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A3984SLP-T is a kind of designed system used by Allegro MicroSystems is the term “current-score” technology, which enables higher current-exempted power supplies and more efficient motor control systems. This article will be focused on explaining its application field and working principle.

A3984SLP-T is mainly used for motor drivers and motor controllers, with features like low RDS (ON), small size, high current rating, and low power dissipation. It is a monolithic device with large continuous working current 12 A and peak working current up to 19Asupported by single internal MOSFET.

In addition, A3984SLP-T has built-in self-protection features like: Overvoltage protection (OVP), Undervoltage Lockout (UVL), Dual Overcurrent protection (OCP1 and OCP2). OVP protects the device from external faults by forcing the output voltage to a safe value above the estimated maximum external supply voltage. UVL prevents the device from starting up if the buses voltage is too low and GND pin is high. OCP1 ensures the device will shut down if the Phase current is over-current. OCP2 protects the device from having a continuous current over the drain voltage (Vds) limit. This feature is especially useful when a large induction is used in the system. These self-protection features makes this device more reliable and safer to use.

A3984SLP-T is also built-in with current-score technology features. This includes a 16-step current score table, providing the user with flexibility when selecting the suitable current rating for their application. The working principle of this current score system is based on the equivalent of the current doubling, which uses a higher feedback voltage to allow a higher inductor current when the motor is running, thus reducing switching losses and increasing motor efficiency.

To summarize, A3984SLP-T from Allegro MicroSystems is a single monolithic device mainly used for motor drivers and motor controllers, with various safety and protection features which makes it reliable and efficient. It also has the current-score technology which uses a higher feedback voltage to allow a higher inductor current and thus achieving higher motor efficiency. This device has proven to be reliable and effective in many applications, and it is an increasingly popular choice for automotive companies due to its impressive performance.

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