NJM3772FM2 Integrated Circuits (ICs)

Power management integrated circuits (PMICs) are increasingly used in a wide range of applications, including motor drivers, controllers, and regulators. These integrated circuits serve to efficiently manage and optimize the power levels in a range of electronic systems. The NJM3772FM2 is a PMIC specifically designed to meet the needs of motor control applications. In this article, the features, applications, and working principle of the NJM3772FM2 will be discussed.

Features

The NJM3772FM2 is a dual-channel MOSFET driver for motor control. It features an integrated low-side MOSFET driven by a constant on-time (COT) PWM control circuit, a dedicated PFC controller circuit, and a wide range of protections, including over-voltage protection (OVP), over-current protection (OCP), shutdown protection, and more. It also has thermal protection, a maximum duty cycle of 90%, and a monitoring system to detect over-current and over-voltage conditions. The NJM3772FM2 also provides user-adjustable parameters such as voltage, current, and on-time.

Applications

The NJM3772FM2 is suitable for a variety of motor control applications, including three-phase BLDC (brushless DC) motors, brushless DC fan motors, and permanent magnet synchronous motors. It can also be used for driving various resistive, inductive, and capacitive loads, such as lighting, and is commonly used in consumer electronics, automotive, and industrial control applications.

Working principle

The NJM3772FM2 operates according to a constant on-time (COT) mode of PWM control. The COT PWM control circuit produces a constant on-time pulse, every OFF period, by switching the output MOSFETs at the beginning of each period. The PWM duty cycle is adjusted based on the user-set voltage and current requirements. The PFC controller works in continuous conduction mode and consists of a voltage-controlled current limit, voltage-controlled on-time, and a soft-start function. The system also has a wide range of protections, such as over-voltage protection (OVP), over-current protection (OCP), shutdown protection, and thermal protection.

In conclusion, the NJM3772FM2 is a PMIC specifically designed for motor control applications. It features an integrated low-side MOSFET driven by a COT PWM control circuit, a dedicated PFC controller, and a wide range of protection features. It has a wide range of applications, such as three-phase BLDC (brushless DC) motors, brushless DC fan motors, and permanent magnet synchronous motors, making it suitable for consumer electronics, automotive, and industrial control applications.