LB11852FV-TLM-H Integrated Circuits (ICs)

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Power management integrated circuits (PMICs) are essential for the design of electronic systems, providing efficient power conversion and reliable motor control. They are widely used in consumer electronics, automotive, medical, and industrial applications. The LB11852FV-TLM-H is one such PMIC that is used for driving and controlling brushless motors. In this article, we will explain the application field and working principle of LB11852FV-TLM-H.

Application Field

The LB11852FV-TLM-H is an integrated circuit used to drive brushless motors (BLDCs) in a variety of applications. It is designed for use in medical and industrial equipment such as medical pumps, fan and motor control, industrial pumps, and robotic systems. In addition, it is suitable for electrically driven components in motorbikes, electronic scooters, and other automotive applications. The LB11852FV-TLM-H is also ideal for home appliances and consumer electronics, such as vacuum cleaners, air conditioners, washing machines, and refrigerators.

The LB11852FV-TLM-H has several features that make it suitable for these applications. It is designed with a wide operating voltage range of 4.5 V to 24 V and a high efficiency of up to 97%. It includes a built-in low-side MOSFET gate driver, which provides ultra-low gate charge and high EMI attenuation. This helps to reduce the power dissipation of the device and make it suitable for systems with stringent noise requirements. In addition, it has a small five-pin SIP package which is ideal for space-constrained systems.

Working Principle

The LB11852FV-TLM-H is a three-phase brushless motor driver IC. It has a three-phase bridge circuit with three pins for voltage input and three pins for current output. The voltage input pins are connected to a DC power supply, while the output pins are connected to the three-phase windings of the motor. When energized, the motor shaft turns in a continuous manner. The operation of the motor is controlled by the Control Logic block of the IC which comprises two embedded integrated circuits-the DC/DC converter and the motor control IC.

The DC/DC converter uses a simple pulse-width-modulation (PWM) method to regulate the current flowing through the motor windings. It works by comparing the current level with an internally-generated ramp wave and generating a corresponding PWM signal accordingly. This signal is then applied to the gate of the MOSFET switches in the three-phase bridge circuit.

In addition, the motor control IC is responsible for controlling the speed and torque of the motor. It is used to send the appropriate PWM signals to the DC/DC converter in order to adjust the voltage output to the motor. The motor control IC can be preprogrammed to achieve a wide range of speeds and torques depending on the operating conditions. The IC also includes protection features such as over-current protection, over-temperature protection, and fault detection.

Conclusion

The LB11852FV-TLM-H is a PMIC designed for driving and controlling brushless motors. It has a wide operating voltage range of 4.5 V to 24 V, providing a high efficiency of up to 97%. Its small five-pin SIP package is ideal for space-constrained systems and the built-in low-side MOSFET gate driver provides ultra-low gate charge and high EMI attenuation. The LB11852FV-TLM-H is suitable for use in medical and industrial equipment, consumer electronics, automotive applications, and more. The internal DC/DC converter and motor control IC provide excellent control over the speed and torque of the motor. Therefore, the LB11852FV-TLM-H is an ideal solution for driving and controlling brushless motors.

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