LB11867FV-W-AH: Three-Phase Brushless DC Motor Pre-Driver from onsemi

The LB11867FV-W-AH from onsemi is a highly integrated three-phase brushless DC (BLDC) motor pre-driver designed to deliver precise and efficient motor control in a wide range of applications. This IC serves as the critical intermediary between a low-power microcontroller (MCU) and the high-power MOSFETs that drive the motor, simplifying system design and enhancing overall reliability.

A key strength of the LB11867FV-W-AH is its flexible sensorless drive capability. It can eliminate the need for Hall sensors by detecting the motor's back electromotive force (BEMF), reducing system cost, complexity, and physical size. For applications requiring maximum precision, it also fully supports Hall sensor inputs. The device incorporates built-in protection features such as under-voltage lockout (UVLO), over-current protection (OCP), and thermal shutdown (TSD), which are essential for safeguarding the motor and the driver circuitry under fault conditions.

The driver offers multiple speed control methods, including PWM input for direct speed control and an internal VCO (Voltage-Controlled Oscillator) that allows speed to be set via an analog voltage. This versatility makes it suitable for diverse applications, including cooling fans, air purifiers, blowers, and other consumer appliances, as well as industrial equipment.

ICGOOODFIND: The onsemi LB11867FV-W-AH stands out as a robust and versatile solution for modern BLDC motor drives. Its combination of sensorless operation, comprehensive integrated protection, and flexible control interfaces provides designers with a reliable foundation for creating efficient, compact, and cost-effective motor control systems.

Keywords:

BLDC Motor Driver

Sensorless Control

Three-Phase Pre-Driver

Motor Protection

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