If a brushless motor is used instead of a brushed motor, the work that had to be done mechanically by the commutator is now done electrically by a three-phase inverter. The inverter requires a gate driver, which is usually controlled by a microcontroller implementing complex software algorithms. This adds to the complexity of the system and is a major technical challenge for engineers. The intelligent DC brushless motor control and driver chip LV8907 from ON Semiconductor can solve this challenge. This solution eliminates the need for external motor position sensors or system microcontrollers, reduces PCB footprint, and comes with embedded control algorithms. It eliminates the need for self-write motor control algorithms, reduces system complexity, shortens development cycles, and speeds time-to-market.
Intelligent DC Brushless Motor Solution LV8907 Overview
The LV8907 utilizes sensorless drive logic for sensorless 120 or 150 degree control commutation with approximately sinusoidal operation to meet silent drive requirements. Configurable parameters for a range of motor and load combinations, one-time programmable (OTP) memory for parameter storage, custom solution, eliminating external components to perform various settings, enabling independent operation, integrated gate drivers, for Driving an external N-MOSFET, the charge pump drive provides 100% duty cycle and extended low voltage operation. The chip interacts with the outside world through the LIN interface, which provides configuration, real-time control and diagnostics. In automotive applications, it is required to operate at 150 ° C ambient temperature (Ta) and 170 ° C junction temperature (Tj), LV8907 withstand working junction temperature of 175 ° C, to ensure that in the harsh automotive working environment Reliability, fully compliant with the AEC-Q100 standard.
The LV8907 is highly integrated with MOSFET gate drivers, LIN transceivers, and low-dropout regulators (LDOs) to minimize footprint; no need to rely on position sensors, no software defects, fault detection and diagnostics, integrated weekly A series of protection features such as term flow, overcurrent protection, overvoltage/undervoltage protection, overtemperature protection, and stall protection. The state machine based solution uses OTP for parameterization, and no data damage caused by EMI/EMC problems. System reliability; the LV8907 requires no software and is easy to customize, reducing development time by up to 80% over microcontroller-based solutions, speeding time-to-market and saving bill of materials.
