POWER AND LINEAR IC SOLUTIONS

Motor Control SoC Improves Efficiency, Cuts Noise and Component Count

Toshiba Electronics Europe has expanded its family of System on Chip (SoC) motor drive solutions with a three phase, sine wave PWM driver. They reduce component count and noise and improve the efficiency of BrushLess DC (BLDC) motor applications.



The TB6585FG Application Specific Standard Product (ASSP) is a complete motor driver solution that integrates commutation logic, sine wave PWM generation, Hall sensor amplification, motor drive power stage and protection functionality into a single, 36-pin HSOP package. Designed for <45W power and a wide 4.5V to 36V input range, the IC can deliver a maximum current of 1.8A. It suits a range of applications, including home appliances, pumps, fans and industrial motion control.

An analogue signal input enables the TB6585FG to modify the PWM duty cycle and control forward or reverse motor rotation speed. Combining a triangular waveform generated on-chip with the buffered, amplified inputs from three Hall effect sensors generates three modulated, synchronised commutation waveforms to drive the motor.

By providing sinusoidal waveforms to drive the motor phases, the TB6585FG helps minimise electrical and acoustic noise when polarities in the driver circuit switch between positive and negative. This promotes more efficient operation, helps to reduce vibrations and enhances reliability. The ability to control lead angle allows a designer to tune the delay between current and voltage phases, which further improves efficiency in the target application.

The TB6585FG offers configurable modes for improving motor start-up characteristics and has inbuilt protection against overcurrent conditions. An ability to detect excessive commutation frequency and low rotation speed also improves design flexibility.

Features

• Highly integrated, system on chip ASSP
• BLDC motor drive
• Three phase, sine wave PWM generation
• Reduces noise, vibration, component count
• Increases operation efficiency
• Commutation logic
• Hall sensor amplification x 3
• Motor drive output power stage
• Input voltage: 4.5V to 36V
• Power <45W
• 36-pin HSOP package

Applications

• Home appliances
• Pumps
• Fans
• Industrial motion control

For further information, including FREE TB6585FG Samples and the Toshiba Motor Solutions Guide, please click here