Product category:
Power Supply ICs and Controllers
News Release from: Toshiba Electronics Europe | Subject: TB6582FG
Edited by the Electronicstalk Editorial
Team on 01 June 2007
Motor driver produces full sinewave
Single-chip sensorless motor controller offers full-sinewave PWM motor drive output to reduce complexity of brushless DC motor applications.
Toshiba Electronics Europe has developed what it claims is the industry's first single-chip sensorless motor controller application specific standard product to offer full-sinewave PWM motor drive output The new TB6582FG will significantly reduce the complexity and component count of brushless DC (BLDC) motor applications ranging from home appliances and pumps to industrial automation and automotive motion control
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Unlike MCU-based alternatives, the new device is a cost optimised state machine which does not even require programming.
Specifically, the TB6582FG takes the analogue speed inputs supplied by a host microcontroller and provides a complete full-wave sinewave PWM drive output without the need for additional processing.
The sinusoidal motor coil current waveform provides for smoother BLDC motor operation and lower electrical and acoustic noise than is possible with conventional PWM outputs while still allowing designers to realise the benefit of PWM efficiency.
Toshiba has integrated onboard circuitry that accurately calculates rotor speed and position using phase current information, allowing designers to eliminate the need for Hall sensors.
This not only reduces component count but also improves application reliability, and makes the TB6582FG ideal for applications where addition of sensors is not practical or commercially unviable.
The TB6582FG features a built-in triangular wave generator with a carrier wave frequency of 252Hz and an integrated dead time function that allows safe operation of the power FETs in a push-pull configuration.
Control of motor rotation speed in both forward and reverse directions is achieved by changing the PWM duty cycle based on the input from the host microcontroller.
Suitable for operation with supply voltages from 6.5 to 16.5V, the new motor controller SoC features an onboard regulator that provides a typical reference voltage of 5V.
Lead angle adjustment capability allows designers to tune their applications for optimum efficiency.
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