Toshiba Launches Brushless Motor Pre-Driver IC for Automotive Applications
2013/08/22Toshiba
模拟
August 21, 2013
Contributes to Low-Noise, Highly Efficient Motor Operation
TOKYO – Toshiba Corporation (TOKYO: 6502) today announced the launch of “TB9080FG”, a three-phase brushless motor pre-driver IC for general automotive applications, which realizes low-noise and highly efficient motor operation through a sinusoidal wave drive and lead angle control1. Mass production is scheduled to start in September this year.
Engine noise in vehicles equipped with an idling reduction system disappears when the system is activated, with the effect of making noise from car air conditioners much more audible. Demand for a method to cut air conditioner noise is increasing, but mechanical solutions, such as optimization of blade shape in blower fans, the major noise source, and noise absorbent material in air ducts, fall short of realizing low noise.
“TB9080FG” replaces 120-degree rectangular wave control with sinusoidal wave control that cuts noise from the blower fan motor electronically. Optimized lead angle control also contributes to the increased efficiency of the motor operation.
＜Key Features of the New Products＞
Sinusoidal wave control reduces noise
Use of a third harmonic wave realizes sinusoidal wave control, contributing to quieter motor operation.
■Digital filter prevents overshoot2 at motor start-up
Digital filter circuits control external PWM3 signal, securing a slow motor start that avoids overshoot.
■Built-in data table for 16 kinds of rotation numbers
A built-in data table supports use of motors with a range of pole numbers, from 4 to 12 poles.
■Optimized lead angle control realizes high efficiency
Motor current is measured and the lead angle automatically controlled in 1 degree increments, contributing to motor operation efficiency.
■Motor speed feedback control improves the accuracy of rotation speed
Motor rotation speed is controlled by comparing the target figure and the signal from external hall element sensors4.
＜Main Specifications＞
[1] A method to improve motor drive efficiency by controlling the phase difference of current and voltage
[2] The signal or value exceeds its target figure temporarily
[3] Pulse Width Modulation. A method to control torque and rotation speed of a motor by changing the on and off time in a constant period.
[4] A magnetic sensor to detect rotary position and rotation speed.
Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.
Toshiba Corporation- Semiconductor and Storage Products Company Website＞http://www.semicon.toshiba.co.jp/eng/index.html?mm=cp0822&no=02
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http://www.semicon.toshiba.co.jp/eng/index.html?mm=cp0822&no=02
