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Toshiba introduces unipolar stepping motor drivers

Posted: 01 Oct 2013 ?? ?Print Version ?Bookmark and Share

Keywords:motor driver? home appliance? industrial equipment?

Toshiba Corp. has unleashed a constant current control motor driver series aimed at unipolar stepping motors. The three motor drivers in the TB67S14x series realise a monolithic structure and small package by using an 80V analogue process. A monolithic structure also reduces power consumption, compared with a hybrid structure and bipolar transistor, stated the company.

High speed, high power motor drives are required in applications that include amusement machines, home appliances and industrial equipment, where unipolar stepping motors are widely used. Driver ICs that operates such motors require a 60V or higher absolute maximum rating to hold tolerance against overshoot of reverse voltage, and a hybrid structure combining motor controllers and high voltage discrete FET (output circuit) or bipolar transistor is generally applied, resulting a large package size.

The QFN48 package of the devices reduces the mounting area to about 27 per cent and the package volume to less than two per cent that of equivalent products in a HZIP25 package, and will contribute to equipment downsizing. The series does not require the highly accurate external resistance for current detection essential for a conventional constant current control motor driver IC, due to integration of Toshiba original current detecting circuit (ACDS), which also reduces the number of materials.

The product integrates a thermal shutdown circuit, over-current shutdown circuit and under-voltage lockout circuit, contributing to highly reliable application operation, Toshiba added.

Evaluation sample shipments are scheduled to start from December, this year.

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