Toshiba Launches Unipolar Stepping Motor Driver

New chips feature integrated constant current detecting circuits in small package sizes to enable equipment downsizing and reduce component count.

Toshiba Electronics Europe (TEE) has launched the TB67S14x series of constant current control motor drivers for unipolar stepping motors used in home appliances and industrial equipment. Evaluation sample shipments are scheduled to start as of December 2013.

Home appliances and industrial equipment require high speed and high power motor drives for the unipolar stepping motors that are widely used in these applications. The operation of such motors requires a 60V or higher absolute maximum rating to protect the motors against reverse voltage. Typically, a hybrid structure combining motor controllers and high voltage discreet FET (output circuit) is applied, resulting in large package sizes.

In contrast, the new TB67S14x series is available in small package sizes, including the newly introduced QFN48 package that reduces the mounting area to approximately 1/3 that of equivalent products housed in a HZIP25 package. In addition, the integration of Toshiba’s current detecting circuitry (ACDS4) removes the need for external resistance current detection circuitry, reducing component count and further supporting equipment downsizing.

The three new devices have absolute maximum ratings of 80V and 3A and are fabricated using the industry leading BiCD 130nm, 80V analogue process.

Small packages such as QFN and HTSSOP can be used for system downsizing, while the HSOP package enables flow mounting on a paper phenolic board, which helps to reduce the cost of printed circuit board development. Continuous operation at high current is addressed by using a high-power dissipation package such as HZIP.

Both the TB67S141 and the TB67S142 offer a choice of 2 phase, 1-2-phase and W1-2-phase excitation modes, which corresponds to full- and half-stepping and 1/4 microstepping.

The TB67S149 offers a choice of 2 phase, 1-2 phase, W1-2 phase, 2W1-2 phase, 4W1-2 phase and 8W1-2 phase excitation modes, corresponding to full- and half-stepping, 1/4, 1/8, 1/16 and 1/32 microstepping.

About Toshiba:
Toshiba Electronics Europe (TEE) is the European electronic components business of Toshiba Corporation, which is ranked among the world’s largest semiconductor vendors. TEE offers one of the industry's broadest IC and discrete product lines including high-end memory, microcontrollers, ASICs, ASSPs and display products for automotive, multimedia, industrial, telecoms and networking applications. The company also has a wide range of power semiconductor solutions as well as storage products like HDDs, SSDs, SD Cards and USB sticks.

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Name: Matt Wilkinson
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Release ID: 23703