Toshiba TB67S539FTG stepping motor driver

Toshiba Electronic Devices & Storage has added the TB67S539FTG to its line-up of stepping motor driver IC series that support constant current control, for office automation and commercial and industrial equipment. The driver carries out constant current motor control without a current sense resistor.

The product incorporates Toshiba’s latest DMOSFET device, which allows it to realise a motor output voltage rating of 40 V and a motor output current rating of 2 A. Use of a current detector for constant current motor control eliminates the need for an external current sense resistor. The H-bridge circuit for motor control has an Nch/Nch configuration and a built-in charge pump circuit for output stage control. In addition, the driver does not require the external capacitor that is generally used to drive the gates on the H-bridge, because it is incorporated in the product. This helps save space on printed circuit boards.

The device supports 4.5 to 34 V motor drive power supplies and can be used for applications driven by 24 V and in applications with 12 V drivers, including surveillance cameras and projectors. It adopts a compact QFN32 package to reduce heat dissipation during use. Low On-resistance (upper + lower) between the output transistor drain and source, 0.8Ω (typ), reduces heat generation.