New constant current stepper motor driver IC released

Toshiba Electronics Europe GmbH introduced the TB67S559FTG 50V/3A stepper motor driver IC, which supports constant current control with built-in current detection. Housed in a 5mm x 5mm QFN32 package, the device operates over a wide 8.2V to 44V output voltage range to cover 12V, 24V, and 36V applications, including office automation (OA) equipment, POS terminals, vending machines, surveillance cameras, industrial equipment, and more.

The IC represents a notable voltage and current rating upgrade to its pin/function compatible predecessor, the 40V/2A TB67S539FTG, and offers an ultra-low on-resistance (RDS(ON)) 0.4-Ohm (typ., covering the upper and lower transistor). When in sleep mode, the device draws a maximum current of 1μA. The new driver IC, therefore, allows engineers to improve the efficiency and reliability of their designs while decreasing waste heat.

The device eliminates the necessity for external current sense resistors with built-in current detection circuitry. The built-in charge pump circuit does not need an external capacitor. Eliminating the requirement for these external components allows substantial space saving in the mounting area.

In addition to the TB67S559FTG and the pin/function compatible TB67S539FTG, the company provides an extensive selection of stepper motor drivers manufactured using a BiCD process that ensures high accuracy and high current capability. The driver ICs offer a range of advanced features, covering a wide spectrum of voltage and current ratings, and are available in various packages.