Toshiba has added a new stepper motor driver IC TB67S549FTG to its family of stepper motor driver ICs. TB67S549FTG is available in small 4x4mm QFN24 package featuring built-in constant-current control without the need of external circuit components. This chip is designed to save space on PCB. QFN24 package takes 36% less mounting area than QFN32 packaged TB67S539FTG, Toshiba's another same application IC.
TB67S549FTG uses Toshiba’s DMOS FET for its output power transistor, through which it can drive motor with a output voltage rating of 40V and output current rating of 1.5A.
This new driver integrates current detection function for constant-current motor control, helping the designer from using external capacitor for a charge pump circuit.
TB67S549FTG can operate from power supply voltages in the range of 4.5V to 33V, and consume current up to 1μA in sleep mode making it suitable for 12V/24V power supply applications.
Along with use for driving motors in printers, this device is suggested for financial electronic equipments such as Automatic teller machines (ATMs), Money-changing machines, and also surveillance cameras and projectors.
TB67S549FTG is designed to operate in the temperature range of -20 to 85°C. safety functions such as Over-current detection, Thermal shutdown, are Under voltage lockout are available in this chip.