The TB67S549FTG IC has a wide operating output range of 4.5 to 33V and 1.2A current delivery. It is also equipped with low RDS(on) and does not require a charge-pump capacitor to save space, reduce the bill of materials and simplify circuitry, says the company.

The IC can be used in a range of constant current control stepper motor applications including those found in office automation, commercial and industrial equipment. It is also suited for surveillance cameras and projectors.

Its advanced dynamic mixed decay (ADMD) system guarantees an efficient PWM current control under all conditions, said Toshiba, and the integrated clock interface allows up to 32 micro steps to be realised.

The device is housed in a miniature QFN24 package which at 4.0 x 4.0mm occupies just 64% of the mounting area of its predecessor IC. Internal monitoring circuitry for constant current control does not require an external current sense resistor, and with the charge pump capacitor also integrated, both the circuit size and component count are reduced.

The driver’s on resistance is 1.2Ω (typical), keeping power dissipation low and enabling greater efficiency. A power-saving sleep mode cuts the current consumption to below 1μA making the IC usable for 12V/24V power supply applications.

Protection features include over-current detection, thermal shutdown, and under-voltage lockout.

A compact evaluation board is also available. The Stepper 12 Click board has been created in partnership with Mikroe and is supported by a mikroSDK-compliant library.