4.5 to 33V stepper motor driver saves space, simplifies design

A small and integrated stepper motor driver from Toshiba has a wide operating voltage and 1.2A current delivery. The TB67S549FTG IC has low RDS(on) and does not need a charge pump capacitor.

The TB67S549FTG has an operating output voltage range from 4.5 to 33V and an operating current of up to 1.2A. It is suitable for a range of constant current control stepper motor applications including those found in office automation, commercial and industrial equipment as well as surveillance cameras and projectors.

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

Housed in a 4.0 x 4.0mm QFN24 package, the TB67S549FTG occupies only 64 per cent of the mounting area of its predecessor IC, saving circuit board space. The internal monitoring circuitry for constant current control does not require an external current sense resistor and the charge pump capacitor is also integrated, reducing circuit size as well as component count.

The on resistance of the motor driver output block is at only 1.2 Ohm (typical), keeping power dissipation low for greater efficiency. In addition, the TB67S549FTG has a power saving sleep mode that cuts the current consumption to below one microA and therefore usable for 12V / 24V power supply applications.

The TB67S549FTG also integrates protection functions, including over-current detection, thermal shutdown and under-voltage lockout.

Toshiba has also introduced a compact evaluation board for the stepper motor IC. The Stepper 12 Click board has been created in partnership with Mikroe and supported by a mikroSDK-compliant library.

Toshiba Electronics Europe (TEE) is the European electronic components business of Toshiba Electronic Devices and Storage. TEE offers European consumers and businesses a variety of hard disk drive (HDD) products plus semiconductors for automotive, industrial, IoT, motion control, telecomms, networking, consumer and white goods applications. The company’s portfolio also encompasses power semiconductors and other discrete devices ranging from diodes to logic ICs, optical semiconductors as well as microcontrollers and application specific standard products (ASSPs).

TEE has headquarters in Düsseldorf, Germany, with branch offices in France, Italy, Spain, Sweden and the United Kingdom providing marketing, sales and logistics services. 


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