Two-Phase Bipolar Stepping Motor Driver IC for Office Automation and Financial Equipment

Published  August 25, 2022   0
S Staff
Two-Phase Bipolar Stepping Motor Driver IC

Toshiba Electronic Devices & Storage Corporation has expanded its lineup of stepping motor driver ICs with the launch of “TB67S549FTG” which is a stepping motor driver IC housed in a small package, with built-in constant-current control that does not require external circuit components. This new driver contributes to saving space on circuit boards and is suitable for industrial equipment such as office automation and financial equipment.

TB67S549FTG IC uses Toshiba’s DMOS FET for its output power transistor and features a motor output voltage rating of 40V and a motor output current rating of 1.5A. This new IC supports motor power supply voltages from 4.5V to 33V, and has a current consumption of up to 1μA in sleep mode, making it widely usable for 12V/24V power supply applications. Moreover, the use of the QFN24 package reduces the mounting area to about 64%.

Key Features

  • Monolithic device using BiCD process

  • Device for driving a bipolar stepping motor

  • A PWM constant current drive is realized without external current detection resistors owing to the built-in function of Advanced Current Detect System (ACDS).

  • A high efficiency PWM constant-current drive is realized owing to the built-in function of Advanced Dynamic Mixed Decay (ADMD).

  • Clock input control

  • Full, Half, Quarter, 1/8, 1/16, and 1/32 step resolutions are available.

  • BiCD process : DMOSFETs are integrated for output power transistors

  • High withstand voltage and high output current: 40 V / 1.5 A (absolute maximum rating)

This new driver incorporates a current detection part for constant-current motor control and requires no external capacitor for a charge pump circuit. This will reduce external circuit components, thereby saving space on circuit boards.