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Toshiba Releases 40V/2.0A Stepping Motor Driver with Resistorless Current Sensing

Reduces External Components and Contributes to Space-Saving Circuit Boards

September 22, 2021

Toshiba Electronic Devices & Storage Corporation

Toshiba Releases 40V/2.0A Stepping MotorDriver with Resistorless Current Sensing

TOKYO—Toshiba Electronic Devices & Storage Corporation ("Toshiba") has added “TB67S539FTG” to its lineup of stepping motor driver IC series that support constant current control, for office automation, commercial and industrial equipment. The new driver carries out constant current motor control without a current sense resistor.

TB67S539FTG incorporates Toshiba’s latest DMOSFET device[1], which allows it to realize a motor output voltage rating of 40V and a motor output current rating of 2.0A[2]. Use of a current detector for constant current motor control eliminates the need for an external current sense resistor. The H-bridge circuit for motor control has an Nch/Nch configuration, and a built-in charge pump circuit for output stage control. In addition, the new driver does not require the external capacitor that is generally used to drive the gates on the H-bridge, because it is incorporated in the product. This helps saving the space on printed circuit boards.

TB67S539FTG supports 4.5V to 34V motor drive power supplies, and can be used for applications driven by 24V, and in applications with 12V drivers, including surveillance cameras and projectors.

TB67S539FTG adopts a compact QFN32 package to reduce heat dissipation during use. Low On-resistance (upper + lower) between the output transistor drain and source, 0.8Ω (typ.), reduces heat generation.

Notes:
[1] As of September 2021.
[2] Actual driven motor current depends on the use environment and such factors as ambient temperature and power supply voltage.

Applications

  •  Office automation, commercial and industrial equipment

Features

  • No need for a current sense resistor
  • No need for an external capacitor for the charge pump circuit
  • Low power consumption in sleep mode: IM1=1μA (max) @sleep mode

Main Specifications

(Unless otherwise specified, @Ta=25°C)

Part number

TB67S539FTG

Operating ranges

Motor power supply
VM (V)

@Ta=-20 to 85°C

4.5 to 34

Absolute maximum ratings

Motor output voltage VOUT (V)

40

Motor output current IOUT (A)

2.0

Supported motors

Bipolar stepping motor

Output transistor between
drain and source On resistance
(upper + lower) RON(D-S) typ. (Ω)

@VM=24V,
Tj=25°C,
IOUT=2.0A

0.8

Power consumption IM1 max (μA)

@sleep mode

1

Safety function

Over-current detection,
thermal shutdown,
under voltage lockout

Package

Name

QFN32

Size (mm)

5.0×5.0

Sample Check & Availability

Buy Online

Follow the links below for more on the new product.

TB67S539FTG

Follow the link below for more on Toshiba’s motor driver ICs.

Motor Driver ICs

To check availability of the new products at online distributors, visit:

TB67S539FTG

 

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