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Toshiba Launches H-bridge Driver IC Supporting 1.8V Low-Voltage and 4.0A Large-Current Drive

December 12, 2018

Toshiba Electronic Devices & Storage Corporation

Realizes motor control with two dry-cell batteries

TC78H653FTG

TOKYO—Toshiba Electronic Devices & Storage Corporation (“Toshiba”) today announced the launch of "TC78H653FTG,” an addition to its line-up of dual-H-bridge[1] driver ICs for DC brushed motors and stepping motors that delivers the low voltage (1.8V) and high current (4.0A)[2] essential for low voltage equipment powered by dry-cell batteries, such as mobile devices, electronic products for the home and USB drives.

In recent years, as IoT advances and wireless technologies find increasingly wide use, demand for applications that can be remotely operated via smartphones and other tools is increasing, and with it interest in battery-powered motor control.

This trend is stimulating demand for driver ICs capable of driving devices even at the low voltage of 1.8V (0.9V × 2 batteries, whose capacity is reduced by discharge though 1.5V, 1.2V, etc. are initial voltages.).

Until now, the mainstream devices have been H-bridge driver ICs constructed with bipolar transistors, which can achieve stable operation at low voltage. However, problems with this include large current consumption that shortens battery life and increase current losses in ICs, and insufficient motor torque, since the voltage applied to the motor is lowered.

Toshiba’s new dual-H-bridge driver IC uses Toshiba’s specialized DMOS process for low voltage drives to achieve a longer battery life with a stable low voltage operation. Improved motor torque is also realized by reducing IC losses through low on-resistance [3]. The new product is suitable for motor applications driven by relatively low voltage batteries (1.8V to 7.0V).

Main features

  1. Low current consumption prolongs battery life.
    (ICC = 0.6 mA (typ.) in operation mode when VM = 3.0V and Ta = 25°C; ICC = 0 µA (typ.) in standby mode when VM = 3.0V and Ta = 25°C)
  2. Low on-resistance reduces IC losses generated by voltage drops in the motor driver and increases the voltage applied to the motor, contributing to improved motor torque.
    (Ron = 0.11Ω (typ.) (total of high and low sides in large mode when VM = 5V and Ta=25°C)
  3. PWM control at 500 kHz is possible by high-speed output switching characteristics (ton = 90 ns, Toff = 90 ns).

Applications

Motor applications driven by relatively low voltage batteries (1.8V to 7.0V), mobile devices (cameras, electric toothbrushes, printers) using 3.7V lithium-ion batteries, products for the home, such as electronic locks, smart meters, electronic bidet toilet, and toys using two 1.5V dry batteries, and devices using 5V USB power supply.

Main Specifications of 1.8 V Low Voltage Drive H Bridge Driver IC Series

Product name TC78H651FNG TC78H653FTG(New)
Power supply voltage
(Operating range)
1.8V to 6.0V 1.8V to 7.0V
Output current
(Absolute maximum rating)

1.6A

2.0A in small mode
4.0A in large mode
Number of H-bridge channels 2ch 2ch in small mode
1ch in large mode
Drive motors

DC brushed motors (driving two motors is possible.)

Bipolar stepping motors

Output on resistance
(total of high and low side)
0.22Ω (typ.)

0.22Ω(typ.)in small mode

0.11Ω(typ.)in large mode

Detection functions Over current detection, thermal shutdown, and under voltage lockout
Package TSSOP16
(size: 5.0 mm x 6.4 mm, pin pitch: 0.65 mm)
QFN16
(size:3.0mm×3.0mm)
Other features

Built-in standby function: power consumption is 0μA (typ.)

High speed PWM specification

Stock Check & Purchase

Notes:

[1] Used to control forward and reverse rotation for DC brushed motors and stepping motors. Transistors and loads have an H-shaped configuration.

[2] The rating in the large mode and the actual motor current are limited by operating conditions such as ambient temperature and power supply voltage

[3] Resistive component when current flows. The lower resistance value achieves a lower loss in motor drives and suppresses heat generation.

For more information about the new product, please visit:

TC78H653FTG

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

Customer Inquiries:

System LSI Marketing Dept.II
Tel: +81-44-548-2188

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Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.