Realizes motor control with two dry-cell batteries
TOKYO—Toshiba Electronic Devices & Storage Corporation today announced the launch of "TC78H651FNG,” a dual-H-bridge driver IC for DC brushed motors and stepping motors that delivers the low voltage (1.8V) and high current (1.6A) essential for low voltage equipment powered by dry-cell batteries, such as mobile devices, electronic products for the home and USB drives. Sample shipments start today.
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 . The new product is suitable for motor applications driven by relatively low voltage batteries (1.8V to 6.0V).
Motor applications driven by relatively low voltage batteries (1.8V to 6.0V), mobile devices (cameras and compact printers) using 3.7V lithium-ion batteries, products for the home, such as gas stoves, smart meters, and electronic locks, toys using two 1.5V dry batteries, and devices using 5V USB power supply.
Power supply voltage
|1.8V to 6.0V|
(Absolute maximum rating)
|Number of H-bridge channels||2ch|
|Drive motors||DC brushed motors (driving two motors is possible.)|
|Bipolar stepping motors|
Output on resistance
(total of high and low side)
|0.25Ω (typ.) when VM = 5.0V and Ta = 25°C|
|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)|
|Other features||Built-in standby function: power consumption is 0μA (typ.)|
|Built-in penetration control function|
|Supports forward/reverse/stop rotation mode|
 Used to control forward and reverse rotation for DC brushed motors and stepping motors. Transistors and loads have an H-shaped configuration.
 Actual motor current is limited by operating conditions, such as ambient temperature and supply voltage.
 Resistive component when current flows. The lower resistance value achieves a lower loss in motor drives and suppresses heat generation.