Toshiba announced the launch of the double H bridge 1 driver IC "TC78H651FNG" for the brush DC motor and stepping motor, which provides a low voltage (1.8V) required for dry batteries such as mobile devices, home electronics and USB drivers. Large current (1.6a) [2]. Sample delivery is started.
In recent years, with the continuous advancement of the Internet of Things technology and the increasing application of wireless technology, people can increase the demand for remote operations that can be remotely operated through smartphones and other tools, so the battery-powered motor control has also received it.
This trend drives people to support 1.8V low voltage (0.9V 2 batteries, although the initial voltage is 1.5V, 1.2V, etc., by discharging the voltage dropped to 0.9V) drive device driver IC.
Up to now, mainstream equipment is still a H-bridge driver IC that is stably operated with a bipolar transistor. However, since the motor input voltage is lowered, the program has a series of problems, including shortening battery life and causes large current consumption problems with increased IC current loss, and problems with insufficient motor torque.
Toshiba New Double H-bridge driver IC adopts Toshiba to low voltage DMOS specialized technology, which not only guarantees the stability of low voltage operation, but also prolongs battery life. In addition, the product is also reduced by low-conducting resistors [3] to improve the motor torque. This new product is suitable for motor applications driven by a relatively low voltage of a voltage (1.8V to 6.0V).
Main characteristics
(1) Low current consumption extension battery life.
(In the working mode, VM = 3.0V and Ta = 25 ° C, ICC = 0.6 mA (typ); in standby mode, VM = 3.0V and Ta = 25 ° C, ICC = 0 μA (typical value)
(2) The low-conducting resistance reduces the IC loss generated by the voltage drop in the motor driver and increases the motor input voltage to help improve motor torque.
(RON = 0.25 Ω (typ) (when VM = 5V and TA = 25 ° C, the sum of the high side and low side)
(3) Error detection function for overcurrent protection, overheating protection, undervoltage locking helps to improve equipment security.
Application occasion
Motor applications driven by a relatively low voltage (1.8V-6.0V), using a mobile device of a 3.7V lithium-ion battery (camera and compact printer), household product (gas stove, smart meter, electronic lock, etc.), Use two 1.5V dry batteries toys and devices with 5V USB power.
Main specifications
Note:
[1] Used to control the forward turn and reversal of the brush DC motor and the stepping motor. Transistors and loads are H-shaped structures.
[2] The actual motor current is limited, such as ambient temperature and power supply voltage.
[3] The resistance component during current flow. The lower resistance value achieves lower loss in the motor driver and suppresses fever. , Reading the full text, the technology area
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