In recent years, with the continuous development of the Internet of Things technology and the increasing use of wireless technology, people can continue to improve the application requirements of remote control through smartphones, so the motor control requirements of the battery are also increased.
This trend will push people to support 1.8V low voltage (2 pieces of 0.9V battery, although the initial voltage is 1.5V, 1.2V, etc., can reduce the voltage of the driver IC of the device by discharging the voltage to 0.9V).
Previously, the mainstream equipment was constructed by bipolar transistors, and the H-bridge driver IC that enables stable operation at a low voltage. However, this device also has problems, including high power consumption, which shorten battery life and increases IC current loss, and low motor voltage is low, which also causes insufficient motor torque.
For low voltage, demand high current driver IC, Toshiba recently announced a for a brushed DC motor and a stepping motor Release double H-bridge [1] The driver IC series of new products "TC78H653FTG", the new product provides a mobile device, desired low voltage consumer electronics and other battery-powered USB device driver (1.8V) and high current (4.0A) [2].
Toshiba TC78H653FTG using DMOS technology designed for low voltage driving, can be achieved not only the stability of the low-voltage operation, also extending battery life.
Further, TC78H653FTG through the low ON-resistance [3] reduce IC loss 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 7.0V).
Main characteristics
1. The low current consumption to extend battery life;
Operating mode, VM = 3.0V and Ta = 25 ° C, ICC = 0.6mA (typical value); standby mode, VM = 3.0V and Ta = 25 ° C, ICC = 0μA (typical value)
2. The low on-resistance can be reduced by a voltage drop and the motor driver IC generated loss, motor voltage can also be improved, thereby improving the torque of the motor;
Ron = 0.11Ω (typ.) (VM = 5V and when Ta = 25 ° C, the high-current mode and the low-side)
3. PWM control is achieved by a high speed switching characteristics of the output at 500kHz.
ton = 90ns, Toff = 90ns
application
Battery driven by a relatively low voltage applications (1.8V to 7.0V), the 3.7V lithium-ion battery using mobile devices (cameras, electric toothbrushes, printer, etc.), using two 1.5V dry electronic locks, smart meter, smart toilet cover and toys and other household products, as well as the use of 5V USB powered devices.
Note
[1] for controlling the brushed DC motor and the stepper motor forward and reverse. A load transistor and an H-shaped configuration;
[2] and the actual motor current rating is limited by the ambient temperature and power supply voltage operating conditions at a large current mode;
When the resistance component [3] the current flow. A low resistance value to reduce the loss of the motor drive, while reducing the generation of heat. Read the full text of the original title: A + to meet the low voltage high current drive of the driver IC
Article Source: [Micro Signal: Toshiba_Semicon, WeChat public number: Toshiba hard drive] Welcome to add attention! Please indicate the source of the article.
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