Flagship dual brushed motor driver in a surface mount package
The TB67H420FTG support industry-leading high power drives and contributes to space-saving by using a small surface-mount package. It can control two brushed motors (50V, 4.5A / 2 channels), via a dual bridge mode that can control each channel independently in the separated internal output unit. As a result Toshiba is postiting the device as its flagship next-generation DC brushed motor driver
A high power drive is a basic requirement for the motors used in printers and other office equipment, banking terminals, cash dispensers, and home appliances that need high torque drive. As the scope of application increases, so too does the demand for downsizing and space-saving devices.
These high power brushed motor drives requires high-voltage output, which imposes demands on high-power motor drivers, and support for rush current, which is specific to brushed motors. Combination circuits, applying discrete components (MOSFET) with high-voltage and low on-resistance characteristics, are the usual solution. However, while this approach realizes high-power drive, it increases the component count and prevents motor downsizing.
In addition to these advances, and alongside essential built-in error detections for over temperature and over current, the driver also integrates an error detection signal output function which allows an external device to evaluate specified errors.
The high-voltage, large-current drive is achieved with Toshiba’s latest 130nm process technology to create a single bridge mode with a current drive of 9.0 A and dual bridge mode with a current drive of 4.5A / 2 channels. Heat generation during motor driving is reduced by ultra-low on-resistance of 170mΩ in single bridge mode and 330mΩ for the dual bridge mode and the 48pin QFN package. The driver is in mass production now.
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