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TI's motor drivers target battery-powered apps

Posted: 24 Apr 2012 ?? ?Print Version ?Bookmark and Share

Keywords:battery-powered app? motor driver? microstepping indexer?

Texas Instruments Inc. (TI) has extended its line of what it considers are highly integrated DRV8x motor drivers with the release of three low-voltage devices for brushed DC and stepper motors. The DRV8834, DRV8835 and DRV8836 motor drivers claim to provide wide, low-voltage operating range, low RDS(ON) and ultra-low sleep currents, slashing power consumption by 80 percent compared to the nearest competitor. This extends battery life, improve thermal performance and increase system reliability. The devices also asserts PCB reduction by as much as 95 percent compared to other similar products.

DRV8836

The motor drivers claim to cut power use by 80 percent.

The DRV8834, DRV8835 and DRV8836 feature on-chip 32-step microstepping indexer and advanced motion control that minimize torque ripple for quiet, ultra-smooth motion in applications such as security video cameras, medical and office automation equipment. They also have RDS(ON) of 305m? and sleep current of 10nA that improves thermal performance in applications such as toys, e-locks, cameras, point-of-sale printers and smart meters.

According to the company, the devices provide greater intelligence to reduce design complexity while minimizing MCU MIPS requirements and software development, speeding time to market compared to discrete solutions. The products' overcurrent, overtemperature, shoot-though and undervoltage lock-out increase system reliability and manufacturing yields, added TI

The DRV8834 stepper motor driver features 2.5-10.8V operating range, up to 2.2A peak output current and on-chip 32 step microstepping indexer. Priced at $1.1, the 8 x 6mm HTSSOP package is available now while the 4 x 4mm QFN package will be available in 2Q12.

The DRV8835 stepper or brushed DC motor driver delivers 2-11V operating range, up to 1.5A output current per bridge, and includes separate logic and motor power supplies. Available in 2 x 3mm WSON package, the device costs $0.70.

The DRV8836 stepper or brushed DC motor driver has a 2-7-V operating range, up to 1.5A output current per bridge and includes a dedicated sleep pin. It costs $0.70 for the 2 x 3mm WSON package.

Evaluation modules (EVMs) are also available to quickly evaluate all three devices. Suggested retail pricing for the DRV8834EVM is US$99. The DRV8835EVM and DRV8836EVM are available for a suggested retail price of $49 each.





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