TI spins out eight new motor drivers for stepper, brushed DC motors

Key features and benefits



* Bipolar stepper motor drivers: 2.5-A to 5-A peak current options and control interfaces for phase-enable (PH/EN), step/direction with indexer and pulse-width modulation (PWM) control. Supports 1/256 and greater microstepping, along with slow, mixed and fast decay modes, for smooth, quiet, high-resolution motion profiles in applications such as printers, scanners, security cameras, cash handlers, medical equipment and factory automation.

* Brushed DC motor drivers: 2.5-A to 5-A peak current options and control interfaces for PH/EN and PWM control. On-chip cycle-by-cycle inrush protection limits start-up and stall currents, protecting the driver and reducing overall system cost in a variety of applications, such as printers, robotics, toys, servo motors, textile manufacturing equipment, solenoid valves and consumer electronics.

* Robust, reliable and fully protected: Advanced on-chip protection, including over-current, over-temperature, shoot-through and under-voltage lock-out increases system reliability and manufacturing yields.

* Reduce design complexity and time to market: DRV8x motor drivers integrate the gate drive circuitry, MOSFETs, protection circuitry and current regulation circuitry to reduce design complexity, board space and time to market compared to discrete solutions.

* Upgrade path: Pin-for-pin compatibility with existing DRV8x motor drivers provides flexibility for high or low current.







Tools and support



An evaluation module (EVM), including schematics, gerbers, an easy-to-use graphical user interface for easy setup, and all necessary cabling and software, is available for each of the eight new motor drivers for a suggested retail price of $149.







Package, availability and pricing



The new DRV8x motor drivers are available today in a 9.7 mm x 6.4 mm HTSSOP package. All are priced at $2.25 in 1,000-unit quantities with the exception of the DRV8825, which is available for $2.40 for 1,000 units.







Product descriptions



New additions to the DRV8x motor driver family include:



* Bipolar stepper motor drivers



o DRV8813: Up to 2.5 A with four levels of current regulation and a PH/EN control interface.

o DRV8825: Up to 2.5 A with on-chip indexer supporting up to 32 microsteps.

o DRV8829: Up to 5 A with 32 levels of current regulation and a PH/EN control interface; two DRV8829 devices are required to drive a single 5-A bipolar stepper motor.

* Brushed DC motor drivers

o DRV8814: Supports two 2.5-A brushed DC motors with cycle-by-cycle inrush protection and a PH/EN control interface.

o DRV8840: Up to 5 A with cycle-by-cycle inrush protection and a PH/EN control interface.

* Bipolar stepper or brushed DC motor drivers

o DRV8841: Supports a single 2.5-A bipolar stepper motor or two 2.5-A brushed DC motors with four levels of current regulation, cycle-by-cycle inrush protection and a PWM control interface supporting brake.

o DRV8842: Supports a single 5-A brushed DC motor; two DRV8842 devices can also be used to drive a single 5-A bipolar stepper motor; includes 32 level of current regulation, cycle-by cycle inrush protection and a PWM control interface supporting brake.

o DRV8843: Supports a single 2.5-A bipolar stepper motor or two 2.5-A brushed DC motors with four levels of current regulation, cycle-by-cycle inrush protection and a PWM control interface supporting brake and coast.