The DRV8234 is a high-performance integrated H-bridge motor driver with integrated speed and position detection using ripple counting along with additional features like motor speed and voltage regulation, stall detection, current sense output, current regulation, and protection circuitry.
The integrated ripple counting algorithm counts the number of ripples in the motor current to determine motor relative position and speed eliminating the potential need for encoders, hall sensors, or optical sensors. This reduces board space and design complexity, and saves on overall system cost. Integrated speed regulation is used to maintain constant motor speed over varying input supply voltages which minimizes current consumption and saves power over time. This is critical in applications that have different loading conditions or rely on battery power for operation where the input voltage is not constant. Soft-start and stop allows for a controlled turn-on and turn-off time, reducing large inrush currents to protect the motor windings from damage, thereby increasing system reliability and longevity.
An internal current mirror implements current sensing and regulation. This eliminates the need for a large power shunt resistor, saving board area and reducing system cost. The IPROPI current sense output allows a microcontroller to detect motor stall or changes in load conditions. Using the VREF pin, this device can regulate the motor current during startup and high-load events without interaction from a microcontroller. The device supports sensorless motor stall detection and reporting to microcontroller.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | DRV8234 2-A Brushed DC Motor Driver with Ripple Counting, Stall Detection, and Speed Regulation datasheet | PDF | HTML | 30 Aug 2022 |
| Application note | Solving Sensorless Brushed DC Motor Speed and Position Control Using Ripple Counting (Rev. A) | PDF | HTML | 29 May 2024 | |
| EVM User's guide | DRV821x and DRV823x Evaluation Module User's Guide (Rev. A) | PDF | HTML | 03 Apr 2024 | |
| Application brief | Sensorless Position Control For Brushed DC Motors | PDF | HTML | 02 Feb 2024 | |
| Certificate | DRV8234EVM EU Declaration of Conformity (DoC) | 19 Sep 2023 |
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The DRV8234 evaluation module (EVM) allows for easy evaluation of the DRV8234 device. The EVM has been programmed and configured to work out of the box and begin spinning motors right away.
The DRV8234 is an integrated motor driver with N-channel H-bridge, charge pump, current sense output, (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RTE) | 16 | Ultra Librarian |
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