SLOS754C June 2012 – August 2016 DRV2603
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Supply Voltage Rejection for Constant Vibration Strength
- 8.3.2 Low-Voltage Control Logic for Constant Vibration Strength
- 8.3.3 Thermal Protection
- 8.3.4 Overcurrent Protection
- 8.3.5 Linear Resonance Actuators (LRA)
- 8.3.6 Auto Resonance Engine for LRA
- 8.3.7 Eccentric Rotating Mass Motors (ERM)
- 8.3.8 Edge Rate Control
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
7 Parameter Measurement Information
7.1 Test Setup for Graphs
With no output filter, the output waveform from the DRV2603 looks similar to Figure 1. The output signal contains both a high frequency PWM component and a fundamental drive component which causes motion in the actuator. To measure or observe the fundamental drive component, a low-pass filter must be used to eliminate the PWM component. The digital filter function on a digital oscilloscope was utilized in the rest of the Typical Characteristic figures. A 1st order, low-pass filter corner between 1 kHz and 3.5 kHz is recommended.
Figure 7. Test Setup for Graphs
7.2 Alternate Test Setup
If a digital oscilloscope with digital filtering is not available, a 1st order, low-pass, RC filter network can be used instead. Care must be taken not to use a filter impedance that is too low. This can interfere with the back-EMF behavior of the actuator and corrupt the operation of the auto resonance function. A recommended circuit is shown in Figure 8.
Figure 8. Alternate Test Setup