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DRV2625YFFR Datasheet(PDF) 10 Page - Texas Instruments |
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DRV2625YFFR Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 77 page  I 2C I/F REG Back-EMF Detection Control and Playback Engine M LRA or ERM OUT± GND REG TRIG/INTZ SDA SCL NRST Supply Correction Automatic Over-Drive and Braking Gate Drive VDD Automatic Resonance Tracking and Reporting Waveform Shape Select (LRA) Gate Drive VDD OUT+ VDD RAM 1 kB 2.7 V ± 5.5 V 1.8 V Loopable Waveform Sequencer Dynamic and Programmable Output Clamp Impedance Based Actuator Diagnostics Short Circuit Protection Off- Resonance Driving (LRA) Thermal Protection Battery Monitor Reg Map 10 DRV2625 SLOS879A – DECEMBER 2015 – REVISED DECEMBER 2015 www.ti.com Product Folder Links: DRV2625 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated 8 Detailed Description 8.1 Overview The DRV2625 device is a haptic driver that relies on a proprietary closed-loop architecture to deliver sharp, strong, and consistent haptic effects while optimizing power consumption. The internal library and loopable waveform sequencer, the automatic overdrive, and the braking simplifies the process of generating crisp and optimum haptic effects, reducing the burden imposed into the processing unit. The DRV2625 device has an automatic go-to-standby state and a battery preservation function to help reduce power consumption without user intervention. The NRST pin allows for a full shutdown state for additional power savings. The waveform shape selection allows for sine-wave and square-wave drive to customize the haptic feel as well as the audible performance. Off-resonance driving with automatic braking simplifies the implementation of non- resonant haptic solutions. 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Support for ERM and LRA Actuators The DRV2625 device supports both ERM and LRA actuators. The LRA_ERM bit must be configured to select the type of actuator that the device uses. 8.3.2 Smart-Loop Architecture The smart-loop architecture is an advanced closed-loop system that optimizes the performance of the actuator and allows for failure detection. The architecture consists of automatic resonance tracking and reporting (for an LRA), automatic level calibration, accelerated startup and braking, resistance based diagnostics routines, and other proprietary algorithms. |
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