ZHCSDF3D May 2014 – March 2018 DRV2605L
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 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 Support for ERM and LRA Actuators
- 8.3.2 Smart-Loop Architecture
- 8.3.3 Open-Loop Operation for LRA
- 8.3.4 Open-Loop Operation for ERM
- 8.3.5 Flexible Front-End Interface
- 8.3.6 Edge Rate Control
- 8.3.7 Constant Vibration Strength
- 8.3.8 Battery Voltage Reporting
- 8.3.9 One-Time Programmable (OTP) Memory for Configuration
- 8.3.10 Low-Power Standby
- 8.3.11 I2C Watchdog Timer
- 8.3.12 Device Protection
- 8.4 Device Functional Modes
- 8.5
Programming
- 8.5.1 Auto-Resonance Engine Programming for the LRA
- 8.5.2 Automatic-Level Calibration Programming
- 8.5.3 I2C Interface
- 8.5.4 Programming for Open-Loop Operation
- 8.5.5 Programming for Closed-Loop Operation
- 8.5.6 Auto Calibration Procedure
- 8.5.7 Programming On-Chip OTP Memory
- 8.5.8 Waveform Playback Programming
- 8.6
Register Map
- 8.6.1 Status (Address: 0x00)
- 8.6.2 Mode (Address: 0x01)
- 8.6.3 Real-Time Playback Input (Address: 0x02)
- 8.6.4 Library Selection (Address: 0x03)
- 8.6.5 Waveform Sequencer (Address: 0x04 to 0x0B)
- 8.6.6 GO (Address: 0x0C)
- 8.6.7 Overdrive Time Offset (Address: 0x0D)
- 8.6.8 Sustain Time Offset, Positive (Address: 0x0E)
- 8.6.9 Sustain Time Offset, Negative (Address: 0x0F)
- 8.6.10 Brake Time Offset (Address: 0x10)
- 8.6.11 Audio-to-Vibe Control (Address: 0x11)
- 8.6.12 Audio-to-Vibe Minimum Input Level (Address: 0x12)
- 8.6.13 Audio-to-Vibe Maximum Input Level (Address: 0x13)
- 8.6.14 Audio-to-Vibe Minimum Output Drive (Address: 0x14)
- 8.6.15 Audio-to-Vibe Maximum Output Drive (Address: 0x15)
- 8.6.16 Rated Voltage (Address: 0x16)
- 8.6.17 Overdrive Clamp Voltage (Address: 0x17)
- 8.6.18 Auto-Calibration Compensation Result (Address: 0x18)
- 8.6.19 Auto-Calibration Back-EMF Result (Address: 0x19)
- 8.6.20 Feedback Control (Address: 0x1A)
- 8.6.21 Control1 (Address: 0x1B)
- 8.6.22 Control2 (Address: 0x1C)
- 8.6.23 Control3 (Address: 0x1D)
- 8.6.24 Control4 (Address: 0x1E)
- 8.6.25 Control5 (Address: 0x1F)
- 8.6.26 LRA Open Loop Period (Address: 0x20)
- 8.6.27 V(BAT) Voltage Monitor (Address: 0x21)
- 8.6.28 LRA Resonance Period (Address: 0x22)
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
9.2.2.1.2 Linear Resonance Actuators (LRA)
Linear resonant actuators (LRAs) vibrate optimally at the resonant frequency. LRAs have a high-Q frequency response because of a rapid drop in vibration performance at the offsets of 3 to 5 Hz from the resonant frequency. Many factors also cause a shift or drift in the resonant frequency of the actuator such as temperature, aging, the mass of the product to which the LRA is mounted, and in the case of a portable product, the manner in which the product is held. Furthermore, as the actuator is driven to the maximum allowed voltage, many LRAs will shift several hertz in frequency because of mechanical compression. All of these factors make a real-time tracking auto-resonant algorithm critical when driving LRA to achieve consistent, optimized performance.
Figure 62. Typical LRA Response