Overview
The DRV2605L, produced by Texas Instruments, is a versatile haptic driver designed to control both Linear Resonance Actuators (LRA) and Eccentric Rotating Mass (ERM) motors. This device is part of the DRV2605L family and is known for its advanced smart-loop architecture, which enhances the performance and reliability of haptic feedback systems. It operates over a shared I2C-compatible bus or PWM input signal, providing flexible control and improved actuator performance in terms of acceleration consistency, start time, and brake time.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 2 to 5.2 | V |
| Digital Low-Level Input Voltage (VIL) | 0.5 | V |
| Digital High-Level Input Voltage (VIH) | 1.3 | V |
| LRA Frequency Range | 125 to 300 | Hz |
| PWM Input Frequency | Up to 250 kHz | kHz |
| Load Impedance (ZL) | 8 Ω (at VDD = 5.2 V) | Ω |
| Supported Interface | I2C / PWM | |
| Package Type | DSBGA (9-Pins) |
Key Features
- Smart-Loop Architecture: Provides automatic resonance tracking and feedback-optimized drive for both LRA and ERM actuators, ensuring consistent motor performance and failure detection.
- Auto-Resonance Engine for LRA: Tracks the resonant frequency of the LRA in real-time, adjusting to any frequency shifts during operation.
- Audio-to-Vibe Mode: Automatically converts audio input signals to meaningful haptic effects.
- Licensed Effects Library: Includes over 100 licensed effects from Immersion's TouchSense 2200 software, comprising 6 ERM libraries and 1 LRA library.
- Real-Time Playback Mode: Allows the host processor to bypass the library playback engine and play waveforms directly through I2C.
- Open-Loop Operation: Automatically transitions to open-loop operation if the LRA actuator is not generating a valid back-EMF voltage.
- LED Indicator: Built-in LED indicating power status, which can be permanently disabled by desoldering a dedicated jumper.
Applications
- Mobile Devices: Enhances user experience in smartphones, tablets, and other portable devices with advanced haptic feedback.
- Gaming Controllers: Provides realistic and immersive gaming experiences through precise haptic effects.
- Automotive Systems: Used in automotive infotainment systems and driver feedback mechanisms.
- Medical Devices: Utilized in medical equipment to provide tactile feedback and enhance user interaction.
- Consumer Electronics: Found in various consumer electronics such as smart home devices, wearables, and gaming consoles.
Q & A
- What is the operating voltage range of the DRV2605L?
The DRV2605L operates within a supply voltage range of 2 to 5.2 volts.
- What types of actuators does the DRV2605L support?
The DRV2605L supports both Linear Resonance Actuators (LRA) and Eccentric Rotating Mass (ERM) motors.
- What communication interfaces does the DRV2605L use?
The DRV2605L uses I2C and PWM input signals for communication.
- What is the smart-loop architecture in the DRV2605L?
The smart-loop architecture is an advanced closed-loop system that optimizes actuator performance, including automatic resonance tracking, feedback-optimized drive, and failure detection.
- Does the DRV2605L support real-time playback mode?
Yes, the DRV2605L allows the host processor to bypass the library playback engine and play waveforms directly through I2C in real-time playback mode.
- What is the audio-to-vibe mode in the DRV2605L?
The audio-to-vibe mode automatically converts audio input signals to meaningful haptic effects.
- What kind of effects library does the DRV2605L include?
The DRV2605L includes a licensed version of Immersion's TouchSense 2200 software with over 100 licensed effects, comprising 6 ERM libraries and 1 LRA library.
- How does the DRV2605L handle LRA actuator back-EMF voltage?
The DRV2605L automatically synchronizes with the LRA when it generates a valid back-EMF voltage and transitions to open-loop operation if the back-EMF voltage is invalid.
- What is the package type of the DRV2605L?
The DRV2605L is packaged in a 9-pin DSBGA (YZF) package.
- Does the DRV2605L have a built-in LED indicator?
Yes, the DRV2605L has a built-in LED indicating power status, which can be permanently disabled by desoldering a dedicated jumper.
