مدار مجتمع (آی سی) آی سی‌کاربرد ویژه

Product Attributes

Introduction

The Cirrus Logic CS40L25 and CS40L25B are self-contained haptics signal generators that integrate a high-performance haptics driver, a Halo Core™ digital signal processor and a driver voltage boost converter. These devices are resonance aware to drive high performance linear resonant actuators (LRAs) and voice coil motors (VCMs) for enhancing user experiences with unique haptics waveforms. The haptics suite for these devices include resonance frequency calibration at the system level for the LRA; output voltage and current monitoring software triggered haptics actuator impedance and resonance frequency reporting; pre-stored haptics waveforms that can be triggered by I2C/GPI for gaming applications and user interface events; and flexible haptics waveform generation that can be triggered by GPI for home button or side button switch replacement. Cirrus Logic’s haptics technology also features closed loop algorithms to maximize LRA effectiveness. This software approach enables strong and consistent haptics; protection of the LRA from over-excursion; and provides for overall long-term reliability of the LRA.

Features

• Low latency for real time control of the haptics motor
  • Always-on listening to haptics trigger
  • Reduce time from trigger to achieving desired acceleration on the LRA
  • Wakeup from AoH hibernate mode in 5 ms
  • <20 μA AoH hibernation
  • Provides performance consistency over voltage, temperature and external factors. No loss of acceleration strength of the LRA
• Haptics driver features
  • 1↑∨ amplifier supply voltage MAX for fast startup and braking
  • Short circuit protection
  • Compatible with LRA impedances as low as 6Ω
  • Class D architecture with adaptive output stage reduces idle power consumption, switching loses
• Programmable DSP
  • Run real-time algorithms with reduced latency and reduced integration effort
  • Larger memory for more haptics effects
  • Eliminates complicated integration across platforms for running Audio 2 Haptics
• Programmable Effects
  • Easily design new haptics effects for UI/alerts/button replacement with state-of-the-art tools
• Crisp, clean haptics performance
  • Can overdrive the motor for strong performance
  • Stopping the LRA immediately for crisp haptics with no ringing/buzzy effects
• Closed Loop Control for Strong Haptics Effects and ForceSensitive Interface
  • Button replacement and enable new user experience
  • Localized haptics
• Simplified Tuning
  • Almost like plug and play
  • Algorithm dynamically handles changes in actuator characteristics to eliminate the need to fine tune for long hours
• Class H digital boost converter
  • 85% overall efficiency boost
  • Programmable boost voltages up to 11 V
  • High bandwidth digital control loop
  • 2 MHz switching frequency
  • Pulse skipping mode for improved efficiency during low power quiescent operation
• System protection
  • IC thermal self-protection against over temperature
  • Battery rail reactive brownout system protection
  • Speaker current sensing via integrated current monitoring sense resistor
• Benefits of Closed Loop Algorithms
  • Strong haptics performance
  • Consistent haptics performance
  • LRA protection from over excursion
  • Long-term LRA reliability

Applications

• Virtual buttons
• Audio-2-haptics applications
• Smartphones
• Wearables
• PCs
• Gaming
• Automotive