Haptic drivers target automotive interfaces
Cirrus Logic Inc. is bringing its expertise in consumer and smartphone haptics to automotive applications with its new family of closed-loop haptic drivers. The CS40L51, CS40L52, and CS40L53 devices mark the company’s first haptic driver solutions that are reliability qualified to the AEC-Q100 automotive standard.
The CS40L51/52/53 devices integrate a high-performance 15-V Class D amplifier, boost converter, voltage and current monitoring ADCs, waveform memory, and a Halo Core DSP. In addition to simplifying design, the family’s real-time closed-loop control improves actuator response and expands the frequency bandwidth for improved haptic effects, while the proprietary algorithms dynamically adjust actuator performance, delivering precise and high-definition haptic feedback.
The CS40L51/52/53 haptic drivers are designed to deliver a more immersive and intuitive tactile user experience in a range of in-cabin interfaces, including interactive displays, steering wheels, smart surfaces, center consoles, and smart seats. These devices can operate across varying conditions.
The advanced closed-loop hardware and algorithm improve the response time of the actuator and expand usable frequency bandwidth to create a wider range of haptic effects. Here’s the lineup:
- The CS40L51 offers advanced sensor-less velocity control (SVC), real-time audio to haptics synchronization (A2H), and active vibration compensation (AVC) for immersive, high-fidelity feedback.
- The CS40L52 features the advanced closed-loop control SVC that optimizes the system haptic performance in real-time by reducing response time, increasing frequency bandwidth and compensating for manufacturing tolerances and temperature variation.
- The CS40L53 provides a click compensation algorithm to enable consistent haptic feedback across systems by adjusting haptic effects based on the actuator manufacturing characteristics.
The haptic drivers are housed in a 34-pin wettable flank QFN package. They are AEC-Q100 Grade-2 qualified for automotive applications, with an operating temperature from –40°C to 105°C.
Engineering samples of CS40L51, CS40L52, and CS40L53 are available now. Mass production will start in December 2025. Visit www.cirrus.com/automotive-haptics for more information, including data sheets and application materials.
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