CS35L01-CWZR

Audio Amplifiers Overview

The CS35L01-CWZR is a mono Class-D audio amplifier with Hybrid Class-D architecture and low idle current. It operates on a supply voltage of 2.5V to 5.5V within an ambient temperature range of -10°C to +70°C. The device delivers up to 3.0W into a 4Ω load at 10% THD+N, or 1.7W into an 8Ω load at 10% THD+N. It features a default gain of +6dB, 97dB A-weighted SNR, and 0.02% THD+N at 1W in SD/HD modes. Packaged in a 9-ball WLCSP measuring 1.2mm x 1.2mm.

Audio Amplifiers Feature Summary

• Filterless Hybrid Class-D architecture supporting four operational modes: Standard Class-D (SD), Reduced Frequency Class-D (FSD), Hybrid Class-D (HD), and Reduced Frequency Hybrid Class-D (FHD).
• Advanced closed-loop modulation providing high signal-to-noise ratio and low total harmonic distortion plus noise.
• Integrated protection mechanisms including automatic recovery for output short-circuits and thermal overload.
• Pop and click suppression capabilities to minimize audible artifacts during power-up and power-down sequences.

Audio Amplifiers Applications

• Mobile Phones
• Laptops, Netbooks, and Tablets
• Portable Navigation Devices
• Active Speakers
• Portable Gaming

Audio Amplifiers Procurement Notes

Verify the specific part number suffix against official documentation to confirm package type and gain configuration. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the component meets the required operating temperature range for the intended application environment before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component for applications requiring high efficiency and minimal external components. Choose between CS35L01 (+6dB gain) and CS35L03 (+12dB gain) based on input signal levels. Utilize HD or FHD modes to reduce idle power consumption and EMI, while SD mode offers full bandwidth performance. Ensure VBATT exceeds 3.0V for Hybrid mode operation.

Audio Amplifiers Part Context

The CS35L01 belongs to the CS35L01/CS35L03 family of 3.0W mono amplifiers from Cirrus Logic. These devices share pin-compatible 9-ball WLCSP packages, facilitating easy upgrades between different gain configurations. They are designed for mobile and portable electronics where space and power efficiency are critical constraints.

Audio Amplifiers Replacement Considerations

The CS35L03-CWZR is a pin-compatible alternative within the same family, offering a +12dB default gain compared to the CS35L01's +6dB. Designers should verify if the higher gain aligns with their system's input requirements before substituting.

Audio Amplifiers FAQ

What determines the operational mode of the CS35L01?

The operational mode (SD, FSD, HD, or FHD) is determined by the logic states of the MODE pin and the connection of the LFILT+ pin to either VBATT or ground via a capacitor.

Can the CS35L01 operate in Hybrid modes without an output filter?

Yes, the device features a filterless architecture. However, for HD and FHD modes, the capacitance connected to the LFILT+ net must not exceed 4.7µF to ensure proper rail voltage transition.