Cirrus Logic’s New CS35L0x Family 2W Mono Class-D Audio Amplifiers with Low Idle Current
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With the CS35L0x family, Cirrus Logic is entering into the lower power ranges of audio amplification. Aimed at space constrained, low idle current consumption applications, this new family of amplifiers brings Cirrus Logic’s renowned sound quality into play.
Employing innovative amplification and power rail schemes, the CS35L0x devices achieve low noise figures at maximum power efficiencies. The flexible Hybrid Class-D output stage offers four modes of operation: Standard Class-D (SD) mode offers full audio bandwidth and high audio performance; Hybrid Class-D (HD) mode offers a substantial reduction in idle power consumption with an integrated Class-H controller; Reduced Frequency Class-D (FSD) mode reduces the output switching frequency, producing lower electromagnetic interference (EMI); and Reduced Frequency Hybrid Class-D (FHD) mode produces both the lower idle power consumption of HD mode and the reduced EMI benefits of FSD mode.
An advanced closed-loop architecture enables 0.02% THD+N at 1 W and -75 dB PSRR at 217 Hz.
The CS35L00 is a 2.7 W high efficiency Hybrid Class-D audio amplifier with low idle current consumption and a selectable gain, available in a 3.0 mm x 3.0 mm, 10-pin DFN package in Commercial grade (-10°C to +70°C).
The CS35L01 and the CS35L03 rate 2.9W with fixed gain settings (+6dB or +12dB respectively), and are available in a 1.2 mm x 1.2 mm, 9-ball WLCSP package in Commercial grade (-10°C to +70°C).
CS35L00 Features
- Hybrid Class-D Architecture:
- <1 mA Quiescent Current
- 1 x 2.7 W into 4 Ohm (10% THD+N)
- 1 x 2.1 W into 4 Ohm (1% THD+N)
- 1 x 1.6 W into 8 Ohm (10% THD+N)
- 1 x 1.3 W into 8 Ohm (1% THD+N)
- Advanced Closed-loop Modulation
- 98 dB Signal-to-Noise Ratio (A-Weighted)
- 0.02% THD+N @ 1 W (SD & HD Mode)
- Integrated Protection and Automatic Recovery for Output Short-circuit and Thermal Overload
- Thermally Enhanced 10-pin DFN Package with Pin-selectable Gain of +6 dB or +12 dB
- Pop and Click Suppression
CS35L01 & CS35L03 Features
- Filterless Hybrid Class-D Architecture
- <1 mA Quiescent Current
- 1 x 2.9 W into 4 Ohm (10% THD+N)
- 1 x 2.3 W into 4 Ohm (1% THD+N)
- 1 x 1.7 W into 8 Ohm (10% THD+N)
- 1 x 1.4 W into 8 Ohm (1% THD+N)
- Advanced Closed-loop Modulation
- 98 dB Signal-to-Noise Ratio (A-Weighted)
- 0.02% THD+N @ 1 W (SD & HD Mode)
- Integrated Protection and Automatic Recovery for Output Short-circuit and Thermal Overload
- Pin-compatible 9-ball WLCSP family for easy upgrade path
- CS35L01: +6 dB default Gain
- CS35L03: +12 dB default Gain
- Pop and Click Suppression