Boosted Hybrid Class D Amplifier With Integrated Dual LED Drivers

The CS35L32 is a boosted 5 V nominal mono hybrid Class D speaker amplifier that combines the benefits of both linear and switching amplifier technologies. The IC’s offers best-in-class idle power consumption and low radiated emission while maintaining high output power efficiency and superior audio. Automatic Class G operation uses a boosted supply to the speaker to provide battery savings and higher crest factor audio capability. In addition, the battery voltage, speaker voltage and speaker current signals are monitored, digitized and serialized over an I²S bus.

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Audio Amplifiers

Application Categories

Mobile Audio Devices, Speakers


  • Two-level Class G operation, 5 V boosted or battery bypass√Integrated, programmable dual LED drivers
  • I²S real-time speaker current and voltage monitoring
  • One differential analog input
  • Pop suppression, zero crossing detect transitions
  • Speaker protection
  • 30-ball WLCSP package

Parametric Specifications

Description Boosted Class D Amp + Dual LED Drivers
Vout(V)-Max 5
Output Power (W) @1% THD+N, into 8 ohm 1.5
Boost Class G
Channels Mono
Inputs I²S;
Supply (V) 3-5.25
Idle Power Consumption (mW) 18.3
Idle Noise (uV) 25
Size (mm²) 5.68
Package 30 WLCSP
Pitch (mm) 0.4

Press Releases


Jul 31

Cirrus Logic CS35L32 Boosted Class D Amplifier Featured in LG's New Premium Smartphone, LG G3

Analog Class D Amplifier with Boost Converter and Proprietary Embedded Software Delivers Louder, Clearer Audio Output in LG G3 Smartphone's Class-Leading 1W Speaker



Comprehensive Solutions