This article introduces the main features, block diagram, typical application block diagram of WM2002, and recommended external component values and DC1 boost converter and charge pump external component values.
Wolfson's WM2002 is a stereo headphone driver using Wolfson myZoneTM ambient noise cancellation (ANC) technology. It can be configured with single-ended or BTL outputs and supports analog playback or voice input, analog or digital microphones. WM2002 integrates power management, including DC/DC converter, charge pump and LDO regulator, and is powered by a single AAA battery. Ambient noise can be reduced by 25dB (typical value), noise reduction bandwidth (40Hz -4kHz), and BTL-driven THD+N can reach -80dB. It is mainly used in mobile phones with ANC, headphones and Bluetooth mono/stereo mobile phones.
WM2002 applications:
"Pod-style" stereo ear-buds, headsets, headphones with ANC
"Supra-Aural" stereo headphones with ANC
Mono/Stereo Bluetooth headsets with ANC
Figure 1. WM2002 Block Diagram
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Figure 2. WM2002 Typical Application Block Diagram
Figure 3. WM2002 Recommended External Component Values
Figure 4. WM2002 DC1 Boost Converter and Charge Pump External Component Values
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