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WM9010

Low Power, Class G Stereo Headphone Driver

WOLFSON MICROELECTRONICS plc

Production Data, February 2011, Rev 4.0

Copyright

©2011 Wolfson Microelectronics plc

DESCRIPTION

The WM9010 is a low power stereo headphone driver designed

for mobile handset and portable media player (PMP)

applications. Class G amplifier technology is used to achieve

high power efficiency and low quiescent current.

Stereo analogue inputs accept 1Vrms line level inputs; the Hi-Fi

output drivers deliver up to 28mW into a 32Ω load.

An integrated charge pump circuit generates split-rail voltage

supplies to power the ground-referenced headphone driver.

The WM9010 incorporates Wolfson Silent Switch™ technology

to provide pop and click suppression whenever the WM9010 is

enabled or disabled.

The WM9010 is supplied in a 12-pin CSP package.

FEATURES

•

Hi-fi audio headphone drivers (104dB SNR - ‘A’ weighted)

•

Stereo analogue audio inputs

•

Ground-referenced, cap-less headphone outputs

•

Integrated charge pump and oscillator circuits

•

Low quiescent current

•

RF noise suppression

•

Pop and click suppression

•

12-pin CSP package (1.84 x 1.34 x 0.7mm)

APPLICATIONS

•

Mobile Handsets

•

Portable Media Players (PMP)

•

Notebooks / Laptop computers

•

LCD televisions

INL

INR

HPOUTL

HPOUTR

ENA

GND

VDD

WM9010

Charge Pump

Oscillator

Pop and click

suppression

RF noise

suppression

INREF

-

+

-

+