WM9082 datasheet(1/24 Pages) WOLFSON

부품명	WM9082

상세설명	PDM Input Mono 3W Class D Speaker Driver

PDF	24 Pages

Scroll/Zoom	100%

제조업체	WOLFSON [Wolfson Microelectronics plc]

홈페이지	http://www.wolfsonmicro.com

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WM9082

PDM Input Mono 3W Class D Speaker Driver

WOLFSON MICROELECTRONICS plc

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Production Data, August 2012, Rev 4.1

Copyright

2012 Wolfson Microelectronics plc

DESCRIPTION

The WM9082 is a high-performance sigma-delta Class D

speaker driver. Audio input is supported using a stereo PDM

interface; clock and control-code detection circuitry supports

all of the audio and control functions via a 2-wire interface.

The digital audio interface provides excellent noise

immunity, eliminating traditional input-filtering components.

The flexible 2-wire interface minimises the PCB footprint and

simplifies software development.

The combined audio and control interface configuration is

ideal for enabling the WM9082 to be located close to the

speaker; this reduces the length of the output connections,

giving good EMC performance and removing the need for

output filter components.

The sigma-delta architecture provides good power efficiency

and improved EMI performance with respect to traditional

PWM Class D designs.

A first-order high-pass filter can be selected on the input

signal to remove DC offsets and help to prevent speaker

damage. Other features include a low-power mute state,

and output slew-rate control.

Short-circuit and thermal protection is provided.

The WM9082 is supplied in a 9-ball 1.56 x 1.46mm CSP

package, with 0.5mm ball pitch.

FEATURES

 Sigma-Delta Class-D speaker driver

-

92dB SNR - ‘A’ weighted

-

2.5W into 4

 (5V supply, 1% THD)

-

1.3W into 4

 (3.6V supply, 1% THD)

-

1.25W into 8

 (5V supply, 1% THD)

-

650mW into 8

 (3.6V supply, 1% THD

 Stereo PDM digital audio input

 Supports 32kHz, 44.1kHz, 48kHz sample rates (128fs input)

 Automatic Left/Right channel selection

 First-order high pass filter (HPF)

 RF noise suppression

 Pop and click suppression

 Programmable output slew rates for low EMI

 Short-circuit and thermal protection

 9-ball CSP package

APPLICATIONS

 Mobile Handsets

 Portable Media Players (PMP)

 Notebooks / Laptop computers

 LCD televisions

BLOCK DIAGRAM

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