© Semiconductor Components Industries, LLC, 2009

October, 2009 − Rev. 2

1

Publication Order Number:

NCP2811/D

NCP2811

NOCAPt Advanced Stereo

Headphone Amplifier

NCP2811 is a dual audio power amplifier designed for portable

communication device applications such as mobile phones. This part

is capable of delivering 27 mW of continuous average power into a

16

Ω load from a 2.7 V power supply with a THD+N of 1%.

Based on the power supply delivered to the device, an internal

power management block generates a symmetrical positive and

negative voltage. Thus, the internal amplifiers provide outputs

referenced to Ground. In this True Ground configuration, the two

external heavy coupling capacitors can be removed. It offers

significant space and cost savings compared to a typical stereo

application.

NCP2811 is available with an external adjustable gain (version A),

or with an internal gain of −1.5 V/V (version B). It reaches a superior

−100 dB PSRR and noise floor. Thus, it offers high fidelity audio

sound, as well as a direct connection to the battery. It contains circuitry

to prevent from “Pop & Click” noise that would otherwise occur

during turn−on and turn−off transitions. The device is available in 12

bump CSP package (2 x 1.5 mm) which help to save space on the

board. It is also available in WQFN12 and TSSOP−14 packages.

Features

Capacitors:

− Save Board Area

− Save Component Cost

− No Low−Frequency Response Attenuation

Compliant

Typical Applications

− Cellular Phones

− MP3 Player

− Personal Digital Assistant and Portable Media Player

− Portable Devices

http://onsemi.com

See detailed ordering and shipping information on page 12 of

this data sheet.

ORDERING INFORMATION

WQFN12

MT SUFFIX

CASE 510AH

1

2811x

ALYWG

G

(Note: Microdot may be in either location)

2811x

AYWW

G

x

= A for NCP2811A

= B for NCP2811B

A

= Assembly Location

Y

= Year

WW = Work Week

G

= Pb−Free Package

TSSOP−14

DTB SUFFIX

CASE 948G

12 PIN CSP

FC SUFFIX

CASE 499AZ

MARKING

DIAGRAMS

1

14

2811

x

ALYWG

G

1

14

x

= A for NCP2811A

= B for NCP2811B

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

x

= A for NCP2811A

= B for NCP2811B

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package