© Semiconductor Components Industries, LLC, 2010
November, 2010 − Rev. 3
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
• True Ground Configuration Output Eliminates DC−Blocking
Capacitors:
− Save Board Area
− Save Component Cost
− No Low−Frequency Response Attenuation
• High PSRR (−100 dB): Direct Connection to the Battery
• “Pop and Click” Noise Protection Circuitry
• Internal Gain (−1.5 V/V) or External Adjustable Gain
• Ultra Low Current Shutdown Mode
• 2.7 V – 5.0 V Operation
• Thermal Overload Protection Circuitry
• CSP 2 x 1.5 mm
• WQFN12 3 x 3 mm
• TSSOP−14
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
• Headset Audio Amplifier for
− 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)
2811xz
AYWW
G
x = A for NCP2811A
= B for NCP2811B
z = C for backside laminate
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
