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NCP2821 Datasheet(Fiches technique) 1 Page - ON Semiconductor

Numéro de pièce NCP2821
Description  2.65 W Filterless with Selectable Gain Class−D Audio Amplifier
Télécharger  19 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 2006
February, 2006 − Rev. 0
1
Publication Order Number:
NCP2821/D
NCP2821
2.65 W Filterless with
Selectable Gain Class−D
Audio Amplifier
NCP2821 is a cost effective mono audio power amplifier designed
for portable communication device applications such as mobile
phones. The internal gain setting between 6 dB and 12 dB will also
save external gain setting resistors. To achieve a typical audio mono
application, you only need an external capacitor for filtering the power
supply. The NCP2821 processes analog inputs with a PWM technique
that lowers significantly output noise and THD.
This part is capable of delivering 2.65 W of continuous average
power to a 4.0
W BTL load from a 5.0 V power supply. Operating on a
single 3 V supply, the output power stage can provide 500 mW to an
8.0
W BTL load with less than 1% THD+N. For cellular handsets or
PDAs it offers space and cost savings because no output filter is
required when using inductive transducers. Its improved Class−D
technology makes it suitable for portable devices. With 90%
efficiency and very low shutdown current, it increases widely the
lifetime of your battery compared to a ClassAB solution. It also
minimizes the junction temperature.
It fully rejects “pop & click” noises with a fast start−up time of 9 ms.
Added to a −65 dB PSRR, the NCP2821 audio power amplifier is
specifically designed to provide high quality output power from low
supply voltage, requiring only 1 external capacitor.
Features
Optimized PWM Output Stage: Filterless Capability
Selectable Gain of 6 dB or 12 dB: No Need for External Gain Setting
Resistors
Efficiency up to 90% and Low Quiescent Current
Maximum Battery Life and Minimum Heat
High Output Power Capability: 1.4 W with 8.0 W Load
Wide Supply Voltage Range: 2.5−5.5 V Operating Voltage
High Performance, THD+N of 0.05%
Excellent PSRR (−65 dB): No Need for Voltage Regulation
Surface Mounted Package 9−Pin Flip−Chip CSP
Fully Differential Capability: No Need for Input Coupling Capacitor
Very Fast Turn On Time: 9.0 ms (typ)
“Pop and Click” Noise Protection Circuitry
Applications
Cellular Phone
Personal Computer
PDAs
Portable Electronic Devices
http://onsemi.com
9−PIN FLIP−CHIP CSP
FC SUFFIX
CASE 499AL
1
MARKING
DIAGRAM
MAU = Device Code
A
= Assembly Location
Y
= Year
WW
= Work Week
G
= Pb−Free Package
MAU
G
AYWW
A1
OUTM
OUTP
1
mF
GND
SD
INP
INM
VP
Input from
Micro
controller
Audio
Input
from
DAC
2.7 mm
1.6 mm
Solution Size
Cs
See detailed ordering and shipping information on page 18 of
this data sheet.
ORDERING INFORMATION
PIN CONNECTIONS
9−Pin Flip−Chip CSP
A3
B3
C3
A2
B2
C2
A1
B1
C1
GS
INP
OUTM
VP
SD
OUTP
GND
INM
VP
(Top View)
GS




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