NCP2821 Datasheet, PDF (1/19 Pages) ON Semiconductor – 2.65 W Filterless with Selectable Gain Class−D Audio Amplifier

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
MARKING
DIAGRAM
9−PIN FLIP−CHIP CSP _MAUG
FC SUFFIX
AYWW
1
CASE 499AL
A1
MAU = Device Code
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
9−Pin Flip−Chip CSP
A1
A2
A3
INP
GS OUTM
B1
B2
B3
VP
VP
GND
C1
C2
C3
INM
SD
OUTP
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information on page 18 of
this data sheet.
Audio
Input
from
DAC
Input from
Micro
controller
VP
INP
INM
GS
SD
1 mF
OUTM
OUTP
GND
Cs
1.6 mm
© Semiconductor Components Industries, LLC, 2006
1
February, 2006 − Rev. 0
2.7 mm
Solution Size
Publication Order Number:
NCP2821/D