NCP2820
2.65 W Filterless Class−D
Audio Power Amplifier
The NCP2820 is a cost−effective mono Class−D audio power
amplifier capable of delivering 2.65 W of continuous average power
to 4.0
W
from a 5.0 V supply in a Bridge Tied Load (BTL)
configuration. Under the same conditions, the output power stage can
provide 1.4 W to a 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 tranducers. With more
than 90% efficiency and very low shutdown current, it increases the
lifetime of your battery and drastically lowers the junction
temperature.
The NCP2820 processes analog inputs with a pulse width
modulation technique that lowers output noise and THD when
compared to a conventional sigma−delta modulator. The device allows
independent gain while summing signals from various audio sources.
Thus, in cellular handsets, the earpiece, the loudspeaker and even the
melody ringer can be driven with a single NCP2820. Due to its low
42
mV
noise floor, A−weighted, a clean listening is guaranteed no
matter the load sensitivity.
Features
http://onsemi.com
MARKING
DIAGRAMS
1
9−PIN FLIP−CHIP CSP
1
FC SUFFIX
CASE 499AL
A1
MAQG
AYWW
C1
A3
8
1
8 PIN UDFN 2x2.2
MU SUFFIX
CASE 506AV
1
ZB MG
•
Optimized PWM Output Stage: Filterless Capability
•
Efficiency up to 90%
•
•
•
•
•
•
•
•
•
•
•
•
Pb−Free Packages are Available
Applications
Low 2.5 mA Typical Quiescent Current
Large Output Power Capability: 1.4 W with 8.0
W
Load (CSP) and
THD + N < 1%
Wide Supply Voltage Range: 2.5−5.5 V Operating Voltage
High Performance, THD+N of 0.03% @ V
p
= 5.0 V,
R
L
= 8.0
W,
P
out
= 100 mW
Excellent PSRR (−65 dB): No Need for Voltage Regulation
Surface Mounted Package 9−Pin Flip−Chip CSPand UDFN8
Fully Differential Design. Eliminates Two Input Coupling Capacitors
Very Fast Turn On/Off Times with Advanced Rising and Falling
Gain Technique
External Gain Configuration Capability
Internally Generated 250 kHz Switching Frequency
Short Circuit Protection Circuitry
“Pop and Click” Noise Protection Circuitry
A
Y
WW
M
G
= Assembly Location
= Year
= Work Week
= Date Code
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information on page 20 of
this data sheet.
Cs
Audio
Input
from
DAC
R
i
R
i
INP
INM
SD
VP
OUTM
OUTP
Input from
Microcontroller
•
•
•
•
Cellular Phone
Portable Electronic Devices
PDAs and Smart Phones
Portable Computer
GND
Cs
R
i
1.6 mm
R
i
3.7 mm
©
Semiconductor Components Industries, LLC, 2006
November, 2006
−
Rev. 5
1
Publication Order Number:
NCP2820/D
ONSEMI [ ON SEMICONDUCTOR ]
