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 ꢀ 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 ꢀ 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
http://onsemi.com
MARKING
DIAGRAMS
A3
A1
1
9−PIN FLIP−CHIP CSP
1
FC SUFFIX
CASE 499AL
C1
8
1
ZB MG
1
42ꢁ ꢂV noise floor, A−weighted, a clean listening is guaranteed no
matter the load sensitivity.
8 PIN UDFN 2x2.2
MU SUFFIX
Features
CASE 506AV
• Optimized PWM Output Stage: Filterless Capability
• Efficiency up to 90%
A
Y
= Assembly Location
= Year
Low 2.5 mA Typical Quiescent Current
• Large Output Power Capability: 1.4 W with 8.0 ꢀ Load (CSP) and
THD + N < 1%
WW = Work Week
M
G
= Date Code
= Pb−Free Package
• Wide Supply Voltage Range: 2.5−5.5 V Operating Voltage
• High Performance, THD+N of 0.03% @ V = 5.0 V,
p
R = 8.0 ꢀ, P = 100 mW
L
out
• 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
ORDERING INFORMATION
See detailed ordering and shipping information on page 20 of
this data sheet.
• Very Fast Turn On/Off Times with Advanced Rising and Falling
Cs
Gain Technique
• External Gain Configuration Capability
• Internally Generated 250 kHz Switching Frequency
VP
Audio
Input
from
R
R
i
i
INP
INM
OUTM
OUTP
• Short Circuit Protection Circuitry
DAC
• “Pop and Click” Noise Protection Circuitry
• Pb−Free Packages are Available
SD
Input from
Microcontroller
Applications
• Cellular Phone
GND
• Portable Electronic Devices
• PDAs and Smart Phones
• Portable Computer
Cs
R
R
i
i
1.6 mm
3.7 mm
© Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
November, 2006 − Rev. 5
NCP2820/D