NCP2820 Datasheet, PDF (1/22 Pages) ON Semiconductor – 2.65 W Filterless Class−D Audio Power Amplifier

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
• Optimized PWM Output Stage: Filterless Capability
• Efficiency up to 90%
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
• Pb−Free Packages are Available
Applications
• Cellular Phone
• Portable Electronic Devices
• PDAs and Smart Phones
• Portable Computer
http://onsemi.com
MARKING
DIAGRAMS
A3
1
A1
9−₁PIN FLIP−CHIP CSP
FC SUFFIX
CASE 499AL
C1
8
1
8 PIN UDFN 2x2.2
MU SUFFIX
CASE 506AV
1
ZB MG
A = Assembly Location
Y = Year
WW = Work Week
M = Date Code
G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information on page 20 of
this data sheet.
Audio
Input
R_i
from
R_i
DAC
Input from
Microcontroller
VP
INP
INM
SD
Cs
OUTM
OUTP
GND
R_i
1.6 mm
R_i
Cs
3.7 mm
© Semiconductor Components Industries, LLC, 2006
1
November, 2006 − Rev. 5
Publication Order Number:
NCP2820/D