NCP2820_13 Datasheet, PDF (1/21 Pages) ON Semiconductor – Filterless Class-D Audio Power Amplifier

NCP2820 Series
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. With zero pop and click noise performance
NCP2820A turns on within 1 ms versus 9 ms for NCP2820 version.
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%
• Ultra Fast Start−up Time: 1 ms for NCP2820A Version
• 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
• “Pop and Click” Noise Protection Circuitry
• NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
• These are Pb−Free Devices
Applications
• Cellular Phone
• Portable Electronic Devices
• PDAs and Smart Phones
• Portable Computer
http://onsemi.com
MARKING
DIAGRAMS
1
A3
A1
9−PIN FLIP−CHIP CSP
FC SUFFIX
CASE 499AL
C1
xx = AQ for NCP2820
= BD for NCP2820A
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
8
1
8 PIN UDFN 2x2.2
MU SUFFIX
CASE 506AV
1
xx MG
xx = ZB for NCP2820
= AT for NCV2820
M = Date Code
G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information on page 19 of
this data sheet.
Audio
Input
R_i
from
R_i
DAC
Input from
Microcontroller
VP
INP
INM
SD
Cs
OUTM
OUTP
R_i
1.6 mm
R_i
GND
Cs
3.7 mm
© Semiconductor Components Industries, LLC, 2013
1
December, 2013 − Rev. 8
Publication Order Number:
NCP2820/D