NCP9004 Datasheet, PDF (1/17 Pages) ON Semiconductor – 2.65 W Filterless Class−D Audio Power Amplifier

NCP9004
2.65 W Filterless Class−D
Audio Power Amplifier
The NCP9004 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 NCP9004 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 NCP9004. Due to its low
42 mV noise floor, A−weighted, a clean listening is guaranteed no
matter the load sensitivity.
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MARKING
DIAGRAM
9−PIN FLIP−CHIP CSP
FC SUFFIX
1
CASE 499E
MAQG
AYWW
1
MAQ = Device Code
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
9−Pin Flip−Chip CSP
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 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 CSP (SnPb and Pb−Free)
• 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
Applications
• Cellular Phone
• Portable Electronic Devices
• PDAs and Smart Phones
• Portable Computer
A1
A2
A3
INP GND 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 16 of
this data sheet.
Cs
Audio
Input
R_i
from
R_i
DAC
Input from
Microcontroller
VP
INP
INM
SD
OUTM
OUTP
R_i
1.6 mm
R_i
GND
Cs
3.7 mm
Solution Size
© Semiconductor Components Industries, LLC, 2006
1
August, 2006 − Rev. 2
Publication Order Number:
NCP9004/D