NCP2823_11 Datasheet, PDF (1/11 Pages) ON Semiconductor – High Efficiency 3W Filterless Class D Audio Amplifier

NCP2823 Series
High Efficiency 3W
Filterless Class D Audio
Amplifier
The NCP2823A/B are cost effective mono audio power amplifiers
designed for portable electronic devices. NCP2823A is optimized for
8 W operation and NCP2823B can operate with speaker impedance
down to 4.0 W. For Instance, NCP2823B is capable of delivering 3 W
of continuous average power to a 4.0 W from a 5.0 V supply in a
Bridge Tied Load (BTL) configuration. Under the same conditions,
NCP2823A can provide 1.5 W to an 8.0 W BTL load with less than
10% THD+N. For cellular handsets or PDAs it offers space and cost
savings because no output filter is required when using inductive
transducers. With more than 90% efficiency and very low shutdown
current, it increases the lifetime of your battery and drastically lowers
the junction temperature.
NCP2823 processes analog inputs with a pulse width modulation
technique that lowers output noise and THD. The device allows
independent gain while summing signals from various audio sources.
Thus, in cellular handsets, the earpiece, the loudspeaker and even
melody ringer can be driven with a single NCP2823. Due to its low
26 mV noise floor, A−weighted, clean listening is guaranteed no matter
the load sensitivity.
Features
• Optimized PWM Output Stage: Filterless Capability
• Externally gain setting
• Low consumption: 1.8 mA for NCP2823A
• High efficiency: up to 92%
• Large Output Power Capability:
3 W @ V_P = 5.0 V, R_L = 4 W, THD+N < 10%
3 W @ V_P = 5.5 V, R_L = 4 W, THD+N < 1%
• High PSRR: up to −77 dB
• Fully Differential Capability: RF immunity
• Thermal and Auto recovery Short−Circuit Protection
• CMRR (−80 dB) Eliminates Two Input Coupling Capacitors
• Pin to Pin compatible with NCP2820 Flip−Chip
• These Devices are Pb−Free and are RoHS Compliant
Typical Applications
• Audio Amplifier for
♦ Cellular Phones
♦ Digital Cameras
♦ Personal Digital Assistant and Portable Media Player
♦ GPS
http://onsemi.com
MARKING
DIAGRAM
9−PIN FLIP−CHIP CSP _XXXG
FC SUFFIX
AYWW
1
CASE 499AL
A1
XXX
A
Y
WW
G
= QTA for NCP2823A
= PMA for NCP2823B
= TPG for NCP2823A
with backside laminate
= Assembly Location
= Year
= Work Week
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information on page 10 of
this data sheet.
1.45 mm
3.7 mm
© Semiconductor Components Industries, LLC, 2011
1
January, 2011 − Rev. 2
Publication Order Number:
NCP2823/D