EUA2045 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – Non-Clip, Low EMI, 2.8W Mono Filterless Class-D Audio Power Amplifier with Auto-Recovery

EUA2045
Non-Clip, Low EMI, 2.8W Mono Filterless Class-D
Audio Power Amplifier with Auto-Recovery
DESCRIPTION
The EUA2045 is a high efficiency, 2.8W mono class-D
audio power amplifier with non-clip. A low noise, filterless
PWM architecture eliminates the output filter, reducing
external component count, system cost, and simplifying
design.
Operating in a single 5V supply, EUA2045 is capable of
driving 4Ω speaker load at a continuous average output of
2.8W/10% THD+N or 2.2W/1% THD+N. The EUA2045
has high efficiency with speaker load compared to a typical
class AB amplifier. With a 3.6V supply driving an 8Ω
speaker , the efficiency for a 400mW power level is 84%.
EUA2045 feature non-clip output control function which
detects output signal clip due to the over level input signal
and suppress the output signal clip automatically. Also the
non-clip output control function can adapt the output clip
cause by power supply voltage down with battery.
In cellular handsets, the earpiece, speaker phone, and
melody ringer can each be driven by the EUA2045.
The EUA2045 is available in space-saving WCSP and
TDFN-8 packages.
FEATURES
Unique Modulation Scheme Reduces EMI Emissions
Unique Non-Clip function , Variable NCN1,
NCN2,NCNOFF mode Select
Short Circuit Auto-Recovery
Efficiency at 3.6V With an 8-Ω Speaker:
− 84% at 400 mW
Low Quiescent Current and
Shutdown Current
2.5V to 5.5V Wide Supply Voltage
Shutdown Pin Compatible with 1.8V Logic GPIO
Optimized PWM Output Stage Eliminates
LC Output Filter
Improved PSRR ( -68 dB) Eliminates Need for a
Voltage Regulator
Fully Differential Design Reduces RF Rectification
and Eliminates Bypass Capacitor
Improved CMRR Eliminates Two Input
Coupling Capacitors
Internally Generated 325-kHz Switching
Frequency
Integrated Pop and Click Suppression Circuitry
1.5mm × 1.5mm Wafer Chip Scale Package (WCSP)
and 3mm × 3mm TDFN-8 Package
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
Typical Application Circuit
APPLICATIONS
Ideal for Wireless or cellular Handsets and PDAs
DS2045 Ver 0.1 Mar. 2012
Figure1.
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