LPA2150 Datasheet, PDF (1/11 Pages) Lowpower Semiconductor inc – Unique Modulation Scheme Reduces EMI Emissions

Preliminary Datasheet LPA2150
2×3Walts Stereo Class-D Audio Power Amplifier
General Description
The LPA2150 is a high efficiency, 2x3.0W class-D audio power
amplifier. A new developed filter less PWM modulation architecture
further reduces EMI and THD+N, as well as eliminates the LC
output filter, reducing external component count, sys cost, and
simplifying design.
Operating in a single 5V supply, LPA2150 is capable of driving 4Ω
speaker load at a continuous average output of 3.05W/10%
THD+N or 2.6W/1% THD+N. The LPA2150 has high efficiency
with speaker load compared to a typical class D amplifier. With a
3.6V supply driving an 8Ω speaker, the efficiency for a 400mW
power level is 90%.In cellular handsets, the earpiece, speaker
phone, and melody ringer can each be driven by the LPA2150.
The gain of LPA2150 is externally configurable which allows
independent gain control from multiple sources by summing
signals from separate sources.
The LPA2150 is available in space-saving SOP16 packages.
Order Information
LPA2150
□□ □
F: Pb-Free
Features
 Unique Modulation Scheme Reduces EMI Emissions
 Efficiency at 3.6V With an 8-Ω Speaker:
 − 90% at 400 mW
 − 82% at 100 mW
 Low 2.5mA Quiescent Current
 0.5µA Shutdown Current
 2.5V to 6V Wide Supply Voltage
 Shutdown Pin has 1.8V Compatible Thresholds
 Optimized PWM Output Stage Eliminates LC Output Filter
 Improved PSRR (−80 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 750kHz Switching Frequency
 Integrated Pop and Click Suppression Circuitry
 SOP16 Packaging
 RoHS compliant and 100% lead(Pb)-free
Typical Application Circuit
Package Type
SO: SOP16
Applications
 PDA/DSC
 Portable Audio Speaker
 Cellular and Smart mobile phone
 Bluetooth Speaker
Marking Information
Device
Marking
Package
LPA2150
LPS
SOP16
LPA2150
YWX
Y:Year code. W:Week code. X:Batch number.
Shipping
3K/REEL
LPA2150–00 May.-2013
Email: [e-mail]
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