Preliminary Datasheet

LPA2150

LPA2150–00

May.-2013

www.lowpowersemi.com

Page 1 of 11

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

Package Type

SO: SOP16

Applications



PDA/DSC



Portable Audio Speaker



Cellular and Smart mobile phone



Bluetooth Speaker

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

Marking Information

Device

Marking

Package

Shipping

LPA2150

LPS

LPA2150

YWX

SOP16

3K/REEL

Y:Year code. W:Week code. X:Batch number.