LM48510 - Boosted Class D Audio Power Amplifier from the PowerWise® Family

Datasheet Packaging Samples & Pricing Eval. Boards Reliability Application Notes Knowledge Base

Features
•Click and Pop Suppression
•Low 0.01μA Shutdown Current
•76% Efficiency
•Filterless Class D
•2.7V - 5.0V operation (VDD)
•Externally configurable gain on Class D
•Very fast turn on time: 17μs
•Independent Boost and Amplifier shutdown pins

Key Specification

■  Quiescent Power Supply Current 6mA (typ)
■  Output Power  (RL = 8Ω, THD+N ≤ 1%,  VDD = 3.3V, PV1 = 5.0V) 1.2W (typ)
■  Shutdown Current 0.01μA (typ)

General Description

The LM48510 integrates a boost converter with a high efficiency mono, Class D audio power amplifier to provide 1.2W continuous power into an 8Ω speaker when operating on a 3.3V power supply with boost voltage (PV1) of 5.0V. More...


Applications

•Mobile Phones
•PDAs
•Portable media
•Cameras
•Handheld games
  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Power@ 8Ohms, 1% THD 1.2 Watt
Power@ 8Ohms, 10% THD 1.55 Watt
THD 0.07 %
THD Conditions Pout=500mW,Vdd=3.3v
Power@ 8Ohms, 1% THD 1.2 Watt
Power@ 8Ohms, 10% THD 1.55 Watt
THD 0.07 %
THD Conditions Pout=500mW,Vdd=3.3v
User Supply 3.3 Volt
Shut down Yes
Shutdown Type Low
Supply Range +2.7 - +5.5 V
Temperature Min -40 deg C
Temperature Max 85 deg C
PowerWise Yes
View Using Catalog


Typical Performance

click for larger image


  Additional Resources
Application Notes (see below)


Connection Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM48510 Boosted Class D Audio Power Amplifier 404 Kbytes 15-Oct-07 Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM48510SDBDBoosted Class D Audio Power AmplifierFull productionN/A
 
Buy Now 		1+$100.001-
N/AN/A
LM48510SDELLP16NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.35reel
of
250		NS
UZXYTT
L48510
16 weeksN/A
LM48510SDLLP16NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.35reel
of
1000		NS
UZXYTT
L48510
6 weeksN/A
LM48510SDXLLP16STD
NOPB		1
1		260
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.35reel
of
4500		NS
UZXYTT
L48510
16 weeksN/A

General Description

The LM48510 integrates a boost converter with a high efficiency mono, Class D audio power amplifier to provide 1.2W continuous power into an 8Ω speaker when operating on a 3.3V power supply with boost voltage (PV1) of 5.0V. When operating on a 3.3V power supply, the LM48510 is capable of driving a 4Ω speaker load at a continuous average output of 1.7W with less than 1% THD+N. The Class D amplifier is a low noise, filterless PWM architecture that eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design.

The LM48510's switching regulator is a current-mode boost converter operating at a fixed frequency of 0.6MHz.

The LM48510 is designed for use in mobile phones and other portable communication devices. The high (76%) efficiency extends battery life when compared to Boosted Class AB amplifiers. The LM48510 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).

The gain of the Class D is externally configurable which allows independent gain control from multiple sources by summing the signals. Output short circuit and Thermal shutdown protection prevent the device from damage during fault conditions. Superior click and pop suppression eliminates audible transients during power-up and shutdown.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM48510SDCMOS7016561009540004270700104
LM48510SDECMOS7016561009540004270700104
LM48510SDXCMOS7016561009540004270700104

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1614: Application Note 1614 LM48510 Speaker Application Note 214 Kbytes 14-Aug-07 Download
AN-1614 (Chinese): Application Note 1614 LM48510 Speaker Application Note
 295 Kbytes  

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More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1922: Application Note 1922 LM48511 Evaluation Board User`s Guide 1586 Kbytes 5-Nov-08 Download
AN-1737: Application Note 1737 Managing EMI in Class D Audio Applications 183 Kbytes 2-Nov-07 Download
AN-1737 (Japanese): Application Note 1737 Managing EMI in Class D Audio Applications
 178 Kbytes   Download
AN-1737 (Chinese): Application Note 1737 Managing EMI in Class D Audio Applications
 302 Kbytes  

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[Information as of 3-Jul-2009]