LM49100 - Mono Class AB Audio Sub-System with a True-Ground Headphone Amplifier

Datasheet Packaging Samples & Pricing Eval. Boards Knowledge Base

Features
•Mono and stereo inputs
•Thermal Overload Protection
•True-ground Headphone Drivers
•I 2C Control Interface
•Input mute attenuation
•2nd Stage headphone attenuator
•32-step digital volume control
•10 Operating Modes
•Minimum external components
•Click and Pop suppression
•Micro-power shutdown
• Available in space-saving 3mm x 3mm 25 bump GR package
•RF Suppression

Key Specification

■  Power Output at VDD = 5V:    Loudspeaker (LS):  RL = 8Ω, THD+N ≤ 1% 1.275W
   Headphone (VDDHP = 2.8V):  RL = 32Ω, THD+N ≤ 1% 50mW
■  Shutdown current 0.01µA

General Description

The LM49100 is a fully integrated audio subsystem capable of delivering 1.275W of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and with a 5V power supply. More...


Applications

•Mobile Phones
•PDAs
•Laptops
•Portable Electronics
  Typical Application
*click for larger image


Parametric Table     expand
Parametric Table    collapse
Power@ 8Ohms, 10% THD 0.525 Watt
Power@ 8Ohms, 1% THD 0.425 Watt
THD 0.2 %
PSRR 90 dB
Channels 3 Channels
THD Conditions Headphone mode 4, f=1kHz, RL=32ohm, Pout=25mW
THD Conditions Headphone mode 4, f=1kHz, RL=32ohm, Pout=25mW
PSRR Conditions LS, Modes 1, 2, 10
PSRR Conditions LS, Modes 1, 2, 10
Power@ 8Ohms, 10% THD 0.525 Watt
Power@ 8Ohms, 1% THD 0.425 Watt
THD 0.2 %
PSRR 90 dB
Channels 3 Channels
THD Conditions Headphone mode 4, f=1kHz, RL=32ohm, Pout=25mW
PSRR Conditions LS, Modes 1, 2, 10
User Supply 3.6 Volt
Capless Headphone No
ClassD Driver No
Interface I2C
Stereo Inputs 2
Digital Volume Control Max 18 dB
Digital Volume Control Min -54 dB
Output Modes 10
Supply Range +2.7 - +5.5 V
Mono Inputs 2
Temperature Min -40 deg C
Temperature Max 85 deg C
Loudspeaker Type Class AB
Headphone Type True Ground
Loudspeaker Outputs 2
View Using Catalog


Typical Performance

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  Connection Diagram
*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM49100 Mono Class AB Audio Sub-System with a True-Ground Headphone Amplifier 2132 Kbytes 26-Sep-07 View Online
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
LM49100GREVALMono Class AB Audio Subsystem with a True-Ground Headphone AmplifierPreliminaryN/A
 
Buy Now 		 CALLN/A-
N/AN/A
LM49100GRMICRO-ARRAY25NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$3.35reel
of
1000		XYTT
GC9
6 weeks2000

General Description

The LM49100 is a fully integrated audio subsystem capable of delivering 1.275W of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and with a 5V power supply. The LM49100 also has a stereo true-ground headphone amplifier capable of 50mW per channel of continuous average power into a 32Ω single-ended (SE) loads with 1% THD+N.

The LM49100 has three input channels. One pair of SE inputs can be used with a stereo signal. The other input channel is fully differential and may be used with a mono input signal. The LM49100 features a 32-step digital volume control and ten distinct output modes. The mixer, volume control, and device mode select are controlled through an I 2C compatible interface.

Thermal overload protection prevent the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown.

Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1622: Application Note 1622 LM49100 Evaluation Board User's Guide 1237 Kbytes 19-Oct-07 Download

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[Information as of 20-Nov-2008]