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	LM4950 - 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier

Features • Pop & click circuitry eliminates noise during turn-on and turn-off transitions • Low current, active-low shutdown mode • Low quiescent current • Stereo 3.1W output, RL = 4 • Mono 7.5W BTL output, RL = 8 • Short circuit protection • Unity-gain stable • External gain configuration capability Key Specification Quiscent Power Supply Current 16mA (typ) POUT (SE)   VDD = 12V, RL = 4, 1% THD+N 3.1W (typ) POUT (BTL)   VDD = 12V, RL = 8, 10% THD+N 7.5W (typ) Shutdown current 40µA (typ) General Description The LM4950 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV's. More... Applications • Flat Panel Monitors • Flat panel TV's • Computer Sound Cards

Typical Application click for larger image Parametric Table     expand Parametric Table    collapse Power@ 4Ohms, 1% THD 3.1 Watt Power@ 8Ohms, 10% THD 3.1 Watt THD 0.14 % PSRR 70 dB THD Conditions Po=2.5Wrms,Av=10,f-1kHz,RL=4 ohm SE PSRR Conditions Vripple=200mVpp,f=1kHz,RL=8 ohm BTL Power@ 4Ohms, 1% THD 3.1 Watt Power@ 8Ohms, 10% THD 3.1 Watt THD 0.14 % PSRR 70 dB Channels 2 Channels THD Conditions Po=2.5Wrms,Av=10,f-1kHz,RL=4 ohm SE PSRR Conditions Vripple=200mVpp,f=1kHz,RL=8 ohm BTL User Supply 12 Volt Supply Range +9.6 - +16 Shut down Yes Shutdown Type Low Mono/Stereo Stereo Temperature Min -40 deg C Temperature Max 85 deg C View Using Catalog Typical Performance click for larger image

Additional Resources Application Notes (see below) Connection Diagram click for larger image

RoHS Compliance Information	Size in Kbytes	Date
LM4950 Boomer ® Audio Power Amplifier Series 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier	1447 Kbytes	18-Aug-04	View Online	Download	Receive via Email

Part Number

Package

Factory Lead Time

Models

Samples & Electronic Orders

Budgetary Pricing

Std Pack Size

Package Marking Format

Type

Pins

Spec.

MSL Rating

Peak Reflow

RoHS Report

CAD Symbols

Weeks

Qty

Qty

$US each

LM4950TA

TO-220

9

NOPB

1

NA

RoHS

Download

Full production

N/A

1K+

$1.10

rail of 45

NSUZXYTT L4950TA

6 weeks

500

LM4950TS

TO-263

9

STD NOPB

3 3

235 245

RoHS

Download

Full production

N/A

1K+

$1.10

rail of 45

NSUZXYTT L4950TS

6 weeks

500

LM4950TSX

TO-263

9

STD NOPB

3 3

235 245

RoHS

Download

Full production

N/A

1K+

$1.10

reel of 500

NSUZXYTT L4950TS

6 weeks

5000

General Description

The LM4950 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV's. It is capable of delivering 3.1 watts per channel to a 4 single-ended load with less than 1% THD+N or 7.5 watts mono BTL to an 8 load, with less than 10% THD+N from a 12V_DC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4950 does not require bootstrap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and minimal size.

The LM4950 features a low-power consumption active-low shutdown mode. Additionally, the LM4950 features an internal thermal shutdown protection mechanism along with short circuit protection.

The LM4950 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4950 is a unity-gain stable and can be configured by external gain-setting resistors.

Application Notes

Title	Size in Kbytes	Date
AN-1425: Application Note 1425 Differences Between National Semiconductor 10/100 Mb/s Ethernet Physical Layer Devices	459 Kbytes	15-Dec-05	View Online	Download	Receive via Email
AN-1425 (Chinese): Application Note 1425 Differences Between National Semiconductor 10/100 Mb/s Ethernet Physical Layer Devices	242 Kbytes
AN-1506: Application Note 1506 DP83843 to DP83848C/I/YB PHYTER System Rollover Document	498 Kbytes	3-Jul-06	View Online	Download	Receive via Email
AN-1506 (Chinese): Application Note 1506 DP83843 to DP83848C/I/YB PHYTER System Rollover Document	330 Kbytes

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