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 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 12VDC 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. 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) Applications • Flat Panel Monitors • Flat panel TV's • Computer Sound Cards

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Datasheets

Title		Size	Date	Other Language
	LM4950 Boomer ® Audio Power Amplifier Series 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier	1447 Kbytes	18-Aug-04

More Application Notes

Title		Size	Date	Other Language
	AN-1441: Application Note 1441 LM4962 Evaluation Board	840 Kbytes	20-Apr-06
	AN-1440: Application Note 1440 LM4962 Stereo Ceramic Speaker Driver Application Note	760 Kbytes	20-Apr-06	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM4950TA/NOPB LM4950TA RoHS Status		Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 508 AVNET-EM Worldwide 1 DIGIKEY Worldwide 94 FARNELL Europe and Asia 1096 FUTURE Worldwide 123 RS COMPONENTS Worldwide 20	$1.19 each at 1K+ pcs	rail of 45
LM4950TS/NOPB LM4950TS RoHS Status	TO-263	Full production Lead Time: 16 weeks	Distributor Region Qty ARROW Worldwide 892 AVNET-EM Worldwide 543 DIGIKEY Worldwide 11 FUTURE Worldwide 910 KEIKONG Asia Pacific 80 NEWARK Americas 292 RS COMPONENTS Worldwide 10	$1.19 each at 1K+ pcs	rail of 45
LM4950TSX/NOPB LM4950TSX RoHS Status	TO-263	Full production Lead Time: 16 weeks	Distributor Region Qty DIGIKEY Worldwide 0 FUTURE Worldwide 490 TECHMOSA Asia Pacific 6500	$1.19 each at 1K+ pcs	reel of 500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4950TA/NOPB LM4950TA		TO-220	9	1 1	NA NA	Detail	Download	N/A	NSUZXYTTE# L4950TA
LM4950TS/NOPB LM4950TS		TO-263	9	3 3	245 235	Detail	Download	N/A	NSUZXYTTE# L4950TS
LM4950TSX/NOPB LM4950TSX		TO-263	9	3 3	245 235	Detail	Download	N/A	NSUZXYTTE# L4950TS

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

CAD Symbols and Models Download LM4950 CAD Symbols

Models N/A