Features No output coupling capacitors, snubber networks or bootstrap capacitors required Unity gain stable Externally configurable gain Ultra low current active low shutdown mode BTL output can drive capacitive loads up to 100pF "Click and pop" suppression circuitry 2.7V - 9.0V operation Available in space-saving microSMD package Description The LM4954 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 2.4 Watts of continuous average power to an 8 BTL load with less than 1% THD+N from a 7VDC power supply. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal number of external components. The LM4954 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for lower-power portable applications where minimal space and power consumption are primary requirements. The LM4954 features a low-power consumption global shutdown mode which is achieved by driving the shutdown pin with logic low. Additionally, the LM4954 features an internal thermal shutdown protection mechanism. The LM4954 contains advanced pop & click circuitry which eliminates noises that would otherwise occur during turn-on and turn-off transitions. The LM4954 is unity-gain stable and can be configured by external gain-setting resistors. Key Specification Wide Power Supply Voltage Range 2.7 <= VDD <= 9V Output Power: VDD = 7V, 1% THD+N 2.4W (typ) Quiescent power supply current 3mA (typ) PSRR: VDD = 5V and 3V at 217Hz 80dB (typ) Shutdown power supply current 0.01µA (typ) Applications Mobile Phones PDAs

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance *click for larger image

Datasheets

Title		Size	Date	Other Language
	LM4954 High Voltage 3 Watt Audio Power Amplifier	975 Kbytes	22-Jun-05

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4954TL/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 1230 RS COMPONENTS Worldwide 115	$1.10 each at 1K+ pcs	reel of 250
LM4954TLX/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.10 each at 1K+ pcs	reel of 3000

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

Moisture Sensitivity Level Data for LM4954.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4954 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4954TL/NOPB	2.731	MICRO SMD	9	1	260	Detail	Download	N/A	XVG I F2
LM4954TLX/NOPB	2.731	MICRO SMD	9	1	260	Detail	Download	N/A	XVG I F2

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

Moisture Sensitivity Level Data for LM4954.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4954 is located at RoHS Status.

CAD Symbols and Models Download LM4954 CAD Symbols

Models N/A