Features • Pop & click circuitry eliminates noise during turn-on and turn-off transitions • Low current shutdown mode • Low quiescent current • Mono 15Vp-p BTL output, RL = 2μF+30Ω, f = 1kHz • Thermal shutdown protection • Unity-gain stable • External gain configuration capability • Including Band exchange SW • Including Leakage cut SW Description The LM4961 is an audio power amplifier primarily designed for driving Ceramic Speaker for applications in Cell Phone and PDAs. It integrates a boost converter, with variable output voltage, with an audio power amplifier. It is capable of driving 15Vp-p in BTL mode to 2uF+ 30 ohms load, continuous average power, with less than 1% distortion (THD+N) from a 3.2VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal number of external components. The LM4961 does not require bootstrap capacitors, or snubber circuits therefore it is ideally suited for portable applications requiring high voltage output to drive capacitive loads like Ceramic Speakers. The LM4961 features a low-power consumption shutdown mode. Additionally, the LM4961 features an internal thermal shutdown protection mechanism. The LM4961 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4961 is unity-gain stable and can be configured by external gain-setting resistors. Key Specification Quiescent Power Supply Current 7mA (typ) Voltage Swing in BTL at 1% THD 15Vp-p (typ) Shutdown current 0.1μA (typ) Applications • Cellphone • PDA

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Datasheets

Title		Size	Date	Other Language
	LM4961 Ceramic Speaker Driver	5170 Kbytes	9-Mar-07

More Application Notes

Title		Size	Date	Other Language
	AN-1440: Application Note 1440 LM4962 Stereo Ceramic Speaker Driver Application Note	760 Kbytes	20-Apr-06	中文
	AN-1441: Application Note 1441 LM4962 Evaluation Board	840 Kbytes	20-Apr-06
	AN-1611: Application Note 1611 LM48555 Evaluation Board	734 Kbytes	4-Apr-07

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM4961LQ/NOPB LM4961LQ RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 3000 DIGIKEY Worldwide 3944 FARNELL Europe and Asia 41 FUTURE Worldwide 1100 RS COMPONENTS Worldwide 4	$2.10 each at 1K+ pcs	reel of 1000
LM4961LQX/NOPB LM4961LQX RoHS Status	LLP	Full production Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$2.10 each at 1K+ pcs	reel of 4500

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
LM4961LQ/NOPB LM4961LQ		LLP	28	1 1	260 260	Detail	Download	N/A	NS UZXYTT L4961LQ
LM4961LQX/NOPB LM4961LQX		LLP	28	1 1	260 260	Detail	Download	N/A	NS UZXYTT L4961LQ

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 LM4961 CAD Symbols

Models N/A