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

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

Parameters Values Voltage@ Vcc=3V, 1% THD 15 Volt Voltage@ Vcc=5V, 1%THD 15 Volt Voltage@ Vcc=3V, 10% THD 17 Volt Voltage@ Vcc=5V, 10% THD 17 Volt Load Conditions 2uF+30ohm Supply Min 3.0 Volt Supply Max 5.0 Volt THD 0.1 % THD Conditions Vout=14Vpp at Vcc=3.2V Shutdown Type Low

Datasheets

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

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4961LQ/NOPB LM4961LQ RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 3000 MOUSER Worldwide 1000 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 DIGI-KEY 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/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4961.

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 LM4961 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4961LQBD	Ceramic Speaker Driver	Full production	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$300.00 each	1
The LM4961 is an audio power amplifier primarily designed for driving Ceramic Speaker for applications in Cell Phone and PDA's. 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. This LM4961LQBD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the LM4961LQ. It is an easy to use stand-alone board that requires power and GND, an input signal and an output load. 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 Applications: Cellphone PDA Contents: Fully Assembled LM4961LQ Evaluation Board Instructions for where to locate and download the datasheet    Please note: application information and board layout can be found in datasheet

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4961LQ/NOPB LM4961LQ	59.865 60.094	LLP	28	1 1	260 260	Detail	Download	N/A	NS UZXYTT L4961LQ
LM4961LQX/NOPB LM4961LQX	59.866 60.094	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/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4961.

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 LM4961 is located at RoHS Status.

CAD Symbols and Models Download LM4961 CAD Symbols

Models N/A