lm4962tl National Semiconductor Corporation, lm4962tl Datasheet

lm4962tl

Manufacturer Part Number

lm4962tl

Description

Ceramic Speaker Driver

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM4962TL.pdf (22 pages)

Current page: 1 of 22
Download datasheet (837Kb)

LM4962

Ceramic Speaker Driver

General Description

The LM4962 is an audio power amplifier primarily designed

for driving Ceramic Speaker for applications in Cell Phones,

Smart Phones, PDA’s and other portable applications. It is

capable of driving 15Vpp (typ) BTL with less than 1%

THD+N from a 3.2V

and low power consumption shutdown mode, an internal

thermal shutdown protection mechanism, along with over

current protection (OCP) and over voltage protection (OVP).

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal number of

external components. The LM4962 does not require boot-

strap capacitors, or snubber circuits.

The LM4962 also features a Band-Switch function which

allows the user to use one amplifier device for both receiver

(earpiece) mode and ringer/loudspeaker mode.

The LM4962 contains advanced pop & click circuitry that

eliminates noises which would otherwise occur during

turn-on and turn-off transitions. Additionally, the internal

boost converter features a soft-start function.

The LM4962 is unity-gain stable and can be configured by

external gain-setting resistors.

Boomer

is a registered trademark of National Semiconductor Corporation.

power supply. The LM4962 features

DS201422

Key Specifications

n Quiescent Power Supply Current (Boost Converter +

n Voltage Swing in BTL at 1% THD, f=1KHz

n Shutdown current

n OVP

Features

n Pop & click circuitry eliminates noise during turn-on and

n Low current shutdown mode

n Low quiescent current

n Mono 15Vp-p BTL output, R

n Over-current protection

n Over-Voltage Protection

n Unity-gain stable

n External gain configuration capability

n Including Band switch function

n Leakage cut switch (SW-LEAK)

n Soft-Start function

n Space-saving micro SMD package (2mm x 2.5mm)

Applications

n Smart phones

n Mobile Phones and Multimedia Terminals

n PDA’s, Internet Appliances, and Portable Gaming

n Portable DVD

n Digital still cameras/camcorders

Amplifier)

turn-off transitions

THD+N

= 2µF+9.4Ω, f = 1kHz, 1%

8.5V

January 2006

www.national.com

15Vp-p (typ)

AMP

0.1µA (typ)

9mA (typ)

9.5V

Related parts for lm4962tl

lm4962tl Summary of contents

Page 1

... Additionally, the internal boost converter features a soft-start function. The LM4962 is unity-gain stable and can be configured by external gain-setting resistors. Boomer is a registered trademark of National Semiconductor Corporation. ® © 2006 National Semiconductor Corporation Key Specifications n Quiescent Power Supply Current (Boost Converter + ...

Page 2

... Connection Diagrams www.national.com micro SMD Package Top View Order Number LM4962TL See NS Package Number TLA2011A micro SMD Top Marking 20142233 Top View XY = Date Code TT = Die Run Traceability G = Boomer Family F7 = LM4962TL 2 20142207 ...

Page 3

Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit 3 20142206 www.national.com ...

Page 4

Block Diagram www.national.com FIGURE 2. LM4962 Block Diagram 4 20142205 ...

Page 5

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Amplifier Supply Voltage (V ) AMP Storage Temperature Input Voltage Power Dissipation (Note 3) ...

Page 6

Electrical Characteristics Note 1: All voltages are measured with respect to the GND pin, unless otherwise specified. Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device ...

Page 7

Typical Performance Characteristics THD+N vs Frequency V = 3.2V 4.95V , RMS THD+N vs Frequency 4.95V , RMS L THD+N vs Output Voltage Swing V = 4.2V, ...

Page 8

Typical Performance Characteristics PSRR vs Frequency 2µF+9.4Ω PSRR vs Frequency 2µF+9.4Ω RIPPLE Boost Efficiency vs Output Voltage Swing f = 1kHz 2µF+9.4Ω ...

Page 9

Typical Performance Characteristics Supply Current vs Supply Voltage OCP amp (Continued) Feedback Voltage vs Temperature 20142222 20142224 9 20142223 ds(on) BOOTSTRAP 20142238 www.national.com ...

Page 10

Application Information BRIDGE CONFIGURATION EXPLANATION The Audio Amplifier portion of the LM4962 has two internal amplifiers allowing different amplifier configurations. The first amplifier’s gain is externally configurable, whereas the sec- ond amplifier is internally fixed in a unity-gain, inverting configuration. ...

Page 11

Application Information FIGURE 3. Power on Sequence Timing Diagram (Continued) 11 20142219 www.national.com ...

Page 12

Application Information OVER-CURRENT AND OVER-VOLTAGE PROTECTION FUNCTION Flagout Pin: The Flagout pin indicates a fault when an over current or over voltage condition has been detected. The Flagout pin is high impedance when inactive. When active, the Flagout pin is ...

Page 13

Application Information (Continued) FIGURE 5. OVP Timing Diagram 13 20142218 www.national.com ...

Page 14

Application Information PROPER SELECTION OF EXTERNAL COMPONENTS Proper selection of external components in applications us- ing integrated power amplifiers, and switching DC-DC con- verters, is critical for optimizing device and system perfor- mance. Consideration to component values must be used ...

Page 15

Application Information will decrease wake-up time and increase the transient cur- rent seen at startup. A standard rule of thumb is to use a capacitor 1000 times smaller than the output capacitance of the boost converter (C2+Cs2). A 10nF soft-start ...

Page 16

Application Information Some additional guidelines to be observed: 1. Keep the path between L1, D2, and C2 extremely short. Parasitic trace inductance in series with D2 and C2 will increase noise and ringing internal ground planes are available ...

Page 17

Application Information (Continued) FIGURE 6. Demo Board Schematic 17 20142225 www.national.com ...

Page 18

Application Information www.national.com (Continued) 20142226 FIGURE 7. Silkscreen FIGURE 8. Top Layer 18 20142236 ...

Page 19

Application Information (Continued) FIGURE 9. Mid– Layer 1 19 20142237 www.national.com ...

Page 20

Application Information www.national.com (Continued) 20142229 FIGURE 10. Mid– Layer 2 20142230 FIGURE 11. Bottom Layer 20 ...

Page 21

Revision History Rev 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 Date 7/15/05 Edited 20142201. 9/27/05 Edited the table underneath Figure 1 and added the pin out pkg. 10/24/05 Added the 2 timing dgs. 10/28/05 Added ...

Page 22

... Email: new.feedback@nsc.com Tel: 1-800-272-9959 Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 Thin micro SMD Order Number LM4962TL NS Package Number TLA2011A ± ± 0.03mm X2 = 2.466 0.03mm X3 = 0.600 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

Related keywords

lm4962tl datasheet
lm4962tl data sheet
lm4962tl pdf datasheet
lm4962tl component
lm4962tl part
lm4962tl distributor
lm4962tl RoHS
lm4962tl datasheet download