LM4820M-6 National Semiconductor, LM4820M-6 Datasheet

LM4820M-6

Manufacturer Part Number

LM4820M-6

Description

IC AMP AUDIO PWR 1W MONO 8SOIC

Manufacturer

National Semiconductor

Series

Boomer®r

Type

Class ABr

Datasheet

1.LM4820ITP-6NOPB.pdf (20 pages)

Specifications of LM4820M-6

Output Type

1-Channel (Mono)

Max Output Power X Channels @ Load

1W x 1 @ 8 Ohm

Voltage - Supply

2 V ~ 5.5 V

Features

Depop, Shutdown, Thermal Protection

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Other names

*LM4820M-6

Available stocks

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Download datasheet (995Kb)

LM4820-6

Fixed Gain 1 Watt Audio Power Amplifier

General Description

The LM4820-6 is an audio power amplifier primarily de-

signed for demanding applications in mobile phones and

other portable communication device applications. It is ca-

pable of delivering 1 watt of continuous average power to an

8Ω BTL load with less than 1% distortion (THD+N) at 6dB of

BTL gain from a 5V

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4820-6 does not require input

and gain resistors, output coupling capacitors or bootstrap

capacitors, and therefore is ideally suited for mobile phone

and other low voltage applications where minimal parts

count and low power consumption is a primary requirement.

The LM4820-6 features a low-power consumption shutdown

mode, which is achieved by driving the shutdown pin with

logic low. Additionally, the LM4820-6 features an internal

thermal shutdown protection mechanism.

The LM4820-6 contains advanced pop & click circuitry which

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

Typical Application

Boomer

is a registered trademark of National Semiconductor Corporation.

power supply.

FIGURE 1. Typical Audio Amplifier Application Circuit

DS200106

Key Specifications

Features

n Fixed 6dB BTL voltage gain

n Available in space-saving packages micro SMD, MSOP

n Ultra low current shutdown mode

n Can drive capacitive loads up to 500 pF

n Improved pop & click circuitry eliminates noises during

n 2.0 - 5.5V operation

n No output coupling capacitors, snubber networks or

n External gain configuration still possible

Applications

n Mobile Phones

n PDAs

n Portable electronic devices

and SOIC

turn-on and turn-off transitions

bootstrap capacitors required

Improved PSRR at 217Hz

Power Output at 5.0V & 1% THD

Power Output at 3.3V & 1% THD

Shutdown Current

20010601

October 2002

400mW(typ.)

www.national.com

0.1µA(typ.)

1.0W(typ.)

62dB

Related parts for LM4820M-6

LM4820M-6 Summary of contents

Page 1

... Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Key Specifications j Improved PSRR at 217Hz j Power Output at 5.0V & 1% THD j Power Output at 3.3V & ...

Page 2

... See NS Package Number BPA08DDB Mini Small Outline (MSOP) Package Top View Order Number LM4820MM-6 See NS Package Number MUA08A SO Marking Top View XY - Date Code TT - Die Traceability Bottom 2 lines - Part Number ( LM4820M-6 ) www.national.com 20010623 20010636 20010672 2 Small Outline (SO) Package 20010635 Top View Order Number LM4820M-6 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature Thermal Resistance θ (SO) JC θ ...

Page 4

Electrical Characteristics V The following specifications apply for V 25˚C. (Continued) Symbol Parameter P Output Power ( 8Ω Output Power ( 4Ω ) THD+N Total Harmonic Distortion+Noise PSRR Power Supply Rejection Ratio A Fixed Voltage Gain V Note ...

Page 5

Typical Performance Characteristics THD+N vs Frequency 5V, 8Ω and PWR = 250mW DD L THD+N vs Frequency 2.6V, 8Ω and PWR = 100mW DD L THD+N vs Frequency at V ...

Page 6

Typical Performance Characteristics THD+N vs Power Out @ V = 5V, 8Ω THD+N vs Power Out @ V = 2.6V, 8Ω www.national.com (Continued) , 1kHz L 20010641 , 1kHz L 20010643 6 THD+N vs Power Out ...

Page 7

Typical Performance Characteristics Power Supply Rejection Ratio (PSRR) Input terminated with 10Ω R Power Supply Rejection Ratio (PSRR) Input terminated with 10Ω R (Continued Power Supply Rejection Ratio (PSRR) DD 20010645 @ V = 2.6V Power ...

Page 8

Typical Performance Characteristics Power Dissipation vs Output Power V = 3.3V DD Output Power vs Load Resistance www.national.com (Continued) Power Dissipation vs 20010649 Power Dissipation vs 20010651 8 Output Power @ 20010648 Output Power V = ...

Page 9

Typical Performance Characteristics Supply Current vs Shutdown Voltage Open Loop Frequency Response (Continued) Clipping (Dropout) Voltage vs Supply Voltage 20010653 Frequency Response vs Input Capacitor Size 20010655 9 20010652 20010654 www.national.com ...

Page 10

Typical Performance Characteristics Power Derating Curves www.national.com (Continued) Noise Floor 20010669 10 20010656 ...

Page 11

Application Information BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1, the LM4820-6 has two operational amplifiers internally. Figure 1 shows that the output of am- plifier one serves as the input to amplifier two which results in both amplifiers producing ...

Page 12

Application Information reproduce signals below 100 Hz to 150 Hz. Thus, using a large input capacitor may not increase actual system perfor- mance. In addition to system cost and size, click and pop perfor- mance is effected by the size ...

Page 13

Application Information FIGURE 2. Reference Design Board and Layout - micro SMD (Continued) 13 20010625 www.national.com ...

Page 14

Application Information LM4820-6 micro SMD BOARD ARTWORK Silk Screen Bottom Layer Inner Layer V www.national.com (Continued) 20010657 20010659 DD 20010661 14 Top Layer 20010658 Inner Layer Ground 20010660 ...

Page 15

Application Information FIGURE 3. Reference Design Board and PCB Layout Guidelines - MSOP & SO Boards (Continued) 15 20010668 www.national.com ...

Page 16

Application Information LM4820-6 SO DEMO BOARD ARTWORK Silk Screen Top Layer Bottom Layer www.national.com LM4820-6 MSOP DEMO BOARD ARTWORK (Continued) 20010662 20010663 20010664 16 Silk Screen 20010665 Top Layer 20010666 Bottom Layer 20010667 ...

Page 17

Application Information Item Part Number 1 551011208-001 LM4820-6 Mono Reference Design Board 1 10 482911183-001 LM4820-6 Audio AMP 20 151911207-001 Tant Cap 1uF 16V 10 21 151911207-002 Cer Cap 0.39uF 50V Z5U 20% 1210 25 152911207-001 Tant Cap 1uF 16V ...

Page 18

Physical Dimensions Note: Unless otherwise specified. 1. Epoxy coating. 2. 63Sn/37Pb eutectic bump. 3. Recommend non-solder mask defined landing pad. 4. Pin 1 is established by lower left corner with respect to text orientation pins are numbered counterclockwise. 5. Reference ...

Page 19

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) MSOP Order Number LM4820MM-6 NS Package Number MUA08A SO Order Number LM4820M-6 NS Package Number M08A 19 www.national.com ...

Page 20

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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