LM4863MT National Semiconductor, LM4863MT Datasheet

no-image

LM4863MT

Manufacturer Part Number
LM4863MT
Description
Dual 2.2W Audio Amplifier Plus Stereo Headphone Function
Manufacturer
National Semiconductor
Datasheets

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4863MT
Manufacturer:
NSC
Quantity:
10
Part Number:
LM4863MT
Manufacturer:
NS
Quantity:
866
Part Number:
LM4863MT
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM4863MT
Quantity:
2 000
Part Number:
LM4863MTC
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LM4863MTE
Manufacturer:
NSC
Quantity:
7
Part Number:
LM4863MTE
Manufacturer:
NS
Quantity:
1 370
Part Number:
LM4863MTE
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LM4863MTE/NOPB
Manufacturer:
MINGTEK
Quantity:
12 000
Part Number:
LM4863MTEX
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LM4863MTEX/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
LM4863MTX
Manufacturer:
NS
Quantity:
17 458
© 1999 National Semiconductor Corporation
LM4863
Dual 2.2W Audio Amplifier Plus Stereo Headphone
Function
General Description
The LM4863 is a dual bridge-connected audio power ampli-
fier which, when connected to a 5V supply, will deliver 2.2W
to a 4 load (Note 1) or 2.5W to a 3 load (Note 2)with less
than 1.0% THD+N. In addition, the headphone input pin al-
lows the amplifiers to operate in single-ended mode to drive
stereo headphones.
Boomer audio power amplifiers were designed specifically to
provide high quality output power from a surface mount
package while requiring few external components. To sim-
plify audio system design, the LM4863 combines dual bridge
speaker amplifiers and stereo headphone amplifiers on one
chip.
The LM4863 features an externally controlled, low-power
consumption shutdown mode, a stereo headphone amplifier
mode, and thermal shutdown protection. It also utilizes cir-
cuitry to reduce “clicks and pops” during device turn-on.
Note 1: An LM4863MTE which has been properly mounted to the circuit
board will deliver 2.2W into 4 . The other package options for the LM4863
will deliver 1.1W into 8 . See the Application Information section for
LM4863MTE usage information.
Note 2: An LM4863MTE which has been properly mounted to the circuit
board and forced-air cooled will deliver 2.5W into 3 .
Typical Application
*
Boomer
Refer to the section Proper Selection of External Components, for a detailed discussion of C
®
is a registered trademark of National Semiconductor Corporation.
FIGURE 1. Typical Audio Amplifier Application Circuit
DS012881
Key Specifications
Features
n Stereo headphone amplifier mode
n “Click and pop” suppression circuitry
n Unity-gain stable
n Thermal shutdown protection circuitry
n Exposed-DAP TSSOP, TSSOP, SOIC and DIP
Applications
n Multimedia monitors
n Portable and desktop computers
n Portable televisions
n P
n Single-ended mode - THD+N
n Shutdown current
packaging available
at 75mW into 32
into 3
into 4
into 8
O
at 1% THD+N
B
(LM4863MTE)
(LM4863MTE)
(LM4863)
size.
DS012881-1
October 1999
www.national.com
0.5%(max)
0.7µA(typ)
2.5W(typ)
2.2W(typ)
1.1W(typ)

Related parts for LM4863MT

LM4863MT Summary of contents

Page 1

... It also utilizes cir- cuitry to reduce “clicks and pops” during device turn-on. Note 1: An LM4863MTE which has been properly mounted to the circuit board will deliver 2.2W into 4 . The other package options for the LM4863 will deliver 1.1W into 8 . See the Application Information section for LM4863MTE usage information ...

Page 2

... Order Number LM4863M, LM4863N See NS Package Number M16B for SO See NS Package Number N16A for DIP See NS Package Number MXA20A for Exposed-DAP TSSOP www.national.com Top View Order Number LM4863MT See NS Package Number MTC20 for TSSOP DS012881-2 Top View Order Number LM4863MTE 2 DS012881-29 ...

Page 3

... LM4863 THD kHz = 3 LM4863MTE, R (Note LM4863MTE, R (Note LM4863 THD kHz kHz LM4863MTE LM4863 5V 200 RIPPLE RMS L = 1.0 µ 20˚C/W 80˚C/W 20˚C/W 63˚ ...

Page 4

... MXA20A package whose exposed-DAP is not soldered to any copper. JA Note 7: When driving 3 loads from a 5V supply, the LM4863MTE must be mounted to the circuit board and forced-air cooled (450 linear-feet per minute). Note 8: When driving 4 loads from a 5V supply, the LM4863MTE must be mounted to the circuit board. ...

Page 5

... THD+N vs Frequency DS012881-98 Note 16: These curves show the thermal dissipation ability of the LM4863MTE at different ambient temperatures given these conditions: 500LFPM + JEDEC board: The part is soldered to a 1S2P 20-lead exposed-DAP TSSOP test board with 500 linear feet per minute of forced-air flow across it ...

Page 6

Non-MTE Specific Characteristics THD+N vs Frequency DS012881-3 THD+N vs Output Power DS012881-6 THD+N vs Output Power DS012881-87 THD+N vs Frequency DS012881-88 www.national.com THD+N vs Frequency DS012881-4 THD+N vs Output Power DS012881-7 THD+N vs Frequency DS012881-89 Output Power vs Load Resistance ...

Page 7

Non-MTE Specific Characteristics Output Power vs Supply Voltage DS012881-9 Output Power vs Load Resistance DS012881-12 Dropout Voltage vs Supply Voltage DS012881-15 Noise Floor DS012881-18 (Continued) Output Power vs Supply Voltage DS012881-10 Output Power vs Load Resistance DS012881-13 Power Derating Curve ...

Page 8

... With low impedance loads, the output power at the loads is heavily dependent on trace resistance from the output pins of the LM4863. Traces from the output of the LM4863MTE to the load or load connectors should be as wide as practical. Any resistance in the output traces will reduce the power de- livered to the load ...

Page 9

Application Information (Continued) POWER DISSIPATION Whether the power amplifier is bridged or single-ended, power dissipation is a major concern when designing the amplifier. Equation 1 states the maximum power dissipation point for a single-ended amplifier operating at a given supply ...

Page 10

Application Information PROPER SELECTION OF EXTERNAL COMPONENTS Proper selection of external components in applications us- ing integrated power amplifiers is critical to optimize device and system performance. While the LM4863 is tolerant to a The LM4863 is unity-gain stable, giving ...

Page 11

... LM4863 can still be used without running into bandwidth problems. DEMOBOARD CIRCUIT LAYOUT The demoboard circuit layout is provided here as an ex- ample of a circuit using the LM4863 LM4863MTE is 1 Wrms used with this layout, the exposed-DAP is soldered down to 8 the copper pad beneath the part. Heat is conducted away ...

Page 12

Application Information Component-side Copper Layers www.national.com (Continued) Solder-side Copper Layers DS012881-91 12 DS012881-92 ...

Page 13

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead (0.300" Wide) Molded Small Outline Package, JEDEC 16-Lead (0.300" Wide) Molded Dual-In-Line Package Order Number LM4863M NS Package Number M16B Order Number LM4863N NS Package Number N16A 13 www.national.com ...

Page 14

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Molded PKG, TSSOP, JEDEC, 4.4mm BODY WIDTH www.national.com Order Number LM4863MT NS Package Number MTC20 14 ...

Page 15

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Molded TSSOP, Exposed Pad, 6.5x4.4x0.9mm Order Number LM4863MTE NS Package Number MXA20A 15 www.national.com ...

Page 16

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

Related keywords