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LM4899 데이터시트 PDF




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부품번호 LM4899 기능
기능 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain
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LM4899 데이터시트, 핀배열, 회로
July 2003
LM4899
1 Watt Fully Differential Audio Power Amplifier With
Shutdown Select and Fixed 6dB Gain
General Description
The LM4899 is a fully differential audio power amplifier
primarily designed for demanding applications in mobile
phones and other portable communication device applica-
tions. It is capable of delivering 1 watt of continuous average
power to an 8load with less than 1% distortion (THD+N)
from a 5VDC power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4899 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
The LM4899 features a low-power consumption shutdown
mode. To facilitate this, Shutdown may be enabled by either
logic high or low depending on mode selection. Driving the
shutdown mode pin either high or low enables the shutdown
select pin to be driven in a likewise manner to enable Shut-
down. Additionally, the LM4899 features an internal thermal
shutdown protection mechanism.
The LM4899 contains advanced pop & click circuitry which
virtually eliminates noises which would otherwise occur dur-
ing turn-on and turn-off transitions.
The LM4899 has an internally fixed gain of 6dB.
Key Specifications
j Improved PSRR at 217Hz
j Power Output at 5.0V & 1% THD
j Power Output at 3.3V & 1% THD
j Shutdown Current
83dB
1.0W(typ.)
400mW(typ.)
0.1µA(typ.)
Features
n Fully differential amplification
n Internal-gain-setting resistors
n Available in space-saving packages micro SMD, MSOP
and LLP
n Ultra low current shutdown mode
n Can drive capacitive loads up to 500pF
n Improved pop & click circuitry which virtually eliminates
noises during turn-on and turn-off transitions
n 2.4 - 5.5V operation
n No output coupling capacitors, snubber networks or
bootstrap capacitors required
n Shutdown high or low selectivity
Applications
n Mobile phones
n PDAs
n Portable electronic devices
Connection Diagrams
9 Bump micro SMD Package
9 Bump micro SMD Marking
200645A0
Top View
Order Number LM4899ITL, LM4899ITLX
See NS Package Number TLA09AAA
200645C7
X - Date Code
T - Die Run Traceability
G - Boomer Family
C1 - LM4899ITL
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation DS200645
www.national.com




LM4899 pdf, 반도체, 판매, 대치품
Absolute Maximum Ratings (Note 2)
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
θJC (LD)
θJA (LD)
6.0V
−65˚C to +150˚C
−0.3V to VDD +0.3V
Internally Limited
2000V
200V
150˚C
12˚C/W
63˚C/W
θJA (micro SMD)
θJC (MSOP)
θJA (MSOP)
Soldering Information
220˚C/W
56˚C/W
190˚C/W
See AN-1112 "microSMD Wafers Level Chip Scale
Package".
Operating Ratings
Temperature Range
TMIN TA TMAX
Supply Voltage
−40˚C TA +85˚C
2.4V VDD 5.5V
Electrical Characteristics VDD = 5V (Notes 1, 2, 8)
The following specifications apply for VDD = 5V and 8load unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
IDD
ISD
Po
THD+N
PSRR
CMRR
VOS
VSDIH
VSDIL
VSDIH
VSDIL
Quiescent Power Supply Current
Standby Current
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Common-Mode Rejection Ratio
Output Offset
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
VIN = 0V, no Load
VIN = 0V, RL = 8
VSDMODE = VSHUTDOWN = GND
THD = 1% (max); f = 1 kHz
LM4899LD, RL = 4(Note 11)
LM4899, RL = 8
Po = 0.4 Wrms; f = 1kHz
Vripple = 200mV sine p-p
f = 217Hz (Note 9)
f = 1kHz (Note 9)
f = 217Hz (Note 10)
f = 1kHz (Note 10)
f = 217Hz, VCM = 200mVpp
VIN = 0V
SD Mode = GND
SD Mode = GND
SD Mode = VDD
SD Mode = VDD
LM4899
Typical
Limit
(Note 6)
(Note 7)
36
5 10
0.1 1
1.4
1
0.05
0.9
83
90
83 71
83 71
50
2
0.9
0.7
0.9
0.7
Units
(Limits)
mA (max)
µA (max)
W (min)
%
dB (min)
dB
mV
V
V
V
V
Electrical Characteristics VDD = 3V (Notes 1, 2, 8)
The following specifications apply for VDD = 3V and 8load unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
IDD
ISD
Po
THD+N
Quiescent Power Supply Current
Standby Current
Output Power
Total Harmonic Distortion+Noise
VIN = 0V, no Load
VIN = 0V, RL = 8
VSDMODE = VSHUTDOWN = GND
THD = 1% (max); f = 1kHz
LM4899, RL = 8
Po = 0.25Wrms; f = 1kHz
LM4899
Typical
Limit
(Note 6)
(Note 7)
2.5 5.5
49
0.1 1
0.35
0.3
Units
(Limits)
mA (max)
µA (max)
W
%
www.national.com
4

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LM4899 전자부품, 판매, 대치품
Typical Performance Characteristics
Non-LD Specific Characteristics
THD+N vs Frequency
VDD = 5V, RL = 8, PO = 400mW
THD+N vs Frequency
VDD = 3V, RL = 8, PO = 275mW
200645B6
THD+N vs Frequency
VDD = 3V, RL = 4, PO = 225mW
200645B4
THD+N vs Frequency
VDD = 2.6V, RL = 8, PO = 150mW
200645B3
THD+N vs Frequency
VDD = 2.6V, RL = 4, PO = 150mW
200645B2
THD+N vs Output Power
VDD = 5V, RL = 8
200645B1
7
200645C2
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