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LM4890IBL 데이터시트 PDF




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부품번호 LM4890IBL 기능
기능 1 Watt Audio Power Amplifier
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LM4890IBL 데이터시트, 핀배열, 회로
May 2003
LM4890
1 Watt Audio Power Amplifier
General Description
The LM4890 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other por-
table communication device applications. It is capable of
delivering 1 watt of continuous average power to an 8BTL
load 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 LM4890 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 LM4890 features a low-power consumption shutdown
mode, which is achieved by driving the shutdown pin with
logic low. Additionally, the LM4890 features an internal ther-
mal shutdown protection mechanism.
The LM4890 contains advanced pop & click circuitry which
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4890 is unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j PSRR at 217Hz, VDD = 5V (Fig. 1)
j Power Output at 5.0V & 1% THD
j Power Output at 3.3V & 1% THD
j Shutdown Current
62dB(typ.)
1W(typ.)
400mW(typ.)
0.1µA(typ.)
Features
n Available in space-saving packages: micro SMD, MSOP,
SOIC, and LLP
n Ultra low current shutdown mode
n BTL output can drive capacitive loads
n Improved pop & click circuitry eliminates noises during
turn-on and turn-off transitions
n 2.2 - 5.5V operation
n No output coupling capacitors, snubber networks or
bootstrap capacitors required
n Thermal shutdown protection
n Unity-gain stable
n External gain configuration capability
Applications
n Mobile Phones
n PDAs
n Portable electronic devices
Connection Diagrams
8 Bump micro SMD
8 bump micro SMD Marking
20019223
Top View
Order Number LM4890IBP, LM4890IBPX
See NS Package Number BPA08DDB
20019270
Top View
X - Date Code
T - Die Traceability
G - Boomer Family
E - LM4890IBP
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation DS200192
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LM4890IBL 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 (Note 11)
Storage Temperature
Input Voltage
Power Dissipation (Note 3)
ESD Susceptibility (Note 4)
Junction Temperature
Thermal Resistance
θJC (SOP)
θJA (SOP)
θJA (8 Bump micro SMD, Note 12)
6.0V
−65˚C to +150˚C
−0.3V to VDD +0.3V
Internally Limited
2000V
150˚C
35˚C/W
150˚C/W
220˚C/W
θJA (9 Bump micro SMD, Note 12)
θJC (MSOP)
θJA (MSOP)
θJA (LLP)
Soldering Information
180˚C/W
56˚C/W
190˚C/W
220˚C/W
See AN-1112 "microSMD Wafers Level Chip Scale
Package."
See AN-1187 "Leadless Leadframe Package (LLP)."
Operating Ratings
Temperature Range
TMIN TA TMAX
Supply Voltage
−40˚C TA 85˚C
2.2V VDD 5.5V
Electrical Characteristics VDD = 5V (Notes 1, 2, 8)
The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
IDD Quiescent Power Supply Current
ISD
VSDIH
VSDIL
VOS
ROUT-GND
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Ofsett Voltage
Resistor Output to GND (Note 10)
VIN = 0V, Io = 0A, No Load
VIN = 0V, Io = 0A, 8Load
VSHUTDOWN = 0V
Po
TWU
TSD
Output Power ( 8)
Wake-up time
Thermal Shutdown Temperature
THD = 2% (max); f = 1 kHz
THD+N
PSRR
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
(Note 14)
TSDT
Shut Down Time
Po = 0.4 Wrms; f = 1kHz
Vripple = 200mV sine p-p
Input Terminated with 10 ohms to
ground
8 load
LM4890
Typical
Limit
(Note 6) (Notes 7, 9)
48
5 10
0.1 2.0
1.2
0.4
7 50
9.7
8.5
7.0
1.0 0.8
170 220
150
170
190
0.1
62 (f =
55
217Hz)
66 (f = 1kHz)
1.0
Units
(Limits)
mA (max)
mA (max)
µA (max)
V (min)
V (max)
mV (max)
k(max)
k(min)
W
ms (max)
˚C (min)
˚C (max)
%
dB (min)
ms (max)
Electrical Characteristics VDD = 3V (Notes 1, 2, 8)
The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
IDD Quiescent Power Supply Current
ISD
VSDIH
VSDIL
VOS
ROUT-GND
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
Resistor Output to Gnd (Note 10)
VIN = 0V, Io = 0A, No Load
VIN = 0V, Io = 0A, 8Load
VSHUTDOWN = 0V
TWU
Wake-up time
LM4890
Typical
Limit
(Note 6) (Notes 7, 9)
3.5 7
4.5 9
0.1 2.0
1.2
0.4
7 50
9.7
8.5
7.0
120 180
Units
(Limits)
mA (max)
mA (max)
µA (max)
V(min)
V(max)
mV (max)
k(max)
k(min)
ms (max)
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LM4890IBL 전자부품, 판매, 대치품
Typical Performance Characteristics
THD+N vs Frequency
at VDD = 5V, 8RL, and PWR = 250mW, AV = 2
THD+N vs Frequency
at VDD = 3.3V, 8RL, and PWR = 150mW, AV = 2
20019237
THD+N vs Frequency
at VDD = 3V, RL = 8, PWR = 250mW, AV = 2
20019238
THD+N vs Frequency
@ VDD = 2.6V, RL = 8, PWR = 100mW, AV = 2
20019290
THD+N vs Frequency
@ VDD = 2.6V, RL = 4, PWR = 100mW, AV = 2
20019239
7
20019240
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