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부품번호 | LM4913 기능 |
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기능 | 2W Monaural/ 90mW Stereo Headphone Audio Amplifier | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 15 페이지수
December 2002
LM4913
2W Monaural, 90mW Stereo Headphone Audio Amplifier
General Description
The unity-gain stable LM4913 is both a mono differential
output (for bridge-tied loads, or BTL) audio power amplifier
and a single-ended (SE) stereo headphone amplifier. Oper-
ating on a single 5V supply, the mono BTL mode delivers 2W
(typ) to a 4Ω load (Note 1) at 0.3% THD+N. In SE stereo
mode, the amplifier will deliver 90mW to 32Ω loads. The
LM4913 features circuitry that suppresses output transients
("clicks and pops").
The LM4913 is designed for notebook and other handheld
portable applications. It delivers high quality output power
from a surface-mount package and requires few external
components. The LM4913 is pin and functionally compatible
with the TPA0213.
Other features include an active-low micro-power shutdown
mode and thermal shutdown protection.
The LM4913 is available a space efficient 10-lead exposed-
DAP TSSOP package.
Note 1: When operating on a 5VDC supply, an LM4913MH that has been
properly mounted to a circuit board will deliver 2W into 4Ω. See the Applica-
tion Information sections for further information concerning PCB layout sug-
gestions to maximize the LM4913MH’s output power with a 4Ω load.
Key Specifications
j BTL output power (RL = 4Ω)
VDD = at 3.0V, THD = 1%
660mW (typ)
VDD = at 5.0V, THD = 0.3%
2W (typ)
j SE output power (RL = 32Ω and THD = 0.1%)
VDD = at 3.0V
33mW (typ)
VDD = at 5.0V
90mW (typ)
j Micro-power shutdown supply current
1µA (typ)
jPSRR (@ 1kHz, 2.9V ≤ VDD ≤
5.1V, (Fig. 1))
BTL
SE
52dB (typ)
62dB (typ)
Features
n Advanced "click and pop" suppression circuitry
n Stereo headphone amplifier mode
n Low current micro-power shutdown mode
n Thermal shutdown protection circuitry
n 2.5V to 5.5V operation
n Unity-gain stable
n Gain set with external resistors
n Space-saving exposed-DAP TSSOP package
Applications
n PDAs
n Cellular phones
n Handheld portable electronic devices
Connection Diagram
Top View
Order Number LM4913MH
See NS package Number MXF10A
200617A0
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2002 National Semiconductor Corporation DS200617
www.national.com
Electrical Characteristics: Bridged-Mode Operation (VDD = 5V) (Notes 4, 9)
The following specifications apply for the circuit shown in Figure 1, RL = 4Ω, and a measurement bandwidth of 20Hz to
80kHz, unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
PO
THD+N
VON
Output Power (Note 11)
Total Harmonic Distortion + Noise
Output Voltage Noise
THD = 0.3% (max); f = 1kHz
RL = 4Ω (Note 12)
RL = 4Ω, PO = 1.5W, f = 1kHz
CB = 0.47µF, 20Hz < f < 20kHz
LM4913
Typical
Limit
(Note 9)
(Notes 10,
11)
2
0.2
21
Units
(Limits)
W
%
µVRMS
Electrical Characteristics: SE Operation (VDD = 5V) (Notes 4, 9)
The following specifications apply for the circuit shown in Figure 1, RL = 4Ω, and a measurement bandwidth of 20Hz to
80kHz, unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
PO
THD+N
VON
Output Power (Note 11)
Total Harmonic Distortion + Noise
Output Voltage Noise
THD+N = 0.1%, f = 1kHz, RL =
32Ω
f = 1kHz
RL =32Ω, PO = 70mW
CB = 0.47µF, 20Hz < f < 20kHz
LM4913
Typical
Limit
(Note 9)
(Notes 10,
11)
90
0.2
12
Units
(Limits)
mW
%
%
µVRMS
Electrical Characteristics for Entire Amplifier (VDD = 3V) (Notes 4, 9)
The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
VDD Supply Voltage
IDD
ISD
VOS
PSRR
HP-SVIH
HP-SVIL
SDVIH
SDVIL
Quiescent Power Supply Current VIN = 0V, IO = 0A, No Load
Shutdown Quiescent Power Supply VSHUTDOWN = GND
Current
Output Offset Voltage
Power Supply Rejection Ratio
HP-SENSE Logic-High Threshold
VDD = 3V, CBYPASS = 0.47µF,
Vripple = 200mVp-p 1kHz sine wave
BTL, RL = 8Ω
BTL, SE, RL = 32Ω
Voltage
HP-SENSE Logic-Low Threshold
Voltage
Shutdown Logic High Threshold
Shutdown Logic LowThreshold
LM4913
Typical
Limit
(Note 9)
(Notes 10,
11)
2.7
5.5
37
14
7 30
58
60
2.7
1.65
2
0.8
Units
(Limits)
V (min)
V (max)
mA (max)
µA (max)
mV (max)
dB
dB
V (min)
V (max)
V (min)
V (max)
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4
4페이지 Typical Performance Characteristics (Continued)
Total Harmonic Distortion + Noise
vs Frequency
Total Harmonic Distortion + Noise
vs Output Power
200617A6
Total Harmonic Distortion + Noise
vs Output Power
200617A7
Total Harmonic Distortion + Noise
vs Output Power
200617A8
Total Harmonic Distortion + Noise
vs Frequency
200617A9
Total Harmonic Distortion + Noise
vs Output Power
200617B0
7
200617B1
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7페이지 | |||
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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