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参数资料
| 型号： | LM4668MH/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 10 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 文件页数： | 8/14页 |
| 文件大小： | 472K |
| 代理商： | LM4668MH/NOPB |
Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
16V
Storage Temperature
65C to +150C
Input Voltage
0.3V to V
DD +0.3V
Power Dissipation (Note 3)
Internally limited
ESD Susceptibility (Note 4)
2000V
ESD Susceptibility (Note 5)
200V
Junction Temperature (LD and MH)
150C
Thermal Resistance
θ
JC
2C/W
θ
JA
40C/W
Operating Ratings
Temperature Range
T
MIN
≤ T
A
≤ T
MAX
40C
≤ T
A
≤ 85C
Supply Voltage (Note 10)
9V
≤ V
DD
≤ 14.0V
Electrical Characteristics for the LM4668 (Note 1)
The following specifications apply for the circuit shown in Figure 1 operating with V
DD = 12V, RL =8
, and f
IN = 1kHz,
unless otherwise specified. Limits apply for T
A = 25C.
Symbol
Parameter
Conditions
LM4668
Units
(Limits)
Typical
Limit
(Notes 7,
I
DD
Quiescent Power Supply Current
V
IN = 0V, IO = 0A, RL =8
30
65
mA (max)
I
SD
Shutdown Current
V
SHUTDOWN = GND (Note 9)
0.15
mA
A
V
Amplifier Gain
BTL output voltage with respect to input
voltage, V
IN = 100mVp-p
30
32
28
dB (max)
dB (min)
P
O
Output Power
THD+N = 1% (max)
THD+N = 10%, V
DD = 14V
6
10
5
W (min)
W
THD+N
Total Harmonic Distortion + Noise
P
OUT =1WRMS
0.2
%
f
BW
Frequency Response Bandwith
P
OUT = 6W, post filter,
-3dB relative to the output amplitude
at 1kHz, See Figure 1
20
20000
Hz
η
Efficiency
P
OUT = 6W, including output filter
79
%
éN
Output Noise
A-Weighted Filter, V
IN = 0V
220
V
SNR
Signal-to-Noise Ratio
A-Weighted Filter, P
OUT =6W
A
V = 30dB
90
dB
PSRR
Power Supply Rejection Ratio
V
RIPPLE = 20mVp-p,CBYPASS_1 = 10F,
input referred
f = 50Hz
f = 60Hz
f = 100Hz
f = 120Hz
f = 1kHz
79
82
85
84
75
dB
t
WU
Wake-Up time
C
BYPASS = 10F
600
ms
T
SD
Thermal Shutdown Temperature
170
C (min)
C (max)
V
SDIH
Shutdown Voltage Input High
4
V (min)
V
SDIL
Shutdown Voltage Input Low
1.5
V (max)
Note 1: All voltages are measured with respect to the GND pin unless otherwise specified.
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 3: The maximum power dissipation must be de-rated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum
allowable power dissipation is PDMAX =(TJMAX TA)/θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4668 typical application
(shown in Figure 1) with VDD = 12V, RL =8 stereo operation, the total power dissipation is 900mW. θJA = 40C/W
Note 4: Human body model, 100pF discharged through a 1.5k
resistor.
Note 5: Machine model, 220pF – 240pF discharged through all pins.
Note 6: Typicals are measured at 25C and represent the parametric norm.
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
LM4668
www.national.com
3
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