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參數(shù)資料
| 型號： | LM4668 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 10W High-Efficiency Mono BTL Audio Power Amplifier |
| 中文描述： | 10W的高效率單聲道橋接音頻功率放大器 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大小： | 472K |
| 代理商： | LM4668 |
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
Storage Temperature
Input Voltage
Power Dissipation (Note 3)
ESD Susceptibility (Note 4)
ESD Susceptibility (Note 5)
16V
65C to +150C
0.3V to V
DD
+0.3V
Internally limited
2000V
200V
Junction Temperature (LD and MH)
Thermal Resistance
θ
JC
θ
JA
150C
2C/W
40C/W
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage (Note 10)
40C
≤
T
A
≤
85C
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, R
L
= 8
, and f
IN
= 1kHz,
unless otherwise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4668
Units
(Limits)
Typical
(Note 6)
Limit
(Notes 7,
8)
65
I
DD
I
SD
A
V
Quiescent Power Supply Current
Shutdown Current
Amplifier Gain
V
IN
= 0V, I
O
= 0A, R
L
= 8
V
SHUTDOWN
= GND (Note 9)
BTL output voltage with respect to input
voltage, V
IN
= 100mV
p-p
THD+N = 1% (max)
THD+N = 10%, V
DD
= 14V
P
OUT
= 1W
RMS
P
OUT
= 6W, post filter,
-3dB relative to the output amplitude
at 1kHz, See Figure 1
P
OUT
= 6W, including output filter
A-Weighted Filter, V
IN
= 0V
A-Weighted Filter, P
OUT
= 6W
A
V
= 30dB
V
RIPPLE
= 20mV
p-p
, C
BYPASS_1
= 10μF,
input referred
f = 50Hz
f = 60Hz
f = 100Hz
f = 120Hz
f = 1kHz
C
BYPASS
= 10μF
30
0.15
30
mA (max)
mA
dB (max)
dB (min)
W (min)
W
%
Hz
Hz
32
28
5
P
O
Output Power
6
10
0.2
20
20000
THD+N
f
BW
Total Harmonic Distortion + Noise
Frequency Response Bandwith
η
éN
SNR
Efficiency
Output Noise
Signal-to-Noise Ratio
79
220
90
%
μV
dB
PSRR
Power Supply Rejection Ratio
79
82
85
84
75
600
dB
t
WU
T
SD
Wake-Up time
Thermal Shutdown Temperature
ms
170
C (min)
C (max)
V (min)
V (max)
V
SDIH
V
SDIL
Shutdown Voltage Input High
Shutdown Voltage Input Low
4
1.5
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 andAC 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 T
,
θ
, and the ambient temperature T
. The maximum
allowable power dissipation is P
= (T
T
)/
θ
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4668 typical application
(shown in Figure 1) with V
DD
= 12V, R
L
= 8
stereo operation, the total power dissipation is 900mW.
θ
JA
= 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).
L
www.national.com
3
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