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參數(shù)資料
| 型號： | LDC08A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 3W Audio Power Amplifier with Shutdown Mode |
| 中文描述： | 3W音頻功率放大器關(guān)斷模式 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大小： | 543K |
| 代理商： | LDC08A |
Electrical Characteristics V
DD
= 3V
(Notes 2, 3)
The following specifications apply for V
DD
= 3V and R
L
= 8
unless otherwise specified. Limits apply for T
A
=
25C. (Continued)
Symbol
Parameter
Conditions
LM4991
Typical
(Note 7)
Limit
(Note 8)
Units
(Limits)
PSRR
Power Supply Rejection
Ratio
V
RIPPLE
= 200mV sine p-p,
Input terminated with 10
,
f = 1kHz
68
dB
Electrical Characteristics V
DD
= 2.6V
(Notes 2, 3)
The following specifications apply for V
DD
= 2.6V and R
L
= 8
unless otherwise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4991
Typical
(Note 7)
2
3
0.1
1
0.9
5
Limit
(Note 8)
Units
(Limits)
I
DD
Quiescent Power Supply
Current
V
IN
= 0V, no Load
V
IN
= 0V, R
L
= 8
V
SHUTDOWN
= V
DD
mA (max)
I
SD
V
SDIH
V
SDIL
V
OS
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
μA(max)
V
V
mV (max)
35
P
o
Output Power
THD = 1% (max), f = 1kHz
R
L
= 4
R
L
= 8
400
300
mW
THD+N
Total Harmonic
Distortion+Noise
Power Supply Rejection
Ratio
P
O
= 0.15W, f = 1kHz
0.1
%
PSRR
V
RIPPLE
= 200mV sine p-p,
Input terminated with 10
,
f = 1kHz
51
dB
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:
All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 4:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
,
θ
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
= (T
–T
A
)/
θ
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4991, T
JMAX
= 150C.
For the
θ
JA
’s for different packages, please see the
Application Information
section or the
Absolute Maximum Ratings
section.
Note 5:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 6:
Machine Model, 220pF–240pF discharged through all pins.
Note 7:
Typicals are specified at 25C and represent the parametric norm.
Note 8:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 9:
The given
θ
JA
is for an LM4991 packaged in an LDC08A with the Exposed–DAP soldered to an exposed 1in
2
area of 1oz printed circuit board copper.
Note 10:
When driving 3
or 4
loads from a 5V supply, the LM4991LD must be mounted to a circuit board.
L
www.national.com
4
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