參數(shù)資料
型號(hào)： LM2005T-S
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： LM2005 20 Watt Automotive Power Amplifier
中文描述： 12 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM11
封裝： POWER, PLASTIC, TO-220, 11 PIN
文件頁(yè)數(shù)： 5/8頁(yè)
文件大?。?/td> 205K
代理商： LM2005T-S
External Components
(Figure 2)
Components
Comments
1. R1, R2
Sets voltage gain,
R5, R4
A
V
j
1
a
ê
R
A
V
e
1
a
ê
R
Where R’ is the equivalent resistance
of R2 in parallel with an internal 10k
resistor:
R
ê
e
10k
#
R2
R2
a
10k
If R2
m
10k, then
.
A
V
j
1
a
R2
R1
.
2. R3
Adjusts output symmetry for maximum
power output.
3. R
O
, C
O
Works to stabilize internal output
stage. Necessary for stability. C
O
should be ceramic disc or equivalently
good high frequency capacitor.
4. C1, C9
Input coupling capacitor. Low
frequency pole set by
F
L
1
e
1
2
q
Z (non-inverting) C1
Decreasing capacitor value will also
increase noise.
.
Components
5. C4, C5
Comments
Bootstrap capacitors, used to increase
drive to output stage.
6. C3
Improves power supply rejection.
Increasing C3 increases turn-on delay
(approximately 2 ms per
m
F).
7. C2, C6
Inverting input DC decouple. Low
frequency pole:
F
L
2
e
1
2
q
Z(inverting)C2
Z (inverting)
&
10 k
X
.
.
8. C
C
Output coupling capacitor. Isolates
pins 10 and 8 from load. Low
frequency pole;
F
L
3
e
1
2
q
R
L
C
C
.
9. C
S
Power supply filtering.
Typical Applications
(Continued)
TL/H/5129–4
FIGURE 2. 10W/Channel Stereo Amplifier Application and Test Circuit
5
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