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參數(shù)資料
| 型號(hào)： | LA49032H |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| 封裝： | 0.375 INCH, HSOP-36 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大?。?/td> | 809K |
| 代理商： | LA49032H |
LA49032H
No. A1038-7/12
Sample Application Circuit
Description of external parts
C1to C4
Oscillation preventive capacitor, for which 0.1μF is recommended. Use also R1, 2, 3, and 4 simultaneously.
C5, C6
Amplifier input capacitor, for which 2.2μF is recommended. Note that, when varying the amplifier input,
the capacitor of 3.3
μF or less must be used so suppress the pop sound.
C7
Input reference amplifier capacitor. The value same as for C5, C6 is recommended.
C8
Amplifier ripple filter capacitor, for which 47μF is recommended.
C9
Amplifier on-time setting capacitor for which 22μF is recommended.
(The on-time period in this case is about 0.7s.)
The rise time may be shortened by lowering the capacitance. But the capacitance of 10
μF or more is
recommended because lowering of the capacitance may lead to the pop sound.
C10, R5
Switching regulator output smoothing capacitor. LA49032H uses the self-exciting switching regulator.
Since this capacitor influences the stability of self-excitation, the switching regulator with low equivalent
serial resistance (about 3
Ω or less) and superior in temperature characteristics at high frequency is
recommended. For the same reason, R5 2.2
Ω must be used simultaneously.
Continued on next page.
IN2
AMP
RippleFilter
ON TIME
IN -VREF
IN1
PRE GND
PRE VCC
VCC
SW OUT
SW E
SW B
SW GND
RB
10
Ω
33
32
31
30
29
28
27
26
25
24
23
22
21
16
15
14
13
12
11
10
9
8
7
6
5
Tj Monitor
Phase
Compensation 1
Phase
Compensation 2
4
3
2
1
35
36
18
17
19
20
34
OUT 1-
OUT 1+
POWER
GND1
OUT 2-
OUT 2+
POWER
GND2
CHP1
220
μF/10V
C11
1000PF
L1
180
μH
D1
Flywheel
Di
TR1
Switching
Transistor
VCC
HP
RippleFilter
HP OUT1
HP
Standby
HP IN2
HP OUT2
HP IN1
AMP
Standby
C1
0.1
μF
R1
2.2
Ω
NC
Speaker
16
Ω
Standby
0V
5V
Standby
0V
5V
Speaker
16
Ω
C2
0.1
μF
R2
2.2
Ω
C3
0.1
μF
R3
2.2
Ω
C4
0.1
μF
R4
2.2
Ω
CHP2
220
μF/10V
CHP4
1
μF/6.3V
CHP5
1
μF/6.3V
CHP3
47
μF/
25V
C5
2.2
μF/6.3V
C6
2.2
μF/6.3V
C7
2.2
μF/
6.3V
C8
47
μF/
25V
C9
22
μF/
6.3V
C10
2.2
μF/
25V
R5
2.2
Ω
C12
470
μF/
25V
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