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參數(shù)資料
| 型號： | AN7199 |
| 廠商： | Panasonic Corporation |
| 英文描述： | Dual 20 W BTL power IC for car audio |
| 中文描述： | 雙20瓦橋接的汽車音響電源IC |
| 文件頁數(shù)： | 16/17頁 |
| 文件大?。?/td> | 131K |
| 代理商： | AN7199 |
AN7199Z
ICs for Audio Common Use
16
I
Technical Information (continued)
[2] Application note (continued)
11. Two IC use (continued)
1) Supply terminal
Short-circuiting each other, insert an electrolytic capacitor of approx. 2 200
μ
F into the supply terminals.
However, if sufficient characteristics of the ripple rejection can not be obtained, use an even larger capacitor
or insert a 2 200
μ
F capacitor into each IC.
The best sound quality can be obtained by inserting a 2 200
μ
F capacitor near the terminal of each IC.
2) Standby terminal (pin 5)
Even if the standby terminals are connected with each other, that does not result in an abnormal operation.
Connect with the microcomputer after connecting the standby pins with each other. At that time, the current
flowing into the standby terminal is twice as large as the current which is described in 1. Standby function.
3) Muting terminal (pin 7)
An abnormal operation does not occur even if the muting terminals are short-circuited with each other.
The muting time constant changes when two ICs connection is made. If the CR constants are set at twice
and 1/2 time respectively, the time constant value becomes as same as the value when one IC is used.
In terms of safety design, taking advantage of the fact that a large current is difficult to flow when the mute
is being applied so that it is difficult to cause the destruction, it is designed so that the mute terminal will
become High when an abnormality such as the short-circuit to V
CC
or short-circuit to GND takes place. (To
avoid the influence of IC in an abnormal state when using two ICs).
Do not connect a microcomputer directly to the mute terminal because the mute terminal voltage rises to
approx. 12 V at that time.
4) Beep sound input terminal (pin 10)
Even if the the beep sound input terminals are short-circuited each other, that does not result in an abnormal
operation.
However, if there is a temperature difference between ICs, there may be a fluctuation of the output offset.
In order to avoid such a phenomenon, connect the ICs with each other through a resistor (47 k
).
5) Ripple filter terminal (pin 12)
Even if the ripple filter terminals are short-circuited each other, that does not result in an abnormal
operation.
However, if the standby of each IC is individually controlled, the short-circuiting is not allowed. Use the
circuit after connecting a capacitor (33
μ
F) to each IC.
12. Precautions on misuse
1) Erroneous connection in the case of short-circuit to V
CC
and short-circuit to GND or load short-circuit
The AN7198Z, AN7199Z have the breakdown voltage of 20 V or higher when an short-circuit to V
CC
and
short-circuit to GND or load short-circuit occur. However, there is a possibility of destruction, then smoke
emission and ignition under a special condition. Avoid misuse and erroneous connection of the circuit.
2) Power supply surge
The power supply surge breakdown voltage is evaluated by the test circuit shown in figure 10 and the surge
waveform as shown in figure 11 is evaluated.
The withstanding capability against power supply surge is 80 V for the AN7198Z, AN7199Z.
1
(allowance:
±
1
%
) 20 W
0.37 V
P
0 V
V
P
0.63 V
P
D.U.T
6 ms
1 ms
1
μ
F
1
±
1
%
)
Surge voltage
Figure 10. Power supply surge test circuit
Figure 11. Surge waveform
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| AN7199Z | Dual 20 W BTL power IC for car audio |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AN7199Z | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Dual 20 W BTL power IC for car audio |
| AN720 | 制造商:SILABS 制造商全稱:SILABS 功能描述:PRECISION32a?￠ OPTIMIZATION CONSIDERATIONS FOR CODE SIZE AND SPEED |
| AN7203 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM FRONT-END IC FOR RADIO, RADIO CASSETTE RECORDER |
| AN7204 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM Receiver Circuit |
| AN7205 | 制造商:Panasonic Industrial Company 功能描述:IC |
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