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參數(shù)資料
| 型號： | AN8031 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Active filter control IC |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PSIP9 |
| 封裝： | PLASTIC, SIP-9 |
| 文件頁數(shù)： | 17/21頁 |
| 文件大?。?/td> | 205K |
| 代理商： | AN8031 |
17
Voltage Regulators
AN8031
I
Application Notes (continued)
[2] Operation descriptions (continued)
2. Protection circuit (continued)
2) Overvoltage protection (continued)
(3) Output voltage overshoot at start
At operation start, the output overload condition is created because the smoothing capacitor which is
connected to the output is charged. Under this condition the chopper circuit operates with full power.
However, it does not immediately come out of the full-power-operation due to control delay even when
the proper output voltage is obtained, causing the overshoot of output voltage.
The AN8031 overvoltage protector operates even at operation starts and prevents the worst cases
such as damage of used parts.(Refer to figure 12.)
Figure 12. Output voltage overshoot when operation starts
Time
Time
0 A
Start under output
short-circuit condition
→
Current peak value is high
0 A
Stop
Operating
Operating
Set output voltage
Overvoltage protector operation
Operation start
Overvoltage
condition
Output voltage of
active filter
Operation condition of
active filter
Power MOSFET current
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