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參數(shù)資料
| 型號： | TN5D51A |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5 A SWITCHING REGULATOR, 180 kHz SWITCHING FREQ-MAX, ZFM5 |
| 封裝： | TO-220FI, 5 PIN |
| 文件頁數(shù)： | 11/11頁 |
| 文件大小： | 142K |
| 代理商： | TN5D51A |
TN5D51A
No. A1031-9/11
Example of Over-voltage Protection Circuit.
Generally, in constant-voltage power supply circuit, output voltage will become higher than the specified value (over-
voltage state) in case of any failures or PC board solderability defects. To minimize the damage caused by this over
voltage, we recommend setting an over-voltage protection circuit.
In designing, the following confirmations are necessary in actual circuit.
1) How the over-voltage protection circuit operates and its effects.
2) Is there any malfunction due to ambient temperature change of each device or exogenous noises?
Over-voltage Protection Circuit Example
Example of Over-voltage Protection Circuit
The thyristor will operate when it accept an over-voltage (VOUT) signal, then the fuse is melted and the input power is cut
off, then the operation of IC1 is stopped.
Continued on next page.
VIN
GND
IT12639
VOUT
FUSE
F1
C
ZD
R
THYRISTOR
Constant-voltage
power supply
+
VIN
GND
IT12640
VOUT
1
THYRISTOR
FUSE
F1
IC1
5
23 4
C
ZD
R
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