參數(shù)資料
型號(hào): L7820
廠商: 意法半導(dǎo)體
英文描述: Positive Voltage Regulators(三端穩(wěn)壓器)
中文描述: 正電壓調(diào)節(jié)器(三端穩(wěn)壓器)
文件頁(yè)數(shù): 40/52頁(yè)
文件大?。?/td> 1800K
代理商: L7820
Typical performance
L78xx - L78xxC
40/52
1.
Application with high capacitance loads and an output voltage greater than 6 volts need an external diode
(see fig. 32) to protect the device against input short circuit. In this case the input voltage falls rapidly while
the output voltage decrease slowly. The capacitance discharges by means of the Base-Emitter junction of
the series pass transistor in the regulator. If the energy is sufficiently high, the transistor may be destroyed.
The external diode by-passes the current from the IC to ground.
Figure 37.
Protection against input short-circuit with high capacitance loads
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