參數(shù)資料
型號(hào)： L78XX
廠商： 意法半導(dǎo)體
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： 5.0 AMP POSITIVE VOLTAGE REGULATOR
中文描述： 5.0放大器正電壓穩(wěn)壓器
文件頁(yè)數(shù)： 20/23頁(yè)
文件大?。?/td> 264K
代理商： L78XX
Figure30 :
Power AM Modulator(unityvoltage
gain, I
o
< 1A).
Figure 31 :
AdjustableOutput Voltage with
TemperatureCompensation.
NOTE:
The circuit performs wellup to 100KHz
NOTE:
Q
2
is connected as a diode in order to compensate the
variation of the Q
1
V
BE
with the temperature. C allows a slow rise-
time ofthe V
o
Figure32 :
Light Controllers (V
o min
= V
xx
+ V
BE
).
Figure33 :
Protectionagainst Input Short-circuit
with High CapacitanceLoads.
Application with high capacitance loads and an output voltage
greater than 6 volts need an external diode (see fig. 33) to protect
the deviceagainst input short circuit. In this case the input voltage
falls rapidly while the output voltage decrease slowly. The
capacitance dischrges by means of the Base-Emitter junction of
the series pass transistor in the regulator. If the energy is
sufficently high, the transistor may be destroyed. The external
diode by-passes the current from the IC toground.
V
O
falls when the light goes up
V
O
rises when the light goes up
V
O
= V
XX
(
1
+
R
2
R
1
) +
V
BE
L7800
20/25
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L78XX_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Positive voltage regulators
L78XX_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Positive voltage regulators
L78XXAB 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Precision 1 A regulators
L78XXC 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Positive voltage regulators
L7900 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:NEGATIVE VOLTAGE REGULATORS
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