MC7818E Просмотр технического описания (PDF) - Fairchild Semiconductor

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Компоненты Описание

производитель

MC7818E

3-Terminal 1A Positive Voltage Regulator

Fairchild Semiconductor 

MC78XXE/LM78XXE/MC78XXAE

Input

Q1 BD536

IQ1

R1

1

3

MC78XXE/LM78XXE

3Ω

IREG

2

0.33uF

IO = IREG+BQ1(IREG - VBEO1/R1)

Figure 12. High Current Voltage Regulator

Input

RSC

Q1

IO

0.1uF

Output

VBEQ1

R1 = IREG - IQ1 BQ1

Q2

R1

3Ω

Q1 = TIP42

Q2 = TIP42

VBEQ2

RSC= ISC

3

MC78XXE/LM78XXE

0.33uF

2

0.1uF

Figure 13. High Output Current with Short Circuit Protection

Output

1

3

VI

MC78XXE/LM78XXE

VO

2

0.33uF

0.1uF

4.7KΩ

COMMON

7

_2

6

LM741

4

+

3

4.7KΩ

COMMON

-VIN

TIP42

-VO

Figure 14. Tracking Voltage Regulator

21

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