1

2

3

4

A

B

C

D

4

3

2

1

D

C

B

A

C

o

m

p

1

V

cc

7

Vfb

2

Output

6

Current sense

3

P

W

R

G

n

d

5

Rt/Ct

4

Vref

8

U1

UC3843

R4
27K

R7
10K

R8
20K

R1
10K

R3

10K

R2

150K

R10
100K

R9
0,1R

R11
9,1K

C6

2,2nF

C5
10nF

C3
100nF

C4

100nF

+ C2

1000uF

+ C1

1000uF

+ C9

220uF

+ C10

220uF

+ C8

220uF

2

1

3

Q1

MTP75N03HDL

R5

10R

D1
2045CT

L1

22uH

1

J3

+20V

1

J4

GND

1

J1

+12V

1

J2

GND

R6

1K

C7
470pF

WEJŚCIE

WYJŚCIE