1

1

2

2

3

3

4

4

D

D

C

C

B

B

A

A

Title

Number

Revision

Size

A

Date:

2005-10-07

Sheet of

File:

D:\uploads\..\dc_dc_stepup.Sch

Drawn By:

COMP

1

Vfb

2

Isense

3

Rt/Ct

4

GND

5

OUT

6

Vcc

7

Vref

8

UC384X

U2

470p

C7

u1

C2

100p

C8

4n7

C6

10k

R3

22

R7

150k

R4

1k

R1

7k5

R5

1k

R2

GND

GND

GND

GND

1

R8

1

R9

1

R10

1

R11

GND

1

R12

GND

10n

C5

GND

u1

C1

10

R6

GND

IRF540

Q1

50uH

L2

MBRS320

D1

22u

C9

22u

C10

22u

C11

22u

C12

GND

GND

GND

GND

1m/16V

C4

GND

F_POLYSWITCH

F1

1

2

CON2

J1

GND

20V

D2

GND

u1

C3

GND

1
2

CON2

J2

GND

50uH

L1

COMP

1

Vfb

2

Isense

3

Rt/Ct

4

GND

5

OUT

6

Vcc

7

Vref

8

UC384X

U1

SHOTTKY_DOUBLE

D3

1m/25V

C13

GND

LED
D4

1k

R13

GND