Functional overview

AN2530

4/13

greater than or equal to 16 V is acceptable. The construction details of L1 and Tr1 are

discussed later.

Refer to Figure 3 for the full electrical schematic of this converter.

Table 1.

Bill of materials (BOM)

Qty.

Ref.

Part

Qty.

Ref.

Part

Qty.

Ref.

Part

1

AC

1

C22

0.47 µ

R16

10 K

Ω

2

Cac1

1 nF/400 V

2

C26b

4700 pF / 2 KV

R18

10 K

Ω

Cac2

1 nF/400 V

C26a

4700 pF / 2 KV

R23

10 K

Ω

1

C1

220 µF / 400 V

1

DC

24VDC

1

R10

20 K

Ω

1

C4

1 µ

1

D1

W08G

1

R11

100 K

Ω

1

C8

47 µF

1

D2

STPS20H100CT

2

R13

15

3

C10

100 nF

1

D3

1N4148

R15

15

C12

100 nF

1

D4

18 V

1

R17

39 K

Ω

C20

100 nF

1

L1

51 µ

4

R19d

1

1

C11

1 nF

2

Q2

STP8NM60N

R19c

1

2

C15

220 p

Q1

STP8NM60N

R19b

1

C13

220 p

1

R2

150 K

Ω/2 W

R19a

1

1

C14

0.22 µ

1

R3

10

1

R21

3.6 K

Ω

1

C16

100 n

1

R4

150 K

Ω

2

R25

1 K

Ω

3

C17

33 n

1

R5

7.5 K

Ω

R22

1 K

Ω

C18

33 n

2

R8

27 K

Ω

1

R24

1.2 K

Ω

C23

33 n

R6

27 K

Ω

1

Tr1

Transformer

3

C19c

470 µ

1

R7

6.8 K

Ω

1

U1

L6598

C19b

470 µ

6

R9

10 K

Ω

1

U2

PC817

C19a

470 µ

R12

10 K

Ω

1

U3

TL431

1

C21

82 n

R14

10 K

Ω