COMPONENT LIST

R1

6.8k

R19

3.6k

C16

1

µF/50V

R2

1.8

R20

2.7k

C17

220nF

R3

10k

R21

10k

C18

1.2nF

R4

4.7

R21a

3k

C19

1

µF/50V

R5

27k

R22

3k

C20-22

220nF

R6

510

R23

3.09k (0.1%)

Q1

STP80N03L-06

R7

3.3

R24

6.19k (0.1%)

Q2

BC337

R8

4.7

R25

12.4k

Q3

BC327

R9

1k

R26

24.9k

D1

STPS20L25CT

R10

20k

R27

xx

D2-5

1N4148

R10a

2k

RR1

10k (5+1)

IC1

L4990A

R11

2k

C1-4

470

µF/25V HFQ Panasonic

IC2

LM339

R12

22k

C5-8

330

µF/6.3V SANYO-Oscon

IC3

M74HC125

R13

2k

C9

33nF

L1

77120(6T) Magnetics

R14

4.99k (0.1%)

C10

680pF

L2

40705-TC(50T) Magnetics

R15

2k

C11

150pF

L3

T38-52(4T) Micrometals

R16

10k

C12

220pF

R17

6.2k

C13

47

µF/50V

R18

6.2k

C14-15

5.6nF

Figure 6. PCB Layout - Xerigraphy (77.47 x 78.74mm)

AN908 APPLICATION NOTE

5/9