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L6590A

APPLICATION IDEAS

Figure 32. 15W Auxiliary SMPS for PC

Figure 33. 10W AC-DC Adapter

REFERENCES

[1] “Getting Familiar with the L6590 Family, High-voltage Fully Integrated Power Supply” (AN1261)

[2] “Offline Flyback Converters Design Methodology with the L6590 Family” (AN1262)

T1 specification

Core E20/10/6, ferrite 3C85 or N67 or equivalent

≈ 0.9 mm gap for a primary inductance of 2 mH

Primary : 200 T, 2 series windings 100T each, AWG33

(∅ 0.22 mm)

Sec : 9 T, 2 x AWG23 (

∅ 0.64 mm)

Aux : 21 T, AWG33

3

1

54

6, 7, 8

5Vdc / 3 A

C2

22 µF

25 V

C8

100 µF

10V

D1

BZW06-154

D3

1N4148

D4 STPS10L25D

OP1

PC817

L6590A

IC1

3

41

2

3

C5, C6, C7

470 µF

10 V

R1 10

Ω

C3

47 nF

L1

4.7 µH

T1

D2

STTA106

C9

470 nF

2

1

IC2

TL431

Vin = 200 to 375 Vdc

R2

1.8 M

Ω

R3

20 k

Ω

C1

10 nF

C4

2.2 nF

Y

R4

560

Ω

R5

2.43 k

Ω

R6

2.43 k

Ω

R7

240

Ω

T1 specification

Core E20/10/6, ferrite 3C85 or N67 or equivalent

≈0.5 mm gap for a primary inductance of 1.6 mH

Primary : 130 T, 2 series windings 65T each, AWG33

(∅ 0.22 mm)

Sec : 14 T, AWG26 (

∅ 0.4 mm)

Aux : 14 T, AWG33

3

1

54

6, 7, 8

C2

22 µF

25 V

D1

BZW06-154

D3

1N4148

OP1

PC817

L6590A

IC1

3

4

1

2

R1 10

Ω

C4

47 nF

T1

D2

STTA106

D5

BZX79C10

R2

1.8 M

Ω

R3

39 k

Ω

C3

10 nF

C5

2.2 nF

Y

R4

100

Ω

12 Vdc / 0.8 A

C6, C7

330 µF

16 V

D4 STPS3L60S

C8

100 µF

16 V

L1

4.7 µH

R5

1k

Ω

BD1

DF06M

Vin

88 to 264 Vac

F1

2A/250V

L

22 mH

100 nF

100 nF

C1

22 µF

400 V