L6590

20/23

Figure 40. 7.2V/7W Battery Charger

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

≈ 1 mm gap for a primary inductance of 2.6 mH

Primary : 230 T, 2 series windings 115T each, AWG36

(∅ 0.16 mm)

Sec : 13 T, AWG23 (

∅ 0.64 mm)

Aux : 60 T, AWG36

7.2 Vdc / 1 A

C3

10 µF

25V

C4

2.2 nF

Y1 class

C8 680 nF

D1

BZW06-154

D3 BAV21

D4 1N5821

OP1

PC817

C5, C6

330 µF

16V

R1

39

Ω

C3 10 nF

T1

16:1

D2

STTA106

BD1

DF06M

Vin

88 to 264 Vac

F1

2A/250V

L

22 mH

100 nF

100 nF

C1

22 µF

400 V

R9

22.6 k

Ω

R13

12 k

Ω

C2

220 nF

R2

5.6 k

Ω

R3

1.5 k

Ω

R4 10 k

Ω

1

2

IC2

TSM103

3

8

4

2

1

D5

1N4148

D6

1N4148

D7

1N4148

D8

BZX79C12

C7

10 µF

25V

C9 330 nF

R5

4.7 k

Ω

34

R6

0.1

Ω

R10

6.8 k

Ω

R7

620

Ω

R11

11.8 k

Ω

R8

560

Ω

R12

1k

Ω

7

6

5

Q1

BC337

3(4)

1

4(7)

5

(8)

6, 7, 8

(9 to 16)

L6590

(L6590D)