L6590A datasheet(9/19 Pages) STMICROELECTRONICS

Part #	L6590A

Description	FULLY INTEGRATED POWER SUPPLY

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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L6590A

Figure 19. Coss vs. Drain Voltage

Figure 20. Standby Function Thresholds

0

100

200

300

400

500

600

700

0

50

100

150

200

250

Vdrain [V]

Coss [pF]

Tj = 25 °C

-50

0

50

100

150

60

80

100

120

140

160

180

200

220

Tj [°C]

Drain Peak Current [mA]

22 kHz

→ 65 kHz

65 kHz

→ 22 kHz

Figure 21. Test Board electrical schematic

3

1

5

4

6, 7, 8

5Vdc / 2 A

C2

22 µF

25V

C4

2.2 nF

Y1 class

C9

100 nF

R2

560

Ω

D1

BZW06-154

D3

1N4148

D4 1N5821

OP1

PC817

L6590A

IC1

3

1

2

3

R1 10

Ω

C3

22 nF

L1

4.7 µH

T1

D2

STTA106

BD1

DF06M

Vin

88 to 264 Vac

F1

2A/250V

L

22 mH

CxA

100 nF

CxB

100 nF

C1

22 µF

400 V

4

2

1

IC2

TL431

R3

2.43 k

Ω

R4

2.43 k

Ω

R5 1.8 M

Ω

R6 39 k

Ω

R5

2k

Ω

C8

220 µF

10V

Rubycon

ZL

C5, C6, C7

470 µF

16V

Rubycon ZL

R6

6.8 k

Ω

T1 specification

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

≈0.6 mm gap for a primary inductance of 1.4 mH

Lleakage <30 µH

Primary : 128 T, 2 series windings 64T each, AWG32

(∅ 0.22 mm)

Sec : 6 T, 4xAWG32

Aux : 14 T, AWG32

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L6590A Datasheet(PDF) 9 Page - STMicroelectronics

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