L6668

20/23

Figure 46. Typical Application: 80W, WRM flyback; Electrical Schematic

Table 6. Light load measurements on the circuit of figure 46

5

Package information

age. This package has a Lead-free second level interconnect. The category of second level Interconnect

is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97.

The maximum ratings related to soldering conditions are also marked on the inner box label.

ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com.

Output power

Test condition

Input power

Pout = 0.5 W

Vin= 110 Vac

0.71 W

Vin= 230 Vac

0.86 W

Pout = 0 W

Vin= 110 Vac

0.09 W

Vin= 230 Vac

0.17 W

88 to264

Vac

BD1

DF04M

C1

100 µF

400 V

4

R710k

Ω

12

R12 1k

Ω

R13A,B

0.56

1/2

5

7

10

R4

330 k

Ω

815

16

C5

3.3 nF

R8

4.03 k

Ω

11

Q1

STP9NK65

C8A,B,C

680 µF

25 V

GND

L6668

C12

2.2 nF

Y1

D2

STTA106

R3 10

Ω

R5 47k

Ω

C2

47 µF

25 V

9

1

S-COMP

VREF

C4

100 nF

C6

56 nF

RCT

SS

R1

3 M

Ω

3

GND

ISEN

OUT

HV

VCC

DIS

COMP

SKIPADJ

T1

18V/4.5A

13

STBY

1

2

3

R15

1.2 k

Ω

R14

4.3 k

Ω

R18

1.3 k

Ω

C7

2.2 nF

C3 100 nF

C10

100 nF

R9

6.2 k

Ω

R17

8.06 k

Ω

R16

47 k

Ω

D3 1N4148

D4

STPS20150CT

R2

3 M

Ω

OC1

PC817A

TL431

N1

N2

N3

F1 T2A250V

NTC1

R6

9.1 k

Ω

C9

100 nF

J1

J2

D1

1.5KE200

6

N.C.

R10

82.5 k

Ω

R11

47 k

Ω

OC1

PC817A

88 to264

Vac

BD1

DF04M

C1

100 µF

400 V

4

R710k

Ω

12

R12 1k

Ω

R13A,B

0.56

1/2

5

7

10

R4

330 k

Ω

815

16

C5

3.3 nF

R8

4.03 k

Ω

11

Q1

STP9NK65

C8A,B,C

680 µF

25 V

GND

L6668

C12

2.2 nF

Y1

D2

STTA106

R3 10

Ω

R5 47k

Ω

C2

47 µF

25 V

9

1

S-COMP

VREF

C4

100 nF

C6

56 nF

RCT

SS

R1

3 M

Ω

3

GND

ISEN

OUT

HV

VCC

DIS

COMP

SKIPADJ

T1

18V/4.5A

13

STBY

1

2

3

R15

1.2 k

Ω

R14

4.3 k

Ω

R18

1.3 k

Ω

C7

2.2 nF

C3 100 nF

C10

100 nF

R9

6.2 k

Ω

R17

8.06 k

Ω

R16

47 k

Ω

D3 1N4148

D4

STPS20150CT

R2

3 M

Ω

OC1

PC817A

TL431

N1

N2

N3

F1 T2A250V

NTC1

R6

9.1 k

Ω

C9

100 nF

J1

J2

D1

1.5KE200

6

N.C.

R10

82.5 k

Ω

R11

47 k

Ω

OC1

PC817A