AN-073E Rev.1.1

April-2011

21

Fuji Electric Co., Ltd.

http://www.fujielectric.co.jp/products/semiconductor/

FA5695

(2) Example of GND wiring around IC

(Note)

This wiring example is to make users understand the idea of GND wiring. The occurrence conditions of noise and

malfunction are different depending on each application circuit, and it is not to guarantee that all application circuit

will normally operate even if you use this wiring example (Fig. 32).

13 Example of application circuit

Fig.32 Good example of GND wiring around IC

Fig.33 Bad example of GND wiring around IC

FB COMP RT

OVP

VCC OUT GND

IS

SPC7011F

FA5695

L101

TH101

D101

C201

L201

R207

D204

IC201

C210

90 to 264Vac

5D22

600V25A

1µ

180µH

100

22

390 V

200 W

FB

COMP

RT

OVP

VCC

OUT

GND

IS

1000p

VCC

GND

J101

J201

L102

F101

6.3A

R101

R102

R103

C101

ZT101

C102

C103

C104

C105

C106

D201

R215

R216

R217

R218

R219

R220 47k

VR201

C202

2200k

R221 3.9k

220u

Q201

R208

R209

D203

47k

C211

56u

R214

100k

C209

0.1u

R201

0.068

R213

47

C208

2200p

R211

47k

C212

0.01u

0.15u

C205

C206

0.15u

R210

68k

510k

510k

510k

1000p

1000p

0.47u

0.47u

2200p

2200p

J202

D205

1

3

1

4

2

1

L

N

GND

ERA91-02

FMH21N50ES

YG952S6RP

2200k

R222

R223

R224

R225

R226

2200k

2200k

680k

51k

C214

1000p

680k

R227

680k

C213

220p

SPC7011F

L101

TH101

D101

C201

L201

R207

D204

IC201

C210

90 to 264Vac

5D22

600V25A

1µ

180µH

100

22

390 V

200 W

FB

COMP

RT

OVP

VCC

OUT

GND

IS

1000p

VCC

GND

J101

J201

L102

F101

6.3A

R101

R102

R103

C101

ZT101

C102

C103

C104

C105

C106

D201

R215

R216

R217

R218

R219

R220 47k

VR201

C202

2200k

R221 3.9k

220u

Q201

R208

R209

D203

47k

C211

56u

R214

100k

C209

0.1u

R201

0.068

R213

47

C208

2200p

R211

47k

C212

0.01u

0.15u

C205

C206

0.15u

R210

68k

510k

510k

510k

1000p

1000p

0.47u

0.47u

2200p

2200p

J202

D205

1

3

1

4

2

1

L

N

GND

ERA91-02

FMH21N50ES

YG952S6RP

2200k

R222

R223

R224

R225

R226

2200k

2200k

680k

51k

C214

1000p

680k

R227

680k

C213

220p

SPC7011F

L101

TH101

D101

C201

L201

R207

D204

IC201

C210

90 to 264Vac

5D22

600V25A

1µ

180µH

100

22

390 V

200 W

FB

COMP

RT

OVP

VCC

OUT

GND

IS

1000p

VCC

GND

J101

J201

L102

F101

6.3A

R101

R102

R103

C101

ZT101

C102

C103

C104

C105

C106

D201

R215

R216

R217

R218

R219

R220 47k

VR201

C202

2200k

R221 3.9k

220u

Q201

R208

R209

D203

47k

C211

56u

R214

100k

C209

0.1u

R201

0.068

R213

47

C208

2200p

R211

47k

C212

0.01u

0.15u

C205

C206

0.15u

R210

68k

510k

510k

510k

1000p

1000p

0.47u

0.47u

2200p

2200p

J202

D205

1

3

1

4

2

1

L

N

GND

ERA91-02

FMH21N50ES

YG952S6RP

2200k

R222

R223

R224

R225

R226

2200k

2200k

680k

51k

C214

1000p

680k

R227

680k

C213

220p

SPC7011F

FA5695

FB

COMP

RT

OVP

VCC

OUT

GND

IS

SPC7011F

FA5695