AN-087E Rev.1.0

April-2011

33

FA5526/5527/5528/5536/5537/5538

Fuji Electric Co., Ltd.

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

11. Example of an application circuit

The following circuit is common to both of FA5528 and FA5538. FA5526/27/28/36/37/38 can be used for same

topology

except the protection circuit and the transformer design which depends on switching frequency.

Note :

The example of an application circuit is intended to be used only for reference and not to guarantee performance or

characteristics.

Input power at no-load

0

50

100

150

200

250

50

100

150

200

250

300

Line Voltage (Vac)

Efficiency (Io=5A)

81

82

83

84

85

86

87

88

89

90

50

100

150

200

250

300

Line voltage (Vac)

Switching frequency at no-load

0

5

10

15

20

25

50

100

150

200

250

300

Line voltage (Vac)

Over Current Protection vs. AC Line Voltage

4.0

4.5

5.0

5.5

6.0

6.5

7.0

80

100 120 140 160 180 200 220 240 260 280

AC Line Voltage ( V )