5/17

AN1842 APPLICATION NOTE

60Hz - full load

50Hz - full load

CH2:

CH3:

CH4:

CH2:

CH3:

CH4:

Cross regulation

In the following tables it has been reported the output voltage cross regulation measurements with static

loads. The overall efficiency of the converter is also calculated at the nominal input voltages.

To check the application circuit it has been tested keeping constant the current on the 5V and varying the

12V load. As visible in both tables, the voltages are within their tolerance at any load condition and the

circuit efficiency is good

.

5V ± 2%

12V ± 10%

TOLERANCE

115 Vac

Vout

[V]

@Iout

[A]

Vout

[V]

@Iout

[A]

[W]

Pin

[W]

Efficiency

Vaux

[V]

fs

[KHz]

5.106

2

12.11

4

OK

58.65

71.7

81.8%

18.3

51

5.107

2

12.23

3

OK

46.90

56.6

82.9%

17.4

51

5.108

2

12.40

2

OK

35.02

42.1

83.2%

16.7

51

5.110

2

12.72

1

OK

22.94

27.7

82.8%

16.5

51

5.110

2

13.11

0.5

OK

16.78

20.7

81.0%

16.6

51

5.108

1

11.85

4

OK

52.51

63.9

82.2%

17.5

51

5.108

1

12.00

3

OK

41.11

49.4

83.2%

16.7

51

5.110

1

12.15

2

OK

29.41

35.0

84.0%

16.2

51

5.112

1

12.39

1

OK

17.50

21.0

83.3%

15.9

51

5.112

1

12.66

0.5

OK

11.44

14.0

81.7%

15.9

51