5

12/12

Please read Cautions and warnings and

Important notes at the end of this document.

With:

Maximum magnetic flux density in the ferrite core of the current sense transformer

G

max

Maximum duty cycle

Number of turns of the secondary winding of the current sense transformer

Effective magnetic area of the ferrite core

Operating frequency of the switching operator IC

With:

Resistance of burden resistor

Number of turns on the secondary side of the CT

Maximum primary current (peak current)

Characteristics and ordering codes

PH

Turns ratio

DC resistance

Voltage-

time product

Recomm.

Ordering code

primary

secondary

V

33

1 : 20

2.5

320

5.76

20

B82801A0333A020

74

1 : 30

2.5

800

8.6

30

B82801A0743A030

132

1 : 40

2.5

1300

11.5

40

B82801A0134A040

205

1 : 50

2.5

2200

14.4

50

B82801A0214A050

295

1 : 60

2.5

3600

17.3

60

B82801A0304A060

400

1 : 70

2.5

4600

20.0

70

B82801A0404A070

820

1 : 100

2.5

8700

28.8

100

B82801A0824A100

1280

1 : 125

2.5

13000

36.0

125

B82801A0135A125

1840

1 : 150

2.5

21000

43.2

150

B82801A0185A150



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B82801A

SMT current sense transformers

EE 4.2