B82801A824A100 Datasheet, PDF (5/9 Pages) EPCOS – SMT current sense transformers

SMT current sense transformers
B82801A
EE 4.2
B_max
=
V_{-----s--e--n---s--e----m----a--x----}˜_---G_{---m----a--x-}
n_s ˜ A_e ˜ f_osc
With:
B_max
Maximum magnetic flux density in the ferrite core of the current sense transformer
V_sense,max Maximum output voltage of the measurement signal
G_max
Maximum duty cycle
n_s
Number of turns of the secondary winding of the current sense transformer
A_e
Effective magnetic area of the ferrite core
f_osc
Operating frequency of the switching operator IC
Typical value for A_e: 1.44 x 10^-6 m²
Typical B_max: 200 mT
R_T
=
V_{-----s--e--n---s--e----m----a--x----}˜_---n_---s
I_{prim max}
With:
R_T
Resistance of burden resistor
V_sense,max Maximum output voltage of the measurement signal
n_s
Number of turns on the secondary side of the CT
I_prim,max Maximum primary current (peak current)
Characteristics and ordering codes
L_min
PH
33
74
132
205
295
400
820
1280
1840
Turns ratio
N_p : N_s
1 : 20
DC resistance
R_max (m:)
primary secondary
2.5
320
Voltage- Recomm.
time product R_T
V ˜ μs
5.76
20
Ordering code
B82801A0333A020
1 : 30
2.5
800
8.6
30
B82801A0743A030
1 : 40
2.5
1300
11.5
40
B82801A0134A040
1 : 50
2.5
2200
14.4
50
B82801A0214A050
1 : 60
2.5
3600
17.3
60
B82801A0304A060
1 : 70
2.5
4600
20.0
70
B82801A0404A070
1 : 100
2.5
8700
28.8
100
B82801A0824A100
1 : 125
2.5
13000
36.0
125
B82801A0135A125
1 : 150
2.5
21000
43.2
150
B82801A0185A150
Please read Cautions and warnings and
Important notes at the end of this document.
5 12/12