ICP-S ROHM Electronics, ICP-S Datasheet - Page 6

• Manufacturer Part Number: ICP-S
• Description: Overcurrent Protection Elements
• Manufacturer: ROHM Electronics

Overcurrent Protection Elements
6. I
2
t Calculation of a Variety of Wave forms
1) Triangular
2) Rectangular
3) Irregular
4) Charged or
wave form
wave form
wave form
discharged
wave form
If the steady-state current includes a pulse, surge, or inrush current, calculate the I
the wave form of the current. The following graphs and formulas show how to calculate
a variety of wave forms.
0
0
0
• The charged wave form is segmented as shown below. The Joule heat
generated during each segmented period is plotted onto a Joule integral
sheet.
1
t
2
t
Im
Im
t
I2
3
Segments 1 through 4 are treated as
irregular wave forms and calculated,
while segment 5 is treated as a
triangular wave form and calculated.
I1
4
5
ICP-S Technical Manual
I
I
I
2
2
2
t =
t = Im
t = I
1
1
3
I
2
2
Im
t +
t
2
t
1
3
(I
1
Rev.A
− I
2
)
2
t
2
t of
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