HP1-1400L Datasheet, PDF (6/10 Pages) Coilcraft lnc. – Hexa-Path Magnetics

Document 613-6
Hexa-Path Magnetics
Formulas used to calculate electrical characteristics
Connecting windings in series
Inductance = Inductance_table × (number of windings)²
DCR = DCR_table × number of windings
Isat = (Isat_table × 6) ÷ number of windings connected in series
Irms = Irmstable
Connecting windings in parallel
Inductance = Inductance_table
DCR = 1 ÷ [number of windings × (1 ÷ DCR_table)]
Isat = (Isat_table × 6) ÷ number of windings connected in series
Irms = Irms_table × number of windings
Inductors – using multiple windings
Part
number
HP3-0138L_
Inductance
(µH)
11.2 ±20%
DCR
max
(Ohms)
0.055
Volt-time
product
(V-µsec)
30.4
Peak energy
storage
(µJ)
1.656
Isat
(A)
0.650
Irms
(A)
1.73
Connecting windings in series
For higher inductance, the windings can be connected in series. As inductance
increases, energy storage and Irms remain the same, but DCR increases and
Isat decreases.
Example: Calculate new electricals for HP3-0138L with four windings (W_n)
connected in series:
Inductance = Inductance_table × W_n2
= 11.2 × 4² = 179.2 µH
DCR = DCR_table × W_n
= 0.055 × 4 = 0.22 Ohms
Isat = (Isat_table) × 6 ÷ W_n
= (0.65 × 6) ÷ 4 = 0.975 A
Irms = Irms_table = 1.73 A
1
4
12
9
2
5
11
8
3
10
6
7
L = 179.2 µH
DCR = 0.22 ⏲
Isat = 0.975 A
Irms = 1.73 A
Connecting windings in parallel
To increase current ratings, the windings (Wn) can be connected in parallel.
DCR decreases, current ratings increase, and inductance remains the same.
Example: Calculate new electricals for HP5-0083L, with three (Wn) windings
connected in parallel (equivalent to one winding in series):
Inductance = Inductancetable
= 11.2 µH
DCR = 1 ÷ [Wn × (1 ÷ DCRtable)]
= 1 ÷ [3 × (1 ÷ 0.045)] = 0.015 Ohms
Isat = (Isattable × 6) ÷ Wn
= (0.65 × 6) ÷ 1 = 3.9 A
Irms = Irmstable × Wn
= 1.73 × 3 = 5.19 A
Specifications subject to change without notice.
Please check our website for latest information.
4
1
2
9
3
5
10
8
11
6
12
7
L = 11.2 µH
DCR = 0.015⏲
Isat = 3.9 A
Irms = 5.19 A
Document 613-6 Revised 01/23/09
© Coilcraft, Inc. 2009