HP1-1400L Datasheet, PDF (9/10 Pages) Coilcraft lnc. – Hexa-Path Magnetics

Document 613-9
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
Create a 100 Watt, 1 : 2, half bridge forward converter transformer with center tapped secondary
Choose HP6-2400L
Vin = 36 – 57 Vdc; Vout = 24 V, 4.2 A
Part
number
HPH6-2400L
Inductance
(µH)
194 ±25%
DCR Volt-time Peak energy
max product storage Isat
(Ohms) (V-µsec)
(µJ)
(A)
0.030 131.9
N/A
N/A
Irms
(A)
2.90
Connecting primary windings in parallel
When primary windings (W_pri) are connected in parallel, DCR decreases,
current ratings increase, and inductance and volt-time product remain
the same.
Example: For HPH-2400L, connect two primary windings in parallel:
Inductance = Inductance_table
= 194 µH
DCR = 1 ÷ [W_pri × (1 ÷ DCR_table)]
= 1 ÷ [(2 × (1 ÷ 0.030)] = 0.015 Ohms
VT = VTtable
= 131.9 V-µsec
Irms = Irms_table × W_pri
= 2.90 × 2 = 5.8 A
Connecting secondary windings in series
When secondary windings (W_sec) are connected in series, Irms
remains the same, but DCR increases.
Example: For HP6-2400L, connect four secondary windings in series,
creating a center tap at pins 9 and 5. For each half of the secondary:
DCR = DCR_table × W_sec
= 0.030 × 2 = 0.060 Ohms
Irms = Irms_table
= 2.9 A
3
1
2
Pri
11
12
10
4
Sec A
9
5
8
6
Sec B
7
Primary:
L = 194 µH
DCR = 0.015⏲
Irms = 5.8 A
VT = 131.9 V-µsec
Each half secondary;
Sec A (3-9), Sec B5-7):
DCR = 0.06⏲
Irms = 2.9 A
© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Document 613-9 Revised 01/23/09