COILCRAFT HP1

Document 613-1
Hexa-Path Magnetics
HP3, HPH3
• Six 1 :1 isolated windings that can be
connected in series or parallel
• Tightly coupled windings
• 500 Vrms isolation between each
winding
• Power range: 5 – 50 Watts as inductor
and flyback transformer; up to
150 Watts as forward transformer
• Frequency range up to 1 MHz
These off-the shelf parts can be used
to create thousands of configurations, providing a convenient method
for designers to create custom magnetics. By connecting the windings
in series or parallel, the Hexa-Path
components can be configured as
inductors, coupled inductors and
transformers for use in virtually any
application: flyback, buck/boost,
push-pull, forward, full and half
bridge, Cuk, and SEPIC.
There are six different sizes available with five HP parts and five HPH
parts in each size. The HP offers
lower DCR and higher Irms ratings.
The HPH offers higher inductance and
greater energy storage capabilities.
HP4, HPH4
HP5, HPH5
HP6, HPH6
Winding Layouts
HP1, HP2, HPH1, HPH2
HP3, HP4, HP5, HP6
HPH3, HPH4, HPH5, HPH6
Outer
Outer
6
7
6
7
5
8
9
5
8
11
8
4
9
10
7
6
3
3
10
5
2
2
11
2
11
4
1
1
12
1
12
12
Middle
Inner
One 6-filar winding
4
9
3
10
Inner
Two trifilar windings
Three bifilar windings
Current Derating
120
110
100
90
80
70
60
50
40
30
25°C
HP2, HPH2
Percent of rated current
HP1, HPH1
20
10
0
-40
-20
0
20
40
60
80
100
120 140
Ambient temperature (°C)
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-1
Revised 01/23/09
Document 613-2
Hexa-Path Magnetics
Part
number1
HP1-1400L_
HP1-0190L_
HP1-0102L_
HP1-0076L_
HP1-0059L_
HP2-1600L_
HP2-0216L_
HP2-0116L_
HP2-0083L_
HP2-0066L_
HP3-0950L_
HP3-0138L_
HP3-0084L_
HP3-0055L_
HP3-0047L_
HP4-1150L_
HP4-0140L_
HP4-0075L_
HP4-0060L_
HP4-0047L_
HP5-1200L_
HP5-0155L_
HP5-0083L_
HP5-0067L_
HP5-0053L_
HP6-2400L
HP6-0325L
HP6-0158L
HP6-0121L
HP6-0090L
HPH1-1400L_
HPH1-0190L_
HPH1-0102L_
HPH1-0076L_
HPH1-0059L_
HPH2-1600L_
HPH2-0216L_
HPH2-0116L_
HPH2-0083L_
HPH2-0066L_
HPH3-0950L_
HPH3-0138L_
HPH3-0084L_
HPH3-0055L_
HPH3-0047L_
HPH4-1150L_
HPH4-0140L_
HPH4-0075L_
HPH4-0060L_
HPH4-0047L_
HPH5-1200L_
HPH5-0155L_
HPH5-0083L_
HPH5-0067L_
HPH5-0053L_
HPH6-2400L
HPH6-0325L
HPH6-0158L
HPH6-0121L
HPH6-0090L
Inductance2
(µH)
89.6 ±25%
12.2 ±20%
6.5 ±15%
4.9 ±10%
3.8 ±5%
78.4 ±25%
10.6 ±20%
5.7 ±15%
4.1 ±10%
3.2 ±5%
77.0 ±25%
11.2 ±20%
6.8 ±15%
4.5 ±10%
3.8 ±5%
93.2 ±25%
11.3 ±20%
6.1 ±15%
4.9 ±10%
3.8 ±5%
76.8 ±25%
9.9 ±20%
5.3 ±15%
4.3 ±10%
3.4 ±5%
86.4 ±25%
11.7 ±20%
5.69 ±15%
4.36 ±10%
3.24 ±5%
202
±25%
27.4 ±20%
14.7 ±15%
10.9 ±10%
8.5 ±5%
160
±25%
21.6 ±20%
11.6 ±15%
8.3 ±10%
6.6 ±5%
160
±25%
23.6 ±20%
14.2 ±15%
9.3 ±10%
7.94 ±5%
194
±25%
23.7 ±20%
12.7 ±15%
10.1 ±10%
7.94 ±5%
173
±25%
22.3 ±20%
12.0 ±15%
9.65 ±10%
7.63 ±5%
194
±25%
26.3 ±20%
12.8 ±15%
9.8 ±10%
7.29 ±5%
DCR
max3
(Ohms)
0.130
0.130
0.130
0.130
0.130
0.085
0.085
0.085
0.085
0.085
0.055
0.055
0.055
0.055
0.055
0.055
0.055
0.055
0.055
0.055
0.045
0.045
0.045
0.045
0.045
0.020
0.020
0.020
0.020
0.020
0.340
0.340
0.340
0.340
0.340
0.155
0.155
0.155
0.155
0.155
0.125
0.125
0.125
0.125
0.125
0.078
0.078
0.078
0.078
0.078
0.070
0.070
0.070
0.070
0.070
0.030
0.030
0.030
0.030
0.030
Volt-time Peak energy
product4
storage5
(V-µsec)
(µJ)
23.4
Note 8
23.4
29.8
23.4
55.1
23.4
74.7
23.4
93.8
44.0
Note 8
44.0
79.2
44.0
184
44.0
228
44.0
252
30.4
Note 8
30.4
59.6
30.4
111
30.4
156
30.4
173
47.3
Note 8
47.3
142
47.3
307
47.3
386
47.3
490
62.8
Note 8
62.8
281
62.8
562
62.8
626
62.8
946
87.9
Note 8
87.9
332
87.9
981
87.9
1485
87.9
1833
35.1
Note 8
35.1
31.1
35.1
60.2
35.1
99.2
35.1
107
30.8
Note 8
30.8
82.3
30.8
177
30.8
302
30.8
333
43.9
Note 8
43.9
52.5
43.9
98.0
43.9
169
43.9
196
68.3
Note 8
68.3
138
68.3
314
68.3
368
68.3
529
94.2
Note 8
94.2
248
94.2
546
94.2
700
94.2
809
131.9
Note 8
131.9
477
131.9
1176
131.9
1783
131.9
1944
Isat6
(A)
Note 8
0.440
0.820
1.10
1.40
Note 8
0.770
1.60
2.10
2.50
Note 8
0.650
1.14
1.66
1.90
Note 8
1.00
2.00
2.50
3.20
Note 8
1.50
2.90
3.40
4.70
Note 8
1.50
3.70
5.20
6.70
Note 8
0.300
0.570
0.850
1.00
Note 8
0.550
1.10
1.70
2.00
Note 8
0.420
0.740
1.20
1.40
Note 8
0.680
1.40
1.70
2.30
Note 8
0.940
1.90
2.40
2.90
Note 8
1.20
2.70
3.80
4.60
Irms7
(A)
0.74
0.74
0.74
0.74
0.74
1.13
1.13
1.13
1.13
1.13
1.73
1.73
1.73
1.73
1.73
1.88
1.88
1.88
1.88
1.88
2.25
2.25
2.25
2.25
2.25
3.50
3.50
3.50
3.50
3.50
0.62
0.62
0.62
0.62
0.62
0.83
0.83
0.83
0.83
0.83
1.13
1.13
1.13
1.13
1.13
1.65
1.65
1.65
1.65
1.65
1.95
1.95
1.95
1.95
1.95
2.90
2.90
2.90
2.90
2.90
1. Please specify termination and packaging codes:
2.
3.
4.
5.
6.
7.
8.
9.
HPH1-1400LD
Termination: L = RoHS compliant tin-silver over tin
over nickel over phos bronze.
Special order:
T = RoHS tin-silver-copper
(95.5/4/0.5) or
S = non-RoHS tin-lead (63/37).
Packaging: All but HP6 and HPH6:
D = 13″ machine-ready reel. EIA-481
embossed plastic tape
B = Less than full reel. In tape, but
not machine ready. To have a
leader and trailer added
($25 charge), use code letter D
instead.
HP6 and HPH6: 24 per tray (no code)
Inductance is per winding, measured at 100 kHz,
0.1 Vrms, 0 Adc.
DCR is per winding, measured on Cambridge
Technology micro-ohmmeter or equivalent.
Volt-time product is for a single winding or multiple
windings connected in parallel. To calculate volttime product for windings connected in series,
multiply the value specified in the table by the
number of windings connected in series.
Peak energy storage is for any combination of
windings, assuming saturation current applied. See
note 6 for definition of saturation current.
DC current at which the inductance drops 30% typ
from its value without current, based on current
applied to all six windings connected in series. For
applications where all windings are not connected in
series, use the following equation to calculate Isat:
Isat = Isattable × 6 ÷ number of windings in series.
Current that causes a 40°C rise from 25°C ambient
due to self heating, tested with continuous current
flow through all windings connected in series.
Application temperature rise will depend on the
operating current, duty cycle, and winding
connection.
Part is designed exclusively for use as a forward
converter transformer and was not tested for
energy storage and saturation current.
Electrical specifications at 25°C.
Core material Ferrite
Terminations RoHS tin-silver over tin over
nickel over phos bronze. Other terminations
available at additional cost.
Ambient temperature –40°C to +85°C with Irms
current, +85°C to +125°C with derated current
Storage temperature Component: –40°C to
+125°C. Packaging: –40°C to +80°C
Resistance to soldering heat Max three
40 second reflows at +260°C, parts cooled to
room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited
floor life at <30°C / 85% relative humidity)
Failures in Time (FIT) / Mean Time Between
Failures (MTBF)
38 per billion hours / 26,315,789 hours,
calculated per Telcordia SR-332
PCB washing Only pure water or alcohol
recommended
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-2
Revised 01/23/09
Document 613-3
Hexa-Path Magnetics
HP1, HPH1
Dot indicates pin 1
1
0.079
2,00
0.394
10,00
12
HP1-1234L
CCIXXXX
0.028
0,70
0.063
1,60
1
12
0.079
2,00
0.512 max
13,0
0.055
1,40
0.362
9,20
Recommended
Land Pattern
0.244max
6,20
0.433
11,00
0.512max
13,0
Dimensions are in
0.004 / 0,10
Weight: 1.4 g
Packaging 500 per 13″ reel Plastic tape: 24 mm wide,
0.5 mm thick, 20 mm pocket spacing, 6.6 mm pocket depth
inches
mm
HP2, HPH2
0.098
2,50
Dot indicates pin 1
1
0.098
2,50
12
HP2-1234L
CCIXXXX
0.028
0,70
0.098
2,50
0.512
13,00
1
12
Recommended
Land Pattern
0.642 max
16,30
0.069
1,75
0.508
12,90
0.291max
7,40
0.575
14,60
0.661max
16,80
Dimensions are in
inches
mm
0.004 / 0,10
Weight: 2.7 – 2.8 g
Packaging 400 per 13″ reel Plastic tape: 32 mm wide,
0.4 mm thick, 20 mm pocket spacing, 7.6 mm pocket depth
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-3
Revised 01/23/09
Document 613-4
Hexa-Path Magnetics
HP3, HPH3
Dot indicates pin 1
1
12
HP3-1234L
CCIXXXX
0.028
0,70
0.098
2,50
0.135
3,43
0.665
16,88
1
0.098
2,50
0.677 max
17,20
12
Recommended
Land Pattern
0.069
1,75
0.591
15,00
0.291max
7,40
0.004 / 0,10
0.693
17,60
0.865 max
22,00
Dimensions are in
Weight: 4.2 – 4.6 g
Packaging 200 per 13″ reel Plastic tape: 44 mm wide,
0.4 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth
inches
mm
HP4, HPH4
Dot indicates pin 1
0.130
3,30
1
0.100
2,54
12
HP4-1234L
CCIXXXX
0.028
0,70
0.100
2,54
0.748
19,0
1
12
Recommended
Land Pattern
0.685 max
17,40
0.069
1,75
0.699
17,00
0.382 max
9,70
0.799
20.30
0.950 max
24,13
Dimensions are in
inches
mm
0.004 / 0,10
Weight: 6.8 – 7.5 g
Packaging 200 per 13″ reel Plastic tape: 44 mm wide,
0.4 mm thick, 24 mm pocket spacing, 11.5 mm pocket depth
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-4
Revised 01/23/09
Document 613-5
Hexa-Path Magnetics
HP5, HPH5
Dot indicates pin 1
0.130
3,3
1
12
HP5-1234L
CCIXXXX
0.028
0,70
0.118
3,00
0.930
23,62
1
0.118
3,00
12
Recommended
Land Pattern
0.810 max
20,57
0.069
1,75
0.827
21,0
0.425 max
10,80
0.004 / 0,10
0.969
24,6
Weight: 10.6 – 11.5 g
Packaging 175 per 13″ reel Plastic tape: 44 mm wide,
0.4 mm thick, 28 mm pocket spacing, 12.0 mm pocket depth
1.148
max
29,15
Dimensions are in
inches
mm
HP6, HPH6
Dot indicates pin 1
0.108
2,75
1
1.10
28,2
12
1
12
0.039
1,00
HP6-1234L
CCIXXXX
0.148
3,75
0.148
3,75
Recommended
Land Pattern
1.053 max
26,75
0.079
2,00
1.024
26,0
0.535 max
13,6
1.173
29,80
1.285 max
32,65
Dimensions are in
0.004 / 0,10
Weight: 22.4 – 24.3 g
Packaging 24 per tray
inches
mm
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-5
Revised 01/23/09
Document 613-6
Hexa-Path Magnetics
Formulas used to calculate electrical characteristics
Connecting windings in series
Inductance = Inductancetable × (number of windings)2
DCR = DCRtable × number of windings
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable
Connecting windings in parallel
Inductance = Inductancetable
DCR = 1 ÷ [number of windings × (1 ÷ DCRtable)]
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable × number of windings
Inductors – using multiple windings
Part
number
HP3-0138L_
Inductance
(µH)
11.2 ±20%
DCR
max
(Ohms)
0.055
Volt-time Peak energy
product
storage
Isat
(V-µsec)
(µJ)
(A)
30.4
1.656 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 (Wn)
connected in series:
Inductance = Inductancetable × Wn2
= 11.2 × 42 = 179.2 µH
1
4
12
2
9
5
11
3
8
10
6
DCR = DCRtable × Wn
= 0.055 × 4 = 0.22 Ohms
7
Isat = (Isattable) × 6 ÷ Wn
= (0.65 × 6) ÷ 4 = 0.975 A
L = 179.2 µH
DCR = 0.22 ⏲
Isat = 0.975 A
Irms = 1.73 A
Irms = Irmstable = 1.73 A
Connecting windings in parallel
4
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
9
5
10
11
12
8
6
7
L = 11.2 µH
DCR = 0.015⏲
Isat = 3.9 A
Irms = 5.19 A
Irms = Irmstable × Wn
= 1.73 × 3 = 5.19 A
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
1
2
3
Document 613-6
Revised 01/23/09
Document 613-7
Hexa-Path Magnetics
Formulas used to calculate electrical characteristics
Connecting windings in series
Inductance = Inductancetable × (number of windings)2
DCR = DCRtable × number of windings
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable
Connecting windings in parallel
Inductance = Inductancetable
DCR = 1 ÷ [number of windings × (1 ÷ DCRtable)]
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable × number of windings
Create a 13 Watt 2 : 1 : 1 flyback transformer with a bias winding
Choose HPH3-0138L
Vin = 36 – 57 Vdc; Vout = 12 V, 1.1 A
Part
number
HPH3-0138L
Inductance
(µH)
23.6 ±20%
DCR
max
(Ohms)
0.125
Volt-time Peak energy
product
storage
Isat
(V-µsec)
(µJ)
(A)
43.9
1.457 0.420
Irms
(A)
1.13
Connecting primary windings in series
When primary windings (Wpri) are connected in series, inductance
increases, energy storage and Irms remain the same, but DCR increases
and Isat decreases.
1
4
12
2
9
Example: For HPH3-0138L, connect two primary windings in series:
Inductance = Inductancetable × Wpri2
= 23.6 × 22 = 94.4 µH
Pri
5
6
Sec
DCR = DCRtable × Wpri
= 0.125 × 2 = 0.25 Ohms
11
7
8
3
Isat = (Isattable × 6) ÷ Wpri
= (0.42 × 6) ÷ 2 = 1.26 A
Bias
10
Irms = Irmstable = 1.13 A
Connecting secondary windings in parallel
When secondary windings (Wsec) are connected in parallel, DCR decreases and Irms increases.
Primary:
L = 94.4 µH
DCR = 0.25⏲
Isat = 1.26 A
Irms = 1.13 A
Secondary:
DCR = 0.0625⏲
Irms = 2.26 A
Example: For HPH3-0083L, connect two secondary windings in
parallel:
DCR = 1 ÷ [Wsec × (1 ÷ DCRtable)]
= 1 ÷ [(2 × (1 ÷ 0.125)] = 0.0625 Ohms
Irms = Irmstable × Wsec = 1.13 × 2 = 2.26 A
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-7
Revised 01/23/09
Document 613-8
Hexa-Path Magnetics
Formulas used to calculate electrical characteristics
Connecting windings in series
Inductance = Inductancetable × (number of windings)2
DCR = DCRtable × number of windings
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable
Connecting windings in parallel
Inductance = Inductancetable
DCR = 1 ÷ [number of windings × (1 ÷ DCRtable)]
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable × number of windings
Create a 130 Watt, 1 : 1, two switch forward converter transformer
Choose HPH6-2400L
Vin = 36 – 57 Vdc; Vout = 12 V, 10.8 A
Part
number
HPH6-2400L
Inductance
(µH)
194 ±25%
DCR
max
(Ohms)
0.030
Volt-time Peak energy
product
storage
(V-µsec)
(µJ)
131.9
N/A
Isat
(A)
N/A
Irms
(A)
2.90
Connecting primary windings in parallel
When primary windings (Wpri) are connected in parallel, DCR decreases,
Irms increases, and inductance and volt-time product remain the same.
Example: For HPH6-2400L, connect three primary windings in parallel:
Inductance = Inductancetable
= 194 µH
DCR = 1 ÷ [Wpri × (1 ÷ DCRtable)]
= 1 ÷ [(3 × (1 ÷ 0.030]) = 0.010 Ohms
VT
= VTtable
= 131.9 V-µsec
1
2
3
4
5
6
Pri
Sec
10
11
12
7
8
9
Primary:
L = 194 µH
DCR = 0.01⏲
Irms = 8.7 A
VT = 131.9 V-µsec
Secondary:
DCR = 0.01⏲
Irms = 8.7 A
Irms = Irmstable × Wpri
= 2.90 × 3 = 8.70 A
Connecting secondary windings in parallel
When secondary windings (Wsec) are connected in parallel, DCR
decreases and Irms increases.
Example: For HPH6-2400L, connect three secondary windings in
parallel:
DCR = 1 ÷ [Wsec × (1 ÷ DCRtable)]
= 1 ÷ [(3 × (1 ÷ 0.030)] = 0.010 Ohms
Irms = Irmstable × Wsec
= 2.90 × 3 = 8.70 A
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-8
Revised 01/23/09
Document 613-9
Hexa-Path Magnetics
Formulas used to calculate electrical characteristics
Connecting windings in series
Inductance = Inductancetable × (number of windings)2
DCR = DCRtable × number of windings
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable
Connecting windings in parallel
Inductance = Inductancetable
DCR = 1 ÷ [number of windings × (1 ÷ DCRtable)]
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable × 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
max
(Ohms)
0.030
Volt-time Peak energy
product
storage
(V-µsec)
(µJ)
131.9
N/A
Isat
(A)
N/A
Irms
(A)
2.90
3
Connecting primary windings in parallel
When primary windings (Wpri) are connected in parallel, DCR decreases,
current ratings increase, and inductance and volt-time product remain
the same.
10
4
1
2
Example: For HPH-2400L, connect two primary windings in parallel:
Inductance = Inductancetable
= 194 µH
VT
9
5
Pri
DCR = 1 ÷ [Wpri × (1 ÷ DCRtable)]
= 1 ÷ [(2 × (1 ÷ 0.030)] = 0.015 Ohms
Sec A
11
12
8
6
Sec B
= VTtable
= 131.9 V-µsec
7
Irms = Irmstable × Wpri
= 2.90 × 2 = 5.8 A
Connecting secondary windings in series
When secondary windings (Wsec) are connected in series, Irms
remains the same, but DCR increases.
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
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 = DCRtable × Wsec
= 0.030 × 2 = 0.060 Ohms
Irms = Irmstable
= 2.9 A
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-9
Revised 01/23/09
Document 613-10
Hexa-Path Magnetics
Formulas used to calculate electrical characteristics
Connecting windings in series
Inductance = Inductancetable × (number of windings)2
DCR = DCRtable × number of windings
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable
Connecting windings in parallel
Inductance = Inductancetable
DCR = 1 ÷ [number of windings × (1 ÷ DCRtable)]
Isat = (Isattable × 6) ÷ number of windings connected in series
Irms = Irmstable × number of windings
Create a 1 : 1 gate drive transformer
Choose HP1-1400L
Part
number
HP1-1400L
Inductance
(µH)
89.6 ±25%
DCR
max
(Ohms)
0.130
Volt-time Peak energy
product
storage
(V-µsec)
(µJ)
23.4
N/A
Isat
(A)
N/A
Irms
(A)
0.74
Connecting primary windings in series
When primary windings (Wpri) are connected in series, inductance and
volt-time product increase, energy storage and Irms remain the same,
but DCR increases.
Example: For HPH1-1400L, connect three primary windings in series:
4
10
1
5
7
11
Pri
Sec
Inductance = Inductancetable × Wpri2
= 89.6 × 32 = 806.4 µH
2
6
8
12
DCR = DCRtable × Wpri
= 0.130 × 3 = 0.39 Ohms
3
9
VT
= VTtable × Wpri
= 70.2 V-µsec
Primary:
L = 806.4 µH
DCR = 0.39⏲
Irms = 0.74 A
VT = 70.2 V-µsec
Irms = Irmstable
= 0.74
Secondary:
DCR = 0.39⏲
Irms = 0.74 A
Connecting secondary windings in series
When secondary windings (Wsec) are connected in series, Irms
remains the same, but DCR increases.
Example: For HP1-1400L, connect three secondary windings in
series:
DCR = DCRtable × Wsec
= 0.130 × 3 = 0.39 Ohms
Irms = Irmstable
= 0.74
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Document 613-10
Revised 01/23/09
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