SMT FLYBACK TRANSFORMERS
For National’s 100kHz Simple Switcher™
Designed for use with National’s device
numbers LM2585/86 and LM2587/88
Performance verified by National Semiconductor
Electrical Specifications @ 25°C — Operating Temperature -40°C to 130°C
DCR
DCR
DCR
DCR
Part
Number
L
P
I
IN
V
IN
(VDC
V
OUT
(VDC
1
)
V
OUT
(VDC
2
)
V
OUT
(VDC)
3
Turns
Ratio
IOUT
IOUT
3
Primary
Sec 1
Sec 2
Sec 3
IOUT
1
2
(µH NOM) peak
)
(
Ω
MAX)
(
Ω
MAX)
(
Ω
MAX)
(
Ω
MAX)
4-6
4-6
8-16
4-6
18-36
18-36
18-36
18-36
3.3
5
12
12
5
12
12
5
—
—
—
-12
12
-12
-12
12
—
—
—
—
-12
—
1.8
1.4
1.2
0.3
1.8
0.63
1
2.5
—
—
—
—
—
—
—
0.25
—
PE-68411
22
4.85
1:1
0.04
0.04
—
—
PE-68412
PE-68413
PE-68414
PE-68421
PE-68422
22
66
65
85
85
5.00
2.99
2.98
4.90
4.92
0.3
1:2.5:2.5
1:0.5:1.15:1.15
1:1.2:1.2
1:0.8:0.8
1:0.35:0.8:0.8
0.04
0.03
0.055
0.12
0.14
0.5
0.04
0.25
0.22
0.025
0.5
—
0.80
—
—
0.25
0.25
0.63
1
0.80
0.25
0.22
0.25
—
-12
—
0.5
0.5
NOTE: Simple Switcher™ is a trademark of National Semiconductor Corporation.
Mechanicals
Schematics
.970
MAX
24,64
PE-68421
PE-68422
.800
20,32
PE-68411
PE-68412
PE-68413
PE-68414
.200 .010
5,08 0,25
8X
PE-68411
PE-68413
PE-68412
PE-68414
PE-684XX
PAT PEND
10
6
8
1
7
SEC 1
1
SEC 1
9
DATE CODE
COUNTRY OF ORIGIN
10
8
16
1.070
27,18
MAX
16
SEC 2
9
.900 .010
22,86 0,25
DATE CODE
COUNTRY OF ORIGIN
.470
11,94
MAX
8
1
16
2
8
9
7
SEC 1
1
SEC 1
SEC 2
5
1
9
7
.005/0,13
16 SURFACES
.060
1,52
16
SEC 2
10
1.040
MAX
.700
17,78
MAX
26,42
10
15
.900 .010
22,86 0,25
.100
2,54
6
14X
8
9
SEC 3
11
.680
17,27
.920
MAX
23,37
PE-68421
PE-68422
.700
17,78
1
10
2
1
10
2
4
3
SEC 1
SEC 2
SEC 1
7
5
6
8
4
7
5
6
.095
10X
16
2,41
1
.900
22,86
SEC 2
SEC 3
.800
20,32
9
9
.200
5,08
R
.055
1,40
R
.700
17,78
.900
22,86
.070
1,78
16X
Inches
Dimensions:
Unless otherwise specified, all tolerances are
mm
.100
16X
.185
4,70
.010
0,25
2,54
.110
2,79
For More Information :
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Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product
names mentioned herein may be trademarks or registered trademarks of their respective owners.
Printed on recycled paper. ©2003, Pulse Engineering, Inc.
P598.A (5/03)