Nordtek

 

SW - Inductors for 50KHz Simple Switcher

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Compatible with National Semiconductor´s Simple Switcher TM Part Numbers LM2574, LM2475 and LM2576    
   

Features

  • High energy storage with minimum saturation
  • High stability from no load to full load
  • Available in both SMD and TH versions
  • Manufactured in ISO-9001 approved facility
  • Operating temperature range: -40°C to +125°
 


Mechanical Layout
Cross Reference

Electrical Specifications at 25°C

Part Number Rated Current (IDC) LN (µH)
Typical *
LO (µH) ±20% No DC Load ETOP (V-µSec) Max. DCR (Ohms) Max. Package
"C" "S" "T" "B" "F" "V"
 SW_-3.0-47 3,0 47 38 90 0,05 2 5 5      
 SWC-3.0-68 3,0 68 55 90 0,02 4          
 SWC-3.0-100 3,0 100 91 90 0,04 4          
 SW_-2.0-150 2,0 150 130 90 0,10 4 6        
 SW_-1.4-220
 SW_-1.4-220
1,4
1,4
220
220
230
176
90
90
0,38
0,14

3
5
6
5
  2
2
 SW_-0.9-330
 SW_-0.9-330
0,9
0,9
330
330
302
267
90
90
0,74
0,18

3
5
6
5
  2
2
 SWC-0.64-470 0,64 470 426 90 0,16 4          
 SW_-0.85-680 0,85 680 657 90 1,25   5 5   2
 
 SWC-3.0-150 3,0 150 136 200 0,10 4          
 SWC-3.0-220 3,0 220 167 200 0,07 5          
 SWC-3.0-330 3,0 330 292 200 0,15 5          
 SWC-2.0-470 2,0 470 369 200 0,17 5          
 SWC-1.3-680 1,3 680 562 200 0,20 5          
 SWC-0.95-1000 0,95 1.000 762 200 0,24 5          
 SWB-0.62-1500 0.62 1.500 1.150 200 1,00       8    
 SWB-0.42-2200 0,42 2.200 1.730 200 1,80       8    

Notes:
1) Inductance will be typical for the IDC and ETOP values listed above

2) No load Inductance measured at BOP maximum of 10 gauss (10mV @ 20kHz)

3) Simple Switcher TM is a trademark of National Semiconductor Corporation
 




Mechanical Layout

Mechanical Layout


Mounting Style Size Code
Dimensions - Inches (mm)
A B C D E
"S"
SMD
S5 0.669
(17.0)
0.701
(17.8)
0.425
(10.8)
0.591
(15.0)
0.591
(15.0)
S6 0.925
(23.5)
0.925
(23.5)
0.531
(13.5)
0.827
(21.0)
0.689
(17.5)
 
Mounting Style Size Code
Dimensions - Inches (mm)
C D E X=Coil
O.D. +
"C"
Vertical
Clip
Mount
C2 0.650
(16.5)
0.449
(11.4)
0.299
(7.60)
0.110
(2.80)
C3 0.827
(21.0)
0.449
(11.4)
0.299
(7.60)
0.110
(2.80)
C4 0.949
(24.1)
0.598
(15.2)
0.449
(11.4)
0.110
(2.80)
C5 1.252
(31.8)
0.701
(17.8)
0.500
(12.7)
0.130
(3.30)




SW Series Cross Reference for National´s 50kHz Simple SwitcherTM Pulse Eng. - Talema

Pulse Engineering
Part Number
Talema Part Number *
Vertical
Clip Mount
Flat Open
SMD
Flat Open
TH
Vertical TH
Base Mount
Flat TH
Encapsulated
Vertical TH
Encapsulated
 PE-53112
 PE-92114K
 SWC-3.0-47
 SWC-3.0-68
 SWS-3.0-47

 SWT-3.0-47

     
 PE-92108K
 PE-53113
 SWC-3.0-100
 SWC-2.0-150
 SWS-2.0-150
       
 PE-52626
 PE-53145

 SWC-1.4-220
 SWS-1.4-220
 SWS6-1.4-220
 SWT-1.4-220

   SWF-1.4-220

 SWV -1.4-220

 PE-52627
 PE-53146
 
 SWC-0.90-330
 SWS-0.90-330
 SWS6-0.90-330
 SWT-0.90-330

   SWF-0.90-330

 SWV-0.90-330

 PE-53114
 PE-52629
 SWC-0.64-470


 SWS-0.85-680

 SWT-0.85-680
 
 SWF-0.85-680

 SWV-0.85-680
 PE-53115
 PE-53116
 SWC-3.0-150
 SWC-3.0-220
         
 PE-53117
 PE-53118
 SWC-3.0-330
 SWC-2.0-470
         
 PE-53119
 PE-53120
 SWC-1.3-680
 SWC-0.95-1000
         
 PE-53121
 PE-53122
       SWB-0.62-1500
 SWB-0.42-2200
   


**Note: There are no equivalent Pulse SMD types for Talema PIN SWT-3.0-47 and the SWS style SMD package.