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SD14-6R9-R Datasheet(PDF) 2 Page - Cooper Bussmann, Inc. |
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SD14-6R9-R Datasheet(HTML) 2 Page - Cooper Bussmann, Inc. |
2 / 4 page Inductor Selection: Buck Converters FFiigguurree 2 2 A Apppplliiccaattiioonn P Paarraam meetteerrss:: • Switching frequency= 250kHz • Input voltage range= 12V±10% • Max ripple current = 220mA • Output Voltage= 5.0V S Stteepp 1 1.. C Caallccuullaattee tthhee D Duuttyy C Cyyccllee •Vo = output voltage •Vi = Max input voltage •D = Vo / Vi • D = 5/13.2 = 0.379 S Stteepp 2 2.. C Caallccuullaattee tthhee V Voollttaaggee A Accrroossss tthhee IInndduuccttaannccee •V1 = Vi-Vo (Switch on) •V1 = 13.2 - 5 = 8.2V •V1 = -Vo (Switch off) •V1 = - Vo = - 5V S Stteepp 3 3.. C Caallccuullaattee tthhee R Reeqquuiirreedd IInndduuccttaannccee •L = Vl.dt/di • L = (8.2 x 0.379/250 x 10 3)/0.22 • L = 56 μH Inductor Selection: Boost Converters FFiigguurree 3 3 A Apppplliiccaattiioonn P Paarraam meetteerrss:: • Switching frequency= 100kHz • Input voltage range= 4.5-5.5V • Max ripple current = 100mA • Output Voltage= 12.0V S Stteepp 1 1.. C Caallccuullaattee tthhee D Duuttyy C Cyyccllee:: •Vo= output voltage •Vi = Max input voltage • D = 1 - (Vi / Vo) • D = 1 – (5.5/12.0) = 0.542 S Stteepp 2 2.. C Caallccuullaattiinngg tthhee vvoollttaaggee aaccrroossss tthhee iinndduuccttaannccee •V1 = Vi (Switch on) •V1 = 5.5V •V1 = Vo – Vi (Switch off) •V1 = 12 – 5.5 = 6.5V S Stteepp 3 3.. C Caallccuullaattiinngg tthhee rreeqquuiirreedd iinndduuccttaannccee •L = Vl.dt/di • L= (5.5 x 0.542/100 x 10 3)/0.1 • L= 298 μH 5V Output Voltage Output Cap Buck Inductor Freewheeling Diode Switch 12V Input Voltage Figure 2: Buck Inductor Example 12V Output Voltage Output Cap 5V Input Voltage Figure 3: Boost Inductor Example Switch Diode Boost Inductor Typical Applications Using Inductors for Switching Regulators Media Players Backlight Displays Laptop Computers Industrial Test Equipment Digital Cameras Mobile Phones |
Similar Part No. - SD14-6R9-R |
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Similar Description - SD14-6R9-R |
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