Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

FSP3122K33AE Datasheet(PDF) 4 Page - FOSLINK SEMICONDUCTOR CO.,LTD

Part # FSP3122K33AE
Description  150KHZ 3A PWM BUCK DC/DC CONVERTER
Download  11 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  FOSLINK [FOSLINK SEMICONDUCTOR CO.,LTD]
Direct Link  
Logo FOSLINK - FOSLINK SEMICONDUCTOR CO.,LTD

FSP3122K33AE Datasheet(HTML) 4 Page - FOSLINK SEMICONDUCTOR CO.,LTD

  FSP3122K33AE Datasheet HTML 1Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 2Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 3Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 4Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 5Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 6Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 7Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 8Page - FOSLINK SEMICONDUCTOR CO.,LTD FSP3122K33AE Datasheet HTML 9Page - FOSLINK SEMICONDUCTOR CO.,LTD Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 11 page
background image
150KHZ 3A PWM BUCK DC/DC CONVERTER
2007-6-12
4/11
FSP3123
FUNCTION DESCRIPTION
Pin Function
VIN
This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be present at
this pin to minimize voltage transients and to supply the switching currents needed by the regulator.
Ground
Circuit ground.
Output
Internal switch. The voltage at this pin switches between (VIN – VSAT) and approximately – 0.5V, with a duty cycle
of approximately VOUT / VIN. To minimize coupling to sensitive circuitry, the PC board copper area connected to
this pin should be kept a minimum.
Feedback
Senses the regulated output voltage to complete the feedback loop.
ON/OFF
Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply
current to approximately 150uA. Pulling this pin below a threshold voltage of approximately 1.3V turns the
regulator on, and pulling this pin above 1.3V (up to a maximum of 18V) shuts the regulator down. If this shutdown
feature is not needed, the ON/OFF pin can be wired to the ground pin.
Thermal Considerations
The FSP3123 is available in three packages, a 5-pin TO-220, 5-pin TO263 and a 8-pin PDIP Package. The
TO-220 package needs a heat sink under most conditions. The size of the heat sink depends on the input voltage,
the output voltage, the load current and the ambient temperature. The FSP3123 junction temperature rises above
ambient temperature for a 3A load and different input and output voltages. The data for these curves was taken
with the FSP3123 (TO-220 package) operating as a buck switching regulator in an ambient temperature of 25
oC
(still air). These temperature rise numbers are all approximate and there are many factors that can affect these
temperatures. Higher ambient temperatures require more heat sinking.
The TO-263 surface mount package tab is designed to be soldered to the copper on a printed circuit board. The
copper and the board are the heat sink for this package and the other heat producing components, such as the
catch diode and inductor. The PC board copper area that the package is soldered to should be at least 0.4 in
2,
and ideally should have 2 or more square inches of 2 oz. Additional copper area improves the thermal
characteristics, but with copper areas greater than approximately 6 in
2, only small improvements in heat
dissipation are realized. If further thermal improvements are needed, double sided, multilayer PC board with large
copper areas and/or airflow are recommended.
The FSP3123 (TO-263 package) junction temperature rise above ambient temperature with a 3A load for
various input and output voltages. This data was taken with the circuit operating as a buck switching regulator
with all components mounted on a PC board to simulate the junction temperature under actual operating
conditions. This curve can be used for a quick check for the approximate junction temperature for various
conditions, but be aware that there are many factors that can affect the junction temperature. When load
currents higher than 2A are used, double sided or multilayer PC boards with large copper areas and/or airflow
might be needed, especially for high ambient temperatures and high output voltages.
For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper
should be used in the board layout. (Once exception to this is the output (switch) pin, which should not have
large areas of copper.) Large areas of copper provide the best transfer of heat (lower thermal resistance) to the
surrounding air, and moving air lowers the thermal resistance even further.
Package thermal resistance and junction temperature rise numbers are all approximate, and there are many
factors that will affect these numbers. Some of these factors include board size, shape, thickness, position,
location, and even board temperature. Other factors are, trace width, total printed circuit copper area, copper
thickness, single or double-sided, multilayer board and the amount of solder on the board. The effectiveness of
the PC board to dissipate heat also depends on the size, quantity and spacing of other components on the board,
as well as whether the surrounding air is still or moving. Furthermore, some of these components such as the
catch diode will add heat to the PC board and the heat can vary as the input voltage changes. For the inductor,
depending on the physical size, type of core material and the DC resistance, it could either act as a heat sink
taking heat away from the board, or it could add heat to the board.


Similar Part No. - FSP3122K33AE

ManufacturerPart #DatasheetDescription
logo
FOSLINK SEMICONDUCTOR C...
FSP3122K33AE FOSLINK-FSP3122K33AE Datasheet
230Kb / 10P
   150KHZ 3A PWM BUCK DC/DC CONVERTER
More results

Similar Description - FSP3122K33AE

ManufacturerPart #DatasheetDescription
logo
Diodes Incorporated
AP1507 DIODES-AP1507 Datasheet
200Kb / 10P
   150KHz, 3A PWM BUCK DC/DC CONVERTER
AP1507 Rev. 1
AP1501-50K5G-13 DIODES-AP1501-50K5G-13 Datasheet
190Kb / 12P
   150KHz, 3A PWM BUCK DC/DC CONVERTER
AP1501 DIODES-AP1501_09 Datasheet
190Kb / 12P
   150KHz, 3A PWM BUCK DC/DC CONVERTER
AP1501 Rev. 11
logo
Advanced Power Electron...
APE1702 A-POWER-APE1702_08 Datasheet
471Kb / 10P
   150KHz, 3A PWM BUCK DC/DC CONVERTER
logo
Anachip Corp
AP1501 ANACHIP-AP1501_1 Datasheet
217Kb / 12P
   150Khz, 3A PWM Buck DC/DC Converter
AP1507 ANACHIP-AP1507 Datasheet
169Kb / 9P
   150KHz, 3A PWM Buck DC/DC Converter
logo
First Silicon Co., Ltd
FAC1507 FS-FAC1507 Datasheet
916Kb / 15P
   3A 150KHZ PWM Buck DC/DC Converter
logo
TECHCODE SEMICONDUCTOR,...
TD1501 TECHCODE-TD1501 Datasheet
1Mb / 18P
   3A 150KHz PWM Buck DC/DC Converter
December, 20, 2005.
logo
E-CMOS Corporation
EC9301A E-CMOS-EC9301A Datasheet
1Mb / 16P
   3A 150KHz PWM Buck DC/DC Converter
logo
Orister Corporation
RS2596 ORISTER-RS2596_09 Datasheet
756Kb / 9P
   150KHz, 3A PWM Buck DC/DC Converter
logo
FOSLINK SEMICONDUCTOR C...
FSP3122 FOSLINK-FSP3122 Datasheet
230Kb / 10P
   150KHZ 3A PWM BUCK DC/DC CONVERTER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com