LM2623 Evaluation Board National Semiconductor Application Note 1

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LM2623 Evaluation Board National Semiconductor Application Note 1

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LM2623 Evaluation Board
LM2623 Evaluation Board
National Semiconductor Application Note 1274 July 2003
LM2623 general purpose, gated oscillator based, DC/DC boost converter that from input voltage produce regulated output voltage with ripple. LM2623 evaluation board programmed output running two-cell power supply. LM2623 capable
supplying 600mA current with input voltage 2.3V. more information regarding LM2623, please refer data sheet, Application Note AN-1258, well cookbook (AN-1221) more application configurations. bill material schematic follow:
TABLE Bill Materials Designator Description LM2623 DC-DC Converter MSOP-8 Inductor (4.7µH Manufacturer National Semiconductor Coilcraft Model Number LM2623 DO1813P-472HC 595D227X06R3C2 293D107X96R3C2T MBRS340T3 CRCW06031003F CRCW06033003F CRCW06031503F C1608C0G1H4R7C
Input Capacitor (220µF tantalum Vishay Sprague capacitor Output Capacitor (100µF tantalum capacitor (10%, 10V)) Output Diode (40V Schottky) Feedback Resistor Feedback Resistor Frequency Resistor 4.7pF Ceramic Capacitor Vishay Sprague OnSemi Vishay Dale Vishay Dale Vishay Dale
20065204
Cell Converter
AN-1274
2003 National Semiconductor Corporation
AN200652
www.national.com
AN-1274
20065201
Application Board Circuit Diagram
Within Application Board Circuit Diagram there many components shown that populated output evaluation board. These component footprints used
numerous other applications found application note AN1221. addition, jumpers closed two-cell input output application board.
20065202
Typical Layout, View
www.national.com
LM2623 Evaluation Board
20065203
Bottom View Unmirrored
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT GENERAL COUNSEL NATIONAL SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user.
National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: 180-530 Email: europe.support@nsc.com Deutsch Tel: 9508 6208 English Tel: 2171 Tel: 8790
critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com
National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560
AN-1274
National does assume responsibility circuitry described, circuit patent licenses implied National reserves right time without notice change said circuitry specifications.

LM2623 Evaluation Board National Semiconductor Application Note 1

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