LM2622 Step-Up DC/DC Converter Evaluation Board LM2622 step-up co

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LM2622 Step-Up DC/DC Converter Evaluation Board LM2622 step-up co

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LM2622 Step-Up DC/DC Converter Evaluation Board
LM2622 Step-Up DC/DC Converter Evaluation Board
LM2622 step-up converter with adjustable switching frequency power shutdown feature. evaluation board designed boosting I-cell Li-Ion battery input volatge regulated output board includes jumpers: selects whether part running shutdown mode, other selects switching frequency
National Semiconductor Application Note 1198 Clinton Jensen April 2007
either MHz. component values board designed operation, will work well 1.3MHz. Smaller component values generally used part operated higher frequency. bill materials schematic follows:
TABLE Bill Materials Designator CIN2 COUT1 RFB1 RFB2 Description Step-Up Regulator Inductor (1.2A average rating) Output Capacitor (10µF, rating) Output Diode 20.5 Feedback Resistor 6.98 Feedback Resistor Compensation Resistor Compensation Resistor used higher voltage capacitors used. larger inductor also required input current expected exceed 1.2A, output short circuit conditions anticipated. Manufacturer National Semiconductor Sumida Taiyo-Yuden International Rectifier Model Number LM2622 CDRH5D18-100NC LMK432BJ226K EMK325BJ106K 15MQ040N
Input Capacitor (22µF, rating) Taiyo-Yuden
Because capacitor ratings, input board should always less output should higher than 16V. Higher voltages limits)
20021801
FIGURE
AN-1198
2007 National Semiconductor Corporation
200218
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LM2622 Step-Up DC/DC Converter Evaluation Board
Notes
CONTENTS THIS DOCUMENT PROVIDED CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION ("NATIONAL") PRODUCTS. NATIONAL MAKES REPRESENTATIONS WARRANTIES WITH RESPECT ACCURACY COMPLETENESS CONTENTS THIS PUBLICATION RESERVES RIGHT MAKE CHANGES SPECIFICATIONS PRODUCT DESCRIPTIONS TIME WITHOUT NOTICE. LICENSE, WHETHER EXPRESS, IMPLIED, ARISING ESTOPPEL OTHERWISE, INTELLECTUAL PROPERTY RIGHTS GRANTED THIS DOCUMENT. TESTING OTHER QUALITY CONTROLS USED EXTENT NATIONAL DEEMS NECESSARY SUPPORT NATIONAL'S PRODUCT WARRANTY. EXCEPT WHERE MANDATED GOVERNMENT REQUIREMENTS, TESTING PARAMETERS EACH PRODUCT NECESSARILY PERFORMED. NATIONAL ASSUMES LIABILITY APPLICATIONS ASSISTANCE BUYER PRODUCT DESIGN. BUYERS RESPONSIBLE THEIR PRODUCTS APPLICATIONS USING NATIONAL COMPONENTS. PRIOR USING DISTRIBUTING PRODUCTS THAT INCLUDE NATIONAL COMPONENTS, BUYERS SHOULD PROVIDE ADEQUATE DESIGN, TESTING OPERATING SAFEGUARDS. EXCEPT PROVIDED NATIONAL'S TERMS CONDITIONS SALE SUCH PRODUCTS, NATIONAL ASSUMES LIABILITY WHATSOEVER, NATIONAL DISCLAIMS EXPRESS IMPLIED WARRANTY RELATING SALE AND/OR NATIONAL PRODUCTS INCLUDING LIABILITY WARRANTIES RELATING FITNESS PARTICULAR PURPOSE, MERCHANTABILITY, INFRINGEMENT PATENT, COPYRIGHT OTHER INTELLECTUAL PROPERTY RIGHT. LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS PRIOR WRITTEN APPROVAL CHIEF EXECUTIVE OFFICER GENERAL COUNSEL NATIONAL SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices 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. critical component component life support device system whose failure perform reasonably expected cause failure life support device system affect safety effectiveness. National Semiconductor National Semiconductor logo registered trademarks National Semiconductor Corporation. other brand product names trademarks registered trademarks their respective holders.
Copyright© 2007 National Semiconductor Corporation
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AN-1198
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LM2622 Step-Up DC/DC Converter Evaluation Board LM2622 step-up co

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