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Summary of Contents for Texas Instruments LM3248
- Page 1 Using the LM3248 Evaluation Module User's Guide Literature Number: SNAA196 September 2013 All trademarks are the property of their respective owners.
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Page 2: Operating Conditions
Evaluation Module Introduction The LM3248 evaluation module is a working demonstration of a PWM/PFM Boost-Buck DC/DC converter designed to provide efficient utilization of battery power for 2G/3G/4G and 3GPP/LTE RF subsystems. The LM3248 incorporates a step-up (Boost) and a variable output step-down (Buck) DC-DC converter. - Page 3 CAP, CERM, 2.2µF, 6.3V MuRata Digi-Key Mouser ±20%, X5R, 0402 CAP, CERM, 4.7µF, 10V MuRata Digi-Key ±20%, X5R, 0402 SNAA196 – September 2013 LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
- Page 4 (Not installed) 3.5A Ferrite FB1, FB2 Bead, 60Ω @ 100MHz, MPZ1608S600A Digi-Key Mouser LM3248 Evaluation Module Photo Figure 1. LM3248 Evaluation Board LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module SNAA196 – September 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
- Page 5 “VCON_S.” The pins with silkscreened dots indicate the active signal pins. 1. LM3248 EVM Jumper Settings • The LBST, L BUCK & ACB 0.1” center slide-on jumpers located on the back side of the LM3248 Evaluation Board must be installed for proper operation. See Figure 8 for locations on back side of EVM.
- Page 6 • LBST - Boost inductor jumper • L BUCK - Buck inductor jumper • ACB - ACB jumper LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module SNAA196 – September 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
- Page 7 LM3248 Evaluation Board Layout Figure 2. Top Layer Figure 3. Bottom Layer Figure 4. Mid Layer 1 Figure 5. Mid Layer 2 SNAA196 – September 2013 LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
- Page 8 Figure 6. Mid-Layer 3 Figure 7. Mid Layer 4 0.1 inch jumpers are installed here Figure 8. Bottom Layer (Mirrored) LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module SNAA196 – September 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
- Page 9 LM3248 Evaluation Board Layout www.ti.com Figure 9. Stackup SNAA196 – September 2013 LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
- Page 10 0201 VCON PGND M ODE ENABLE VCON_S 0201 ATB2 ATB1 ATB2 ATB1 ENABLE ATB0 M ODE ATB2 ATB1 5103309-5 LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module SNAA196 – September 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
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Page 11: Connection Diagram
VDD2_ ATB2 ATB2 PGND PGND BUCK BUCK Figure 10. Top View (Bumps Down) Figure 11. Bottom View (Bumps Up) SNAA196 – September 2013 LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated... -
Page 12: Pin Descriptions
PVIN_BUCK when used with Boost. Active Current Assist and Bypass output. Connected to the Buck converter output filter capacitor. LM3248 2.7MHz, 2.5A Boost-Buck DC/DC Converter Evaluation Module SNAA196 – September 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated... - Page 13 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions.
- Page 14 FCC Interference Statement for Class B EVM devices NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
- Page 15 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page SPACER EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
- Page 16 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2015, Texas Instruments Incorporated...
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Page 17: Important Notice
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.
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