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Summary of Contents for Texas Instruments LP8862-Q1EVM
- Page 1 Using the LP8862-Q1EVM Evaluation Module User's Guide Literature Number: SNVU478A July 2015 – Revised October 2015...
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Page 2: Table Of Contents
......................Fault Indicator ....................Evaluation Board Schematic ........................Bill of Materials ....................... Appendix A LED Load Board .......................... Revision History Table of Contents SNVU478A – July 2015 – Revised October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... - Page 3 LED Load Board - Schematic Diagram ................. Forward Voltage for Cree Xlamp ML-B LEDs List of Tables ..................Bill of Materials for LED Load Board SNVU478A – July 2015 – Revised October 2015 List of Figures Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...
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Page 4: Read This First
The Texas Instruments LP8862-Q1EVM evaluation module (EVM) helps designers to evaluate the operation and performance of the LP8862-Q1 device. The LP8862-Q1EVM uses the LP8862-Q1 to drive up to 2 LED strings for LCD backlighting with high efficiency. Information about output voltage and current ratings of the LP8862-Q1 can also be found in the device data sheet (SNVSA75). -
Page 5: Description Of The Lp8862-Q1
– Open and Shorted LED Fault Detection – Thermal Shutdown • Minimum Number of External Components Applications • Automotive Infotainment, Instrument Cluster and Backlighting Systems SNVU478A – July 2015 – Revised October 2015 LP8862-Q1EVM Evaluation Module Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 6: Hardware Setup
POINTS CONNECTOR INPUT VOLTAGE OUTPUT CONFIGURATION CONTROL POINTS SHUNTS FAULT LED CONTROL POINTS Figure 1. Evaluation Board Connectors and Setup LP8862-Q1EVM Evaluation Module SNVU478A – July 2015 – Revised October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 7: Board Layout
Figure 4. Evaluation Board Stackup • 4-layer board FR4 • Material thickness 1.616 ± 10% mm • Surface finish immersion gold SNVU478A – July 2015 – Revised October 2015 LP8862-Q1EVM Evaluation Module Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 8: Start-Up Of The Evm And Power Sequences
The backlight is shut down (LEDs turned off) by setting PWM input low or when VDDIO/EN = 0. If VDDIO/EN is set low, the LP8862-Q1 enters low-power mode with internal LDO disabled. LP8862-Q1EVM Evaluation Module SNVU478A – July 2015 – Revised October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 9: Boost Converter
Frequency should be higher than the switching frequency set by R resistor and be in range FSET 1.2...1.5 × ƒ SW SET SNVU478A – July 2015 – Revised October 2015 LP8862-Q1EVM Evaluation Module Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 10: Voltage Control
• = 1.2 V • – current setting resistor (R4), kΩ ISET • – output current per output, mA LP8862-Q1EVM Evaluation Module SNVU478A – July 2015 – Revised October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 11: Brightness Control
An open-drain FAULT pin indicates faults. The FAULT pin can be connected to LED D2 for indication (jumper J10). SNVU478A – July 2015 – Revised October 2015 LP8862-Q1EVM Evaluation Module Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 12: Evaluation Board Schematic
Evaluation Board Schematic www.ti.com Evaluation Board Schematic Figure 9. Evaluation Board Schematic LP8862-Q1EVM Evaluation Module SNVU478A – July 2015 – Revised October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 13: Bill Of Materials
Bill of Materials www.ti.com Bill of Materials The following is the bill of materials for the LP8862-Q1EVM: DESIGNATOR DESCRIPTION MANUFACTURER PART NUMBER C1, C4, C6, C7 CAP, CERM, 10uF, 50V, +/-10%, X5R, CGA5L3X5R1H106K160AB 1206_190 C2, C8 CAP, AL, 33uF, 50V, +/-20%, 40 mohm,... -
Page 14: Appendix A Led Load Board
NOTE: The LED board is not included with the EVM -- contact your local TI sales representative if board is needed. Figure 10. LED Load Board - Top Side Figure 11. LED Load Board - Bottom View LED Load Board SNVU478A – July 2015 – Revised October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... - Page 15 D100 D120 J105 J126 J106 J127 10.0 10.0 10.0 10.0 10.0 10.0 Figure 12. LED Load Board - Schematic Diagram SNVU478A – July 2015 – Revised October 2015 LED Load Board Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...
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Page 16: Bill Of Materials For Led Load Board
Samtec TSW-107-07-G-S D1...D120 Cool White SMD LED XLamp mL-B Cree MLBAWT-A1-0000-000W51 Figure 13. Forward Voltage for Cree Xlamp ML-B LEDs LED Load Board SNVU478A – July 2015 – Revised October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... -
Page 17: Revision History
Changed Product Preview to Production Data status NOTE: Page numbers for previous revisions may differ from page numbers in the current version. SNVU478A – July 2015 – Revised October 2015 Revision History Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated... - Page 18 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 19 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 20 【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 21 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...
- Page 22 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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