TPS63030EVM-658

User's Guide SLVU391A – August 2010 – Revised July 2019 TPS63030EVM-658 User's Guide This user’s guide describes the characteristics, operation, and use of the TPS63030EVM-658 evaluation module (EVM). This EVM contains the Texas Instruments TPS63030 buck-boost converter, configured with external components to regulate current through a WLED. This user’s guide includes EVM specifications, recommended test setup, test results, bill of materials, and a schematic diagram. 1 2 3 4 5 6 Contents Introduction ................................................................................................................... 1.1 Performance Specification Summary ............................................................................ 1.2 Modifications......................................................................................................... TPS63030EVM-658 Setup ................................................................................................. 2.1 Input/Output Connections .......................................................................................... Test Results .................................................................................................................. Design Procedure for Divider Network .................................................................................... Board Layout ................................................................................................................. Schematic and Bill of Materials ............................................................................................ 6.1 TPS63030EVM-658 Schematic ................................................................................... 6.2 TPS63030EVM-658 Bill of Materials ............................................................................. 2 2 2 2 2 3 3 4 6 6 7 List of Figures 1 2 3 4 ................................................................................................. Assembly Layer Including Silk Screen .................................................................................... Top Copper Layer ........................................................................................................... Bottom Copper Layer........................................................................................................ Efficiency vs Input Voltage 3 4 5 5 List of Tables 1 Typical Performance Specification Summary ............................................................................ 2 2 Bill of Materials ............................................................................................................... 7 SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback TPS63030EVM-658 User's Guide Copyright © 2010–2019, Texas Instruments Incorporated 1 Introduction 1 www.ti.com Introduction The Texas Instruments TPS63030EVM-658 evaluation module contains a TPS63030 buck-boost converter integrated circuit (IC), supporting components, and one white light-emitting diode (WLED). The purpose of this EVM is to facilitate evaluation of the TPS63030 in a typical WLED application. 1.1 Performance Specification Summary Table 1. Typical Performance Specification Summary Parameter Min VIN 1.8 VOUT Typ Max Units 5.5 V 375 mA 3.2 IWLED 325 Overvoltage Protection Clamp Voltage 350 V 6 V Table 1 provides a summary of the TPS63030EVM-658 performance specifications. All specifications are given for an ambient temperature of 25°C. 1.2 Modifications To aid user customization of the EVM, the board was designed with devices having 0603 or larger footprints. Actual implementations may occupy less space. Resistor R6 may be removed to measure current through the LED. 2 TPS63030EVM-658 Setup 2.1 Input/Output Connections The connection points and jumper positions are described in the following paragraphs. 2.1.1 J1 – VIN This header is the positive connection for the input power supply. Twist the leads to the input supply and keep them as short as possible. The input voltage must remain within the limits specified in Table 1. 2.1.2 J2 – Sense + and This header is low current sense lines that monitor Vin at the input capacitor. 2.1.3 J3 – GND This header is the return connection to the input power supply. 2.1.4 J4 – LED Out This header is voltage out of the converter to the LED 2.1.5 JP1 – Enable This jumper connects the enable pin of the TPS63030 to either ON (enabling the TPS63030) or OFF (disabling the TPS63030). The jumper must be installed in one position only. Do not leave JP1 open. WARNING This EVM WLED shines brightly. Protective eyewear and use of the diffuser cover is recommended. 2 TPS63030EVM-658 User's Guide SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback Copyright © 2010–2019, Texas Instruments Incorporated Test Results www.ti.com 3 Test Results 100 95 90 Efficiency - % 85 80 75 70 65 60 55 50 2 2.5 3 3.5 4 4.5 VI - Input Voltage 5 5.5 Figure 1. Efficiency vs Input Voltage 4 Design Procedure for Divider Network The TPS63030 feedback voltage (FB) is set to 0.50 V. If this were used for current regulation, the power dissipation of the sense resistor will be high. To reduce power dissipation on the current sense resistor R3, a reference voltage of 2.5 V is summed with it, thereby reducing Vsense voltage and power dissipation in R3. The first step is to choose the LED operating current and Vsense voltage, which determines the value for R3. There is a trade off between power dissipation on R3 and accuracy of regulation point. As Vsense is increased, the current regulation accuracy improves; the maximum voltage is 0.50 V. As Vsense is decreased, the power dissipation is reduced, but the error due to Vref on resistors R1 and R2 increases. The EVM ILED is set to 350 mA with a Vsense voltage of 0.178 V. Vsense = ILED ´ R3 = 350 mA ´ 510 mW = 0.178 V VR1 = VFB - Vsense = 0.50 V - 0.178 V = 0.322 V VR 2 = VREF - VFB = 2.5 V - 0.50 V = 2.00 V Choose divider current of 0.1 mA. R1 = 0.322 V VR1 = = 3.22 kW 0.1 mA 0.1 mA Standard value is 3.24 kΩ. R2 = 2.00 V VR 2 = = 20 kW 0.1 mA 0.1 mA Standard value is 20 kΩ. Output current can be increased or decreased by changing R3. For 700-mA output current, decrease R3 to 250 mΩ. Changes in the reference voltage, R1 or R2, also can be used to change the LED current. SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback TPS63030EVM-658 User's Guide Copyright © 2010–2019, Texas Instruments Incorporated 3 Board Layout 5 www.ti.com Board Layout This section provides the board layout of the TPS63030EVM-658. A 2-layer PCB with a number of vias near the LED was used to help with the thermal dissipation of the WLED. Users must carefully design their system to handle the thermal challenges raised by the WLEDs. Board layout is critical for all switch-mode power supplies. See the data sheet (SLVS893) for specific layout and routing guidelines. Figure 2. Assembly Layer Including Silk Screen 4 TPS63030EVM-658 User's Guide SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback Copyright © 2010–2019, Texas Instruments Incorporated Board Layout www.ti.com Figure 3. Top Copper Layer Figure 4. Bottom Copper Layer SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback TPS63030EVM-658 User's Guide Copyright © 2010–2019, Texas Instruments Incorporated 5 Schematic and Bill of Materials 6 www.ti.com Schematic and Bill of Materials TPS63030EVM-658 Schematic 6 TPS63030EVM-658 User's Guide U2 1000pF Ref C4 R5 249 R2 20.0K C3 C5 10uF 10uF 1.5 uH L1 TL431AIDBZ 3.24K R1 C2 C1 10uF 10uF LUWCVBP R6 0 R3 6.1 0.51 This section contains a schematic and bill of materials for the TPS63030EVM-658. SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback Copyright © 2010–2019, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com 6.2 TPS63030EVM-658 Bill of Materials Table 2. Bill of Materials Count RefDes Value Description Size Part Number MFR 4 C1, C2, C3, C5 10uF Capacitor, Ceramic, 6.3V, X5R, 20% 0603 GRM188R60J106ME47D Murata 1 C4 1000pF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 1 D1 LUWCVBP LED, 350mA 3.10 x 3.10 mm LUW CVBP.CE-5L8L-GMKM-8E8G Osram 1 L1 1.5 µH Inductor, Power, 3.1A, 22mΩ, ±20% 0.157 x 0.157 inch XFL4020-152ME Coilcraft 1 R1 3.24K Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R2 20.0K Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R3 0.51 Resistor, Chip, 1/10W, 1% 0805 Std Std 2 R4, R7 1.00M Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R5 249 Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R6 0 Resistor, Chip, 1/16W, 1% 0603 Std Std 1 U1 TPS63030DSK IC, DC-DC Converter DSK TPS63030DSK TI 1 U2 TL431AIDBZ IC, Precision Adjustable Shunt Regulator SOT23-3 TL431AIDBZ TI SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback TPS63030EVM-658 User's Guide Copyright © 2010–2019, Texas Instruments Incorporated 7 Revision History www.ti.com Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Original (August 2010) to A Revision ..................................................................................................... Page • • 8 Updated D1 in Section 6.1 from "D1 LUWCP7P" to "D1 LUWCVBP" ............................................................. 6 Updated D1 line in Table 2............................................................................................................... 7 Revision History SLVU391A – August 2010 – Revised July 2019 Submit Documentation Feedback Copyright © 2010–2019, Texas Instruments Incorporated Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. 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TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM Warnings and Restrictions It is important to operate this EVM within the input voltage range of 1.8 V to 5.5 V and the output voltage range of 3 V to 5 V . Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 80°C. The EVM is designed to operate properly with certain components above 80°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. 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