TPS65261EVM-650

www.ti.com Table of Contents User’s Guide TPS65261 Buck Converter Evaluation Module User's Guide ABSTRACT This document presents the information required to operate the TPS65261 PMIC as well as the support documentation including schematic, layout, hardware setup, and bill of materials (BOM). Table of Contents 1 Background.............................................................................................................................................................................2 2 TPS65261 Schematic..............................................................................................................................................................3 3 Board Layout...........................................................................................................................................................................4 4 Bench Test Setup Conditions................................................................................................................................................ 6 5 Power-Up Procedure.............................................................................................................................................................. 8 6 Bill of Materials....................................................................................................................................................................... 9 7 Revision History................................................................................................................................................................... 10 List of Figures Figure 2-1. TPS65261 Schematic................................................................................................................................................3 Figure 3-1. Component Placement (Top Layer)...........................................................................................................................4 Figure 3-2. Board Layout (Top Layer)..........................................................................................................................................5 Figure 3-3. Board Layout (Second Layer)................................................................................................................................... 5 Figure 3-4. Board Layout (Third Layer)....................................................................................................................................... 5 Figure 3-5. Board Layout (Bottom Layer).................................................................................................................................... 5 Figure 4-1. Header Descriptions and Jumper Placement............................................................................................................6 Trademarks All trademarks are the property of their respective owners. SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 Background www.ti.com 1 Background The TPS65261 PMIC is a triple 3-A, 2-A, 2-A output current, synchronous step-down (buck) converter with an operational range of 4.5 V to 18 V. The TPS65261 features an automatic power sequence with connecting MODE pin to V7V and configuring EN1/2/3 pins. The device also features an open drain RESET signal to monitor power down. The TPS65261 operates in pulse skipping mode (PSM) light load. As there are many possible options to set the converters, Table 1-1 presents the performance specification summary for the EVM. Table 1-1. Summary of Performance Test Conditions Performance VIN = 4.5 V to 18 V fSW = 600 kHz (25°C ambient) BUCK1, 1.2 V, up to 3 A BUCK2, 3.3 V, up to 2 A BUCK3, 1.8 V, up to 2 A RESET, pull low when VDIV lower than 1.23 V This evaluation module is designed to provide access to the features of the TPS65261. Some modifications can be made to this module to test performance at different input and output voltages, current and switching frequency. Contact the TI Field Applications group for advice on these matters. 2 TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback www.ti.com TPS65261 Schematic 2 TPS65261 Schematic Figure 2-1 shows the EVM schematic. R1 C1 0.047µF TP1 VOUT1 1.2V 3A L1 0 TP2 VIN 12V TP5 C7 10µF J4 C8 10µF C9 10µF 30 VDIV V7V 5 C10 GND 1µF TP9 V7V R9 100k TP7 C2 22µF 4.7µH 28 12 13 29 VIN 1 2 3 GND 2 TP8 31 32 1 EN1 EN2 EN3 R11 100k MODE C17 C19 0.01µF C20 0.01µF 4 U1 PVIN1 PVIN2 PVIN3 VIN VDIV 26 COMP1 RESET BST2 PGOOD LX2 EN1 EN2 EN3 FB2 MODE SS1 8 SS2 COMP2 20 73.2k GND 21 20.0k R8 9 3300pF C11 0.047µF 6 GND VFB2 16 LX3 15 R15 ROSC COMP3 AGND PGND1 PGND2 PGND3 19 C18 0.047µF C5 DNI 82pF 27 11 14 22pF C24 R18 30k VOUT2 3.3V 2A TP6 C12 22µF GND C13 22µF GND 1 2 R10 0 TP11 TP15 J2 C15 DNI VFB2 R14 22pF GND R13 10.0k 45.3k TP12 VOUT3 1.8V 2A GND C21 22µF 4.7µH C23 GND GND L3 VFB3 VFB1 R5 10.0k 10.0k GND 18 PAD TPS65261RHB GND 2200pF 0 SS3 J1 GND 22pF C16 R12 30k TP3 R6 4.7µH 7 R2 0 L2 0 10 C3 22µF TP4 22pF C6 R3 22 VFB1 23 BST3 FB3 R17 C4 C14 0.01µF GND LX1 FB1 V7V 24 17 BST1 25 1 2 GND C22 22µF GND 2200pF R16 0 TP14 TP13 J3 C25 DNI VFB3 R20 GND 2 1 22pF GND R19 10.0k 20.0k GND GND GND VIN V7V R4 147k R21 100k J5 R25 51k C26 DNI GND R26 51k EN1 R23 100k J7 1 2 3 GND GND J6 1 2 3 VDIV R7 20.0k R22 100k C27 DNI R27 51k GND GND EN2 GND J8 1 2 3 1 2 3 TP10 GND GND GND C28 DNI EN3 MODE Figure 2-1. TPS65261 Schematic SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 Board Layout www.ti.com 3 Board Layout Figure 3-1 illustrates the PCB layout for this EVM. Figure 3-1. Component Placement (Top Layer) 4 TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback www.ti.com Board Layout 3.1 EVM Layout Figure 3-2 through Figure 3-5 illustrate the PCB layout for this EVM. Figure 3-2. Board Layout (Top Layer) Figure 3-3. Board Layout (Second Layer) Figure 3-4. Board Layout (Third Layer) Figure 3-5. Board Layout (Bottom Layer) SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 5 www.ti.com Bench Test Setup Conditions 4 Bench Test Setup Conditions 4.1 Headers Description and Jumper Placement Figure 4-1 illustrates the header description and jumper placement on the EVM. Figure 4-1. Header Descriptions and Jumper Placement Test points: A: LX of VOUT1 B: LX of VOUT2 C: LX of VOUT3 VOUT1, VOUT2, VOUT3, VIN, PGOOD, RESET, V7V 6 TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback www.ti.com Bench Test Setup Conditions Table 4-1 lists the I/O connections. Table 4-1. Input/Output Connection Number Function J1 BUCK1 connector Description Output of BUCK1 J2 BUCK2 connector Output of BUCK2 J3 BUCK3 connector Output of BUCK3 J4 VIN connector Apply power supply to this connector 4.2 Jumpers and Switches Table 4-2 lists the jumpers on the EVM. Table 4-2. Jumpers Jumper Function Placement J5 Buck1 enable (EN1) Connect EN1 to GND to disable VOUT1, connect EN1 to VIN through a 100-kΩ resistor to enable VOUT1; leave open to enable VOUT1 J6 Buck2 enable (EN2) Connect EN2 to GND to disable VOUT2, connect EN2 to VIN through a 100-kΩ resistor to enable VOUT2; leave open to enable VOUT2 J7 Buck3 enable (EN3) Connect EN3 to GND to disable VOUT3, connect EN3 to VIN through a 100-kΩ resistor to enable VOUT3; leave open to enable VOUT3 J8 Mode Power sequencing mode control pin. Connect this pin to GND to set power sequence with dedicated enable pin; connect this pin to V7V, set the power sequence with the pre-defined power up and power down sequence. SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 7 Power-Up Procedure www.ti.com 5 Power-Up Procedure Power sequence with dedicated enable pin: 1. 2. 3. 4. Connect J8 to GND Apply 4.5 V - 18 V to J4 Toggle J5, J6, or J7 to enable VOUT1, VOUT2, and VOUT3, respectively Apply loads to the output connectors Power sequence with the pre-defined power up and power down sequence: 1. 2. 3. 4. 5. 8 Connect J8 to V7V Connect J5 to High (or Low), J6 to High (or Low) Apply 4.5 V - 18 V to J4 Toggle J7 to enable VOUT1, VOUT2, and VOUT3 Apply loads to the output connectors. TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback www.ti.com Bill of Materials 6 Bill of Materials Table 6-1 lists the BOM for this EVM. Table 6-1. TPS65261 Bill of Materials Designator Qty Value Description !PCB1 1 Package Reference Part Number Manufacturer PWR650 C1, C11, C18 3 0.047uF CAP, CERM, 0.047uF, 50V, +/-10%, X7R, 0603 Any 0603 C1608X7R1H473K C2, C3, C12, C13, C21, C22 6 22uF TDK CAP, CERM, 22uF, 16V, +/-20%, X5R, 1206 1206 1206YD226MAT2A AVX C4, C14, C15, C23, C25 5 C5 1 22pF CAP, CERM, 22pF, 50V, +/-5%, C0G/NP0, 0603 0603 06035A220JAT2A AVX 82pF CAP, CERM, 82pF, 50V, +/-5%, C0G/NP0, 0603 0603 06035A820JAT2A C6 AVX 1 3300pF CAP, CERM, 3300pF, 50V, +/-10%, X7R, 0603 0603 C0603C332K5RACTU Kemet C7, C8, C9 3 10uF CAP, CERM, 10uF, 25V, +/-10%, X5R, 1206 1206 GRM31CR61E106KA12L MuRata C10 1 1uF CAP, CERM, 1uF, 25V, +/-10%, X7R, 0603 0603 C1608X7R1E105K080AB TDK C16, C24 2 2200pF CAP, CERM, 2200pF, 50V, +/-10%, X7R, 0603 0603 C0603C222K5RACTU Kemet C17, C19, C20 3 0.01uF CAP, CERM, 0.01uF, 50V, +/-5%, X7R, 0603 0603 C0603C103J5RACTU Kemet C26, C27, C28 0 DNI CAP, CERM, 0.01uF, 50V, +/-5%, X7R, 0603 0603 C0603C103J5RACTU Kemet J1, J2, J3, J4 4 Terminal Block, 6A, 3.5mm Pitch, 2-Pos, TH 7.0x8.2x6.5mm ED555/2DS On-Shore Technology J5, J6, J7, J8 4 Header, 100mil, 3x1, Tin plated, TH Header, 3 PIN, 100mil, Tin PEC03SAAN Sullins Connector Solutions L1, L2, L3 3 Inductor, Shielded Drum Core, Superflux, 4.7uH, 6A, 0.02 ohm, SMD WE-HC4 744311470 Wurth Elektronik eiSos LBL1 1 Thermal Transfer Printable Labels, 0.650" W x 0.200" H - 10,000 per roll PCB Label 0.650"H x 0.200"W THT-14-423-10 Brady Printed Circuit Board 4.7uH R1, R2, R8, R10, R15, R16 6 0 RES, 0 ohm, 5%, 0.1W, 0603 0603 CRCW06030000Z0EA Vishay-Dale R3, R7, R20 3 20.0k RES, 20.0k ohm, 1%, 0.1W, 0603 0603 CRCW060320K0FKEA Vishay-Dale R4 1 147k RES, 147k ohm, 1%, 0.1W, 0603 0603 CRCW0603147KFKEA Vishay-Dale R5, R6, R13, R19 4 10.0k RES, 10.0k ohm, 1%, 0.1W, 0603 0603 CRCW060310K0FKEA Vishay-Dale R9, R11, R21, R22, R23 5 100k RES, 100k ohm, 1%, 0.1W, 0603 0603 CRCW0603100KFKEA Vishay-Dale R12, R18 2 30k RES, 30k ohm, 5%, 0.1W, 0603 0603 CRCW060330K0JNEA Vishay-Dale R14 1 45.3k RES, 45.3k ohm, 1%, 0.1W, 0603 0603 CRCW060345K3FKEA Vishay-Dale R17 1 73.2k RES, 73.2k ohm, 1%, 0.1W, 0603 0603 CRCW060373K2FKEA Vishay-Dale R25, R26, R27 3 51k RES, 51k ohm, 5%, 0.1W, 0603 0603 CRCW060351K0JNEA Vishay-Dale SH-J1 1 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M TP1, TP2, TP6, TP7, TP8, TP9, TP12 7 White Test Point, Miniature, White, TH White Miniature Testpoint 5002 Keystone TP3, TP5, TP10, TP13, TP15 5 Black Test Point, Miniature, Black, TH Black Miniature Testpoint 5001 Keystone TP4, TP11, TP14 0 DNI Test Point, Miniature, White, TH White Miniature Testpoint 5002 Keystone U1 1 4.5V to 18V Input Voltage, 3A/2A/2A Output Current Triple Synchronous StepDown Converter, RHB0032E RHB0032E TPS65261RHB Texas Instruments Note: Unless otherwise noted in the columns, all parts may be substituted with equivalents. SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 9 Revision History www.ti.com 7 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (June 2014) to Revision A (May 2021) Page • Updated user's guide title................................................................................................................................... 2 • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 10 TPS65261 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUA85A – JUNE 2014 – REVISED MAY 2021 Submit Document Feedback IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. 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