TPS62184EVM-581

Table of Contents www.ti.com User’s Guide TPS62184 Buck Converter Evaluation Module User's Guide ABSTRACT This user’s guide describes the characteristics, operation, and use of TI's TPS62184 evaluation module (EVM). The TPS62184EVM-581 (PWR581-002) facilitates the evaluation of the TPS62184 6-A, 2-phase buck converter. The EVM outputs a 1.8-V output voltage from input voltages between 4 V and 17 V. The TPS62184 features Automatic Efficiency Enhancement ( AEE™) to deliver efficiencies in excess of 90% across the load current range. The small solution size (99 mm2) and low profile possible enable a very dense power solution in tablets, Solid State Drives (SSDs), and other portable devices. This user’s guide includes setup instructions for the hardware, a printed-circuit board layout for the EVM, a schematic diagram, a bill of materials (BOM), and test results for the EVM. Table of Contents 1 Introduction.............................................................................................................................................................................2 1.1 Performance Specification................................................................................................................................................. 2 1.2 Modifications...................................................................................................................................................................... 2 2 Setup........................................................................................................................................................................................3 2.1 Input/Output Connector Descriptions................................................................................................................................. 3 2.2 Setup..................................................................................................................................................................................3 3 TPS62184EVM-581 Test Results............................................................................................................................................4 4 Board Layout...........................................................................................................................................................................5 5 Schematic and Bill of Materials.............................................................................................................................................8 5.1 Schematic.......................................................................................................................................................................... 9 5.2 Bill of Materials.................................................................................................................................................................10 6 Revision History................................................................................................................................................................... 10 List of Figures Figure 3-1. Thermal Performance (VIN = 17 V, Load = 6 A).........................................................................................................4 Figure 3-2. Loop Measurement (VIN = 12 V, Load = 6 A, 50-Ω resistor added in series with R1)............................................... 4 Figure 4-1. Assembly Layer.........................................................................................................................................................5 Figure 4-2. Top Silk Layer............................................................................................................................................................5 Figure 4-3. Top Layer...................................................................................................................................................................6 Figure 4-4. Internal Layer 1......................................................................................................................................................... 6 Figure 4-5. Internal Layer 2......................................................................................................................................................... 7 Figure 4-6. Bottom Layer............................................................................................................................................................. 7 Figure 5-1. TPS62184EVM-581 Schematic.................................................................................................................................9 List of Tables Table 1-1. Performance Specification Summary..........................................................................................................................2 Table 5-1. TPS62184EVM-581 Bill of Materials.........................................................................................................................10 Trademarks AEE™ is a trademark of Texas Instruments. All trademarks are the property of their respective owners. SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 www.ti.com Introduction 1 Introduction The TPS62184 is a 6-A, dual-phase, synchronous, step-down converter in a 2 × 3-mm, WCSP package. 1.1 Performance Specification Table 1-1 provides a summary of the TPS62184EVM-581 performance specifications. All specifications are given for an ambient temperature of 25°C. Table 1-1. Performance Specification Summary Specification Test Conditions Input voltage Min 4 Output voltage setpoint Output current Soft-start time Typ Max 17 1.8 Unit V V VOUT ≤ 1.8 V 0 6 VOUT > 1.8 V and ≤ 2.5 V 0 5.5 A VOUT > 2.5 V and ≤ 3.5 V 0 5 A Ramp time of VOUT 825 A µs 1.2 Modifications The output voltage of the EVM may be adjusted within the range stated in the device data sheet. Additional input and output capacitors can also be added. A lower profile inductor may also be used to reduce the total solution height. Finally, the input voltage at which the IC turns on can be adjusted with two resistors. 1.2.1 Changing the Output Voltage The output voltage may be adjusted by changing the values of R1 and R2. Be sure and keep the output voltage within the range specified in the device data sheet. Setting an output voltage above 1.8 V reduces the maximum amount of current which can reliably be delivered, per Table 1-1. See the data sheet for details. 1.2.2 Input and Output Capacitors C13 and C14 are provided for additional input capacitors. These capacitors are not required for proper operation but can be used to reduce the input voltage ripple. C7, C8, C9, C10, C11, and C12 are provided for additional output capacitors. These capacitors are not required for proper operation but can be used to reduce the output voltage ripple and to improve the load transient response. The total output capacitance must remain within the recommended range in the TPS62184 data sheet (SLVSCQ5) for proper operation. 1.2.3 Lower Profile Solutions The TPS62184EVM-581 supports modifications to achieve a lower total solution profile (height). The current EVM gives a maximum height of 2.1 mm. To obtain a lower profile solution, replace both inductors L1 and L2 with a suitable inductor of lower height. An option is the DFE252012P series from Toko which has a maximum profile of 1.2 mm. These inductors fit well on the existing pads for L1 and L2. 1.2.4 Configurable Enable Threshold Voltage With JP1 removed, R4 and R5 can be installed to set a user-selectable input voltage at which the IC turns on. See the equations in the data sheet for details of calculating the resistor values. 2 TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback www.ti.com Setup 2 Setup This section describes how to properly use the TPS62184EVM-581. 2.1 Input/Output Connector Descriptions J1 – VIN Positive input connection from the input supply for the EVM J2 – S+/S– Input voltage sense connections. Measure the input voltage at this point. J3 – GND Return connection from the input supply for the EVM J4 – VOUT Output voltage connection J5 – S+/S– Output voltage sense connections. Measure the output voltage at this point. J6 – GND Output return connection J7 – PG/GND The PG output appears on pin 1 of this header with a convenient ground on pin 2 J8 – SS/TR/GND The SS/TR pin voltage appears on pin 2 of this header with a convenient ground on pin 1 JP1 – EN EN pin input jumper. Place the supplied jumper across ON and EN to turn on the IC. Place the jumper across OFF and EN to turn off the IC. Remove the jumper to set a configurable enable threshold voltage with R4 and R5. JP2 – PG Pullup Voltage PG pin pullup voltage jumper. Place the supplied jumper on JP2 to connect the PG pin pullup resistor to the output voltage. Alternatively, the jumper can be removed and a different voltage can be supplied on pin 1 to pull up the PG pin to a different level. This externally applied voltage must remain below 7 V. 2.2 Setup To operate the EVM, set jumpers JP1 and JP2 to the desired positions per Section 2.1. Connect the input supply to J1 and J3 and connect the load to J4 and J6. SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 www.ti.com TPS62184EVM-581 Test Results 3 TPS62184EVM-581 Test Results The TPS62184EVM-581 was used to take the data in the TPS62184 data sheet (SLVSCQ5). See the device data sheet for the performance of this EVM. Figure 3-1. Thermal Performance (VIN = 17 V, Load = 6 A) WARNING Hot surface. Contact may cause burns. Do not touch! Figure 3-2. Loop Measurement (VIN = 12 V, Load = 6 A, 50-Ω resistor added in series with R1) 4 TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback Board Layout www.ti.com 4 Board Layout This section provides the TPS62184EVM-581 board layout and illustrations. The Gerbers are available on the EVM product page: TPS62184EVM-581. Rev. B of the PCB just filled the vias under U1 to improve manufacturability. No copper changes were made from Rev. A. Figure 4-1. Assembly Layer Figure 4-2. Top Silk Layer SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 5 www.ti.com Board Layout Figure 4-3. Top Layer Figure 4-4. Internal Layer 1 6 TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback Board Layout www.ti.com Figure 4-5. Internal Layer 2 Figure 4-6. Bottom Layer SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 7 Schematic and Bill of Materials www.ti.com 5 Schematic and Bill of Materials This section provides the TPS62184EVM-581 schematic and bill of materials. 8 TPS62184 Buck Converter Evaluation Module User's Guide SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated PC14 www.ti.com Schematic and Bill of Materials 5.1 Schematic Figure 5-1 illustrates the TPS62184EVM-581 schematic. DNP TP1 XFL4020-102MEB U1 A1 B1 C1 C1 22µF D1 E1 F1 C2 22µF E4 D4 L1 VIN1 VIN1 VIN1 VIN2 VIN2 VIN2 SW1 SW1 SW1 A2 B2 C2 SW2 SW2 SW2 D2 E2 F2 VO A4 DNP TP2 L2 EN R1 187k SS/TR FB B4 PG F4 AGND PGND PGND PGND PGND PGND PGND C4 A3 B3 C3 D3 E3 F3 C3 47µF XFL4020-102MEB 2 C4 DNPC7 47µF JP2 1 R2 150k R3 470k TPS62184YZFR C5 3300pF Figure 5-1. TPS62184EVM-581 Schematic SLVUAD3A – MARCH 2015 – REVISED MAY 2021 Submit Document Feedback TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 9 DNPC8 DN Schematic and Bill of Materials www.ti.com 5.2 Bill of Materials Table 5-1 lists the BOM for this EVM. Table 5-1. TPS62184EVM-581 Bill of Materials Quantity Ref Des Value Description Size Part Number Manufacturer 2 C1, C2 22uF CAP, CERM, 22uF, 25V, +/-20%, X5R, 0805 0805 GRM21BR61E226ME44L MuRata 2 C3, C4 47uF CAP, CERM, 47uF, 10V, +/-20%, X5R, 0805 0805 GRM21BR61A476ME15L MuRata 1 C5 3300pF CAP, CERM, 3300pF, 25V, +/-10%, X7R, 0603 0603 GRM188R71E332KA01D MuRata 1 C6 100uF CAP, TA, 100uF, 20V, +/-10%, 0.5 ohm, SMD 7343-43 293D107X9020E2TE3 Vishay-Sprague 2 L1, L2 1uH Inductor, Shielded, Composite, 1uH, SMD 4x2x4mm XFL4020-102ME or XAL4020-102ME Coilcraft 1 R1 187k RES, 187k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07187KL Yageo America 1 R2 150k RES, 150k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07150KL Yageo America 1 R3 470k RES, 470k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07470KL Yageo America 1 U1 TPS62184 4 - 17V, 6A, 2-Phase Step-Down Converter 2x3mm TPS62184YZF Texas Instruments 6 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (March 2015) 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 TPS62184 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVUAD3A – MARCH 2015 – 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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