TPS62175EVM-098

www.ti.com Table of Contents User’s Guide TPS62175 Buck Converter Evaluation Module User's Guide ABSTRACT This user’s guide describes the characteristics, operation, and use of the Texas Instruments TPS62175 evaluation module (EVM). This EVM is designed to help the user easily evaluate and test the operation and functionality of the TPS62175. The EVM converts a 4.75-V to 28-V input voltage to a regulated 3.3-V output voltage that delivers 500 mA. 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, and test results for the EVM. Table of Contents 1 Introduction.............................................................................................................................................................................2 1.1 Background........................................................................................................................................................................ 2 1.2 Performance Specification................................................................................................................................................. 3 1.3 Modifications...................................................................................................................................................................... 3 2 Setup........................................................................................................................................................................................5 2.1 Input/Output Connector Descriptions................................................................................................................................. 5 2.2 Setup..................................................................................................................................................................................5 3 TPS62175EVM-098 Test Results............................................................................................................................................6 4 Board Layout...........................................................................................................................................................................7 5 Schematic and Bill of Materials........................................................................................................................................... 11 5.1 Schematic.........................................................................................................................................................................11 5.2 Bill of Materials.................................................................................................................................................................12 6 Revision History................................................................................................................................................................... 12 List of Figures Figure 1-1. Loop Response Measurement Modification.............................................................................................................. 4 Figure 3-1. Thermal Performance (VIN = 12 V, Load = 500 mA)..................................................................................................6 Figure 4-1. Assembly Layer.........................................................................................................................................................7 Figure 4-2. Top Silk Layer............................................................................................................................................................8 Figure 4-3. Top Layer...................................................................................................................................................................9 Figure 4-4. Bottom Layer........................................................................................................................................................... 10 Figure 5-1. TPS62175EVM-098 Schematic............................................................................................................................... 11 List of Tables Table 1-1. Performance Specification Summary..........................................................................................................................3 Table 5-1. TPS62175EVM-098 Bill of Materials.........................................................................................................................12 SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 TPS62175 Buck Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 1 Introduction www.ti.com 1 Introduction The TPS62175 is a 500-mA, synchronous, step-down converter in a 2x3-mm, 10-pin WSON package. Both fixed and adjustable output voltage units are available. 1.1 Background The TPS62175EVM-098 (PWR098-001) uses the TPS62175 adjustable version and is set to a 3.3-V output. The EVM operates with full-rated performance with an input voltage between 4.75 V and 28 V. 2 TPS62175 Buck Converter Evaluation Module User's Guide SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Introduction 1.2 Performance Specification Table 1-1 provides a summary of the TPS62175EVM-098 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 Typ Max 28 V 3.33 3.39 V 500 mA 4.75 Output Voltage DC setpoint; does not include voltage ripple Output Current SLEEP = HIGH (OFF) Peak Efficiency VIN = 4.75 V Soft-Start Time Ramp Time of VOUT Soft-Start Delay Time Time from HIGH EN to Start of VOUT Ramp 3.27 0 Unit 92.2% 330 µs 1 ms 1.3 Modifications The printed-circuit board (PCB) for this EVM is designed to accommodate both the fixed and adjustable voltage versions of this integrated circuit (IC). Additional input and output capacitors can also be added. Finally, the loop response of the IC can be measured. 1.3.1 Fixed Output Voltage Operation U1 can be replaced with the fixed-voltage version of the IC for evaluation. For fixed-voltage version operation, replace R2 with a 0-Ω resistor and remove R1. 1.3.2 Input and Output Capacitors C3 is provided for an additional input capacitor. This capacitor is not required for proper operation but can be used to reduce the input voltage ripple. C4 and C6 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 data sheet for proper operation. 1.3.3 Loop Response Measurement The loop response of the TPS62175EVM-098 can be measured with two simple changes to the circuitry. First, install a 10-Ω resistor across the pads in the middle of the back of the PCB. The pads are spaced to allow installation of 0805- or 0603-sized resistors. Second, cut the short section of trace between the via on the VOS pin and the output capacitor C2. This change is shown in Figure 1-1. With these changes, an ac signal (10-mV, peak-to-peak amplitude recommended) can be injected into the control loop across the added resistor. SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 TPS62175 Buck Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 3 Introduction www.ti.com Cut trace as shown Figure 1-1. Loop Response Measurement Modification 4 TPS62175 Buck Converter Evaluation Module User's Guide SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Setup 2 Setup This section describes how to properly use the TPS62175EVM-098. 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. 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. JP2 – SLEEP SLEEP pin input jumper. Place the supplied jumper across ON and SLEEP to activate SLEEP mode. Place the jumper across OFF and SLEEP to activate normal mode. JP3 – PG Pullup Voltage PG pin pullup voltage jumper. Place the supplied jumper on JP3 to connect the PG pin pullup resistor to Vout. 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 through JP3 to the desired positions per Section 2.1. Connect the input supply to J1 and J3 and connect the load to J4 and J6. SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 TPS62175 Buck Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 5 TPS62175EVM-098 Test Results www.ti.com 3 TPS62175EVM-098 Test Results The TPS62175EVM-098 was used to take the data in the TPS62175 data sheet, SLVSB35. See the device data sheet for the performance of this EVM. Figure 3-1. Thermal Performance (VIN = 12 V, Load = 500 mA) 6 TPS62175 Buck Converter Evaluation Module User's Guide SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Board Layout 4 Board Layout This section provides the TPS62175EVM-098 board layout and illustrations. The gerbers are available on the EVM product page: TPS62175EVM-098 Figure 4-1. Assembly Layer SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 TPS62175 Buck Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 7 Board Layout www.ti.com Figure 4-2. Top Silk Layer 8 TPS62175 Buck Converter Evaluation Module User's Guide SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Board Layout Figure 4-3. Top Layer SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 TPS62175 Buck Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 9 Board Layout www.ti.com Figure 4-4. Bottom Layer 10 TPS62175 Buck Converter Evaluation Module User's Guide SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Schematic and Bill of Materials 5 Schematic and Bill of Materials This section provides the TPS62175EVM-098 schematic and bill of materials. GND 1 1 2 2 J6 S+ SJ5 1 22uF PG 7 2 1 R3 100k 11 Not Installed See BOM for component usage 2 3 1 OFF SLEEP ON JP2 2 3 1 JP1 ON EN OFF 1 2 GND J3 2 2 VOUT 22uF 1 2.2uF 1 8 SLEEP C1 C3 1 S+ S- J2 2 VIN 4.75V - 28V J1 1 + C5 PGND 3 EN ETPAD VIN 1 U1 AGND 2 6 NC 4 10 2 VOS SW 9 1 TP1 L1 10 uH R2 383k 1 2 R1 1.21M JP3 J7 C2 FB 5 VOUT PG GND C4 1 C6 2 1 J4 VOUT 3.3V 500 mA max 5.1 Schematic Figure 5-1. TPS62175EVM-098 Schematic SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 TPS62175 Buck Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 11 Schematic and Bill of Materials www.ti.com 5.2 Bill of Materials Table 5-1. TPS62175EVM-098 Bill of Materials COUNT RefDes Value Description Size Part Number MFR 1 C1 2.2uF Capacitor, Ceramic, 50V, X5R, 20% 0805 STD STD 1 C2 22uF Capacitor, Ceramic, 6.3V, X5R, 20% 0805 STD STD 1 C5 22uF Capacitor, Tantalum, 50V, ±20% 7343 (D) TPME226M050R1 00 AVX -001 1 L1 10uH Inductor, Power, 1.1 A, 350 mOhm 4 mm x 4 mm LPS4012-103ML Coilcraft 1 R1 1.21M Resistor, Chip, 1/16W, 1% 0603 STD STD 1 R2 383k Resistor, Chip, 1/16W, 1% 0603 STD STD 1 R3 100k Resistor, Chip, 1/16W, 1% 0603 STD STD 1 U1 TPS62175 IC, 28V 0.5A Step-Down Converter with Sleep Mode 2 mm x 3 mm TPS62175DQC TI The TPS62175EVM-098 may be populated with TPS62175 (U1) devices that do not contain the correct top side markings on the top of the device itself. These devices are still fully tested TPS62175 devices and meet the specified electrical characteristics of the data sheet. 6 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (September 2012) to Revision A (June 2021) Page • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 • Updated user's guide title................................................................................................................................... 2 12 TPS62175 Buck Converter Evaluation Module User's Guide SLVU743A – SEPTEMBER 2012 – REVISED JUNE 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 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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