TPS62160EVM-627

www.ti.com Table of Contents User’s Guide TPS621x0 Buck Converter Evaluation Module User's Guide ABSTRACT This user’s guide describes the characteristics, operation, and use of the Texas Instruments TPS62160 and TPS62170 evaluation modules (EVM). These EVMs are designed to help the user easily evaluate and test the operation and functionality of the TPS62160 and TPS62170. This user’s guide includes setup instructions for the hardware, printed-circuit board layouts for the EVMs, a schematic diagram, a bill of materials, and test results for the EVMs. Table of Contents 1 Introduction.............................................................................................................................................................................2 1.1 Background........................................................................................................................................................................ 2 1.2 Performance Specification................................................................................................................................................. 2 1.3 Modifications...................................................................................................................................................................... 2 2 Setup........................................................................................................................................................................................4 2.1 Input/Output Connector Descriptions................................................................................................................................. 4 2.2 Setup..................................................................................................................................................................................4 3 TPS621x0EVM-627 Test Results............................................................................................................................................5 4 Board Layout......................................................................................................................................................................... 11 5 Schematic and Bill of Materials...........................................................................................................................................13 5.1 Schematic........................................................................................................................................................................ 13 5.2 Bill of Materials.................................................................................................................................................................14 6 Revision History................................................................................................................................................................... 14 List of Figures Figure 1-1. Loop Response Measurement Modification.............................................................................................................. 3 Figure 3-1. Efficiency................................................................................................................................................................... 5 Figure 3-2. Load Regulation........................................................................................................................................................ 5 Figure 3-3. Line Regulation With Iout = 0.5 A..............................................................................................................................5 Figure 3-4. Loop Response With Vin = 12 V and Iout = 0.5 A..................................................................................................... 6 Figure 3-5. Input Voltage Ripple With Vin = 12 V and Iout = 1 A................................................................................................. 6 Figure 3-6. Output Voltage Ripple With Vin = 12 V and Iout = 1 A.............................................................................................. 7 Figure 3-7. Load Transient Response With Vin = 12 V................................................................................................................7 Figure 3-8. Start-Up on Vin With 0.5-A Load............................................................................................................................... 8 Figure 3-9. Start-Up on EN with 0.5-A Load................................................................................................................................ 8 Figure 3-10. Shutdown on EN With 0.5-A Load...........................................................................................................................9 Figure 3-11. Prebias Start-Up and Shutdown on EN With 0.5-A Load........................................................................................ 9 Figure 3-12. Thermal Performance With Vin = 12 V and Iout = 1 A.......................................................................................... 10 Figure 4-1. Assembly Layer....................................................................................................................................................... 11 Figure 4-2. Top Layer Routing....................................................................................................................................................11 Figure 4-3. Bottom Layer Routing..............................................................................................................................................12 Figure 5-1. TPS621x0EVM-627 Schematic...............................................................................................................................13 List of Tables Table 1-1. Performance Specification Summary..........................................................................................................................2 Table 5-1. TPS621x0EVM-627 Bill of Materials.........................................................................................................................14 SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 Introduction www.ti.com 1 Introduction The TPS62160 is a 1-A, synchronous, step-down converter in a 2x2-mm, 8-pin WSON package. Both fixed and adjustable output voltage units are available. The TPS62170 is a 0.5-A, synchronous, step-down converter in a 2x2-mm, 8-pin WSON package. Both fixed and adjustable output voltage units are available. 1.1 Background The TPS62160EVM-627 (HPA627-001) uses the TPS62160 adjustable version and is set to a 3.3-V output. The EVM operates with full-rated performance with an input voltage between 3.7 V and 17 V. The TPS62170EVM-627 (HPA627-002) uses the TPS62170 adjustable version and is set to a 3.3-V output. The EVM operates with full-rated performance with an input voltage between 3.7 V and 17 V. 1.2 Performance Specification Table 1-1 provides a summary of the TPS621x0EVM-627 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 17 V 3.327 3.427 V 3.7 3.227 Unit Output Voltage PWM Mode of Operation Output Current TPS62160EVM-627 0 1000 mA TPS62170EVM-627 0 500 mA Peak Efficiency 93.1% Soft-Start Time 180 µs 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 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 C4 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. C3 is provided for an additional output capacitor. This capacitor is 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 TPS621x0EVM-627 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 output voltage and the trace that connects to the VOS pin via. These changes are 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. 2 TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Introduction Added Resistor Cut This Trace Figure 1-1. Loop Response Measurement Modification SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 Setup www.ti.com 2 Setup This section describes how to properly use the TPS621x0EVM-627. 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 – PG Pullup Voltage PG pin pullup voltage jumper. Place the supplied jumper on JP2 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 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. 4 TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback www.ti.com TPS621x0EVM-627 Test Results 3 TPS621x0EVM-627 Test Results This section provides test results of the TPS621x0EVM-627. 100 95 VIN = 5 V 90 VIN = 9 V 85 Efficiency (%) 80 75 VIN = 12 V 70 VIN = 15 V VIN = 17 V 65 60 55 50 45 40 0.1 1 10 100 1000 Current (mA) Figure 3-1. Efficiency 0.5 VIN = 15 V 0.4 VIN = 17 V Load Regulation (%) 0.3 VIN = 12 V 0.2 0.1 VIN = 9 V 0 VIN = 5 V -0.1 -0.2 0.1 1 10 Current (mA) 100 1000 Figure 3-2. Load Regulation 0.15 Line Regulation (%) 0.1 0.05 0 -0.05 -0.1 3 5 7 9 11 VI - Input Voltage - (V) 13 15 17 Figure 3-3. Line Regulation With Iout = 0.5 A SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 5 TPS621x0EVM-627 Test Results www.ti.com 60 180 Gain - dB 150 40 120 30 90 20 60 10 30 Gain 0 0 -10 -30 -20 -60 -30 -90 -40 -120 -50 Phase - deg. Phase 50 -150 -60 1k 10k 100k -180 1M f - Frequency - Hz Figure 3-4. Loop Response With Vin = 12 V and Iout = 0.5 A Vin (AC Coupled) 20 mV/div Iind 500 mA/div SW 10 V/div t - Time - 200 ns/div Figure 3-5. Input Voltage Ripple With Vin = 12 V and Iout = 1 A 6 TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback www.ti.com TPS621x0EVM-627 Test Results Vout (AC Coupled) 10 mV/div Iind 500 mA/div SW 10 V/div t - Time - 500 ns/div Figure 3-6. Output Voltage Ripple With Vin = 12 V and Iout = 1 A Vout (AC Coupled) 20 mV/div Iout 500 mA/div 500 mA to 750 mA Load step t - Time - 2 ms/div Figure 3-7. Load Transient Response With Vin = 12 V SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 7 TPS621x0EVM-627 Test Results www.ti.com Vin 5 V/div EN 5 V/div PG 2 V/div Vout 1 V/div t - Time - 50 ms/div Figure 3-8. Start-Up on Vin With 0.5-A Load Vin 10 V/div EN 10 V/div PG 2 V/div Vout 1 V/div t - Time - 50 ms/div Figure 3-9. Start-Up on EN with 0.5-A Load 8 TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback www.ti.com TPS621x0EVM-627 Test Results Vin 10 V/div EN 10 V/div PG 2 V/div Vout 1 V/div t - Time - 200 ms/div Figure 3-10. Shutdown on EN With 0.5-A Load Vin 10 V/div EN 2 V/div PG 2 V/div Vout 1 V/div 1.5 V Pre-bias t - Time - 100 ms/div Figure 3-11. Prebias Start-Up and Shutdown on EN With 0.5-A Load SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 9 TPS621x0EVM-627 Test Results www.ti.com Figure 3-12. Thermal Performance With Vin = 12 V and Iout = 1 A 10 TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Board Layout 4 Board Layout This section provides the TPS621x0EVM-627 board layout and illustrations. Figure 4-1. Assembly Layer Figure 4-2. Top Layer Routing SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 11 Board Layout www.ti.com Figure 4-3. Bottom Layer Routing 12 TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Schematic and Bill of Materials 5 Schematic and Bill of Materials This section provides the TPS621x0EVM-627 schematic and bill of materials. + 5.1 Schematic Figure 5-1. TPS621x0EVM-627 Schematic SLVU483A – OCTOBER 2011 – REVISED JUNE 2021 Submit Document Feedback TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 13 Schematic and Bill of Materials www.ti.com 5.2 Bill of Materials Table 5-1. TPS621x0EVM-627 Bill of Materials Count -001 -002 RefDes Value Description Size Part Number MFR 1 1 C1 10 µF Capacitor, Ceramic, 25V, X5R, 20% 0805 Std Std 1 1 C2 22 µF Capacitor, Ceramic, 6.3V, X5R, 20% 0805 Std Std 1 1 C5 68 µF Capacitor, Tantalum, 35V, 68uF, ±20% 7361[V] TPSV686M035R0150 AVX 1 1 L1 2.2 µH Inductor, SMT, 2.2 uH, 1.4A, 60-milliohm 2.80 X 3.00 mm VLF3012ST-2R2M1R4 TDK 1 1 R1 1.21M Resistor, Chip, 1/16W, 1% 0603 Std Std 1 1 R2 383k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 1 R3 100k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 0 U1 TPS62160DSG IC, 17V 1A Buck Converter 2 x 2 mm WSON TPS62160DSG TI 0 1 U1 TPS62170DSG IC, 17V 0.5A Buck Converter 2 x 2 mm WSON TPS62170DSG TI 6 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (October 2011) to Revision A (June 2021) Page • Updated user's guide title................................................................................................................................... 2 • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 14 TPS621x0 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU483A – OCTOBER 2011 – REVISED JUNE 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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