TPS51217EVM-533

www.ti.com Table of Contents User’s Guide TPS51217 Buck Controller Evaluation Module User's Guide ABSTRACT The TPS51217EVM-533 evaluation module (EVM) uses the TPS51217, a small-size single buck controller with adaptive on-time D-CAP™ providing dynamically selectable 0.9-V to 1.2-V output at up to 20 A from input voltages ranging from 8 V to 20 V. Table of Contents 1 Description.............................................................................................................................................................................. 2 2 Electrical Performance Specifications................................................................................................................................. 2 3 Schematic................................................................................................................................................................................3 4 Test Setup................................................................................................................................................................................4 5 Test Procedure........................................................................................................................................................................ 7 6 Performance and Typical Characteristic Curves................................................................................................................. 8 7 EVM Assembly Drawing and PCB Layouts........................................................................................................................ 13 8 List of Materials.....................................................................................................................................................................15 9 References............................................................................................................................................................................ 15 10 Revision History................................................................................................................................................................. 15 Trademarks All trademarks are the property of their respective owners. SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 1 Description www.ti.com 1 Description The TPS51217EVM is designed to use a regulated voltage between 8 V and 20 V to produce dynamically selectable 0.9 V to 1.2 V output at up to 20 A of load current. The TPS51217EVM is designed to demonstrate the TPS51217 in a typical low-voltage application while providing a number of test points to evaluate the performance of the TPS51217. 1.1 Typical Applications • • • Notebook computers I/O supplies System power supplies 1.2 Features • • • • • • Dynamically selectable output voltage from 0.9 V to 1.2 V by 0.1-V step 20-A DC steady state current Supports pre-bias output voltage start-up 340-kHz switching frequency SW1 for enable function Convenient test points for probing critical waveforms 2 Electrical Performance Specifications Table 2-1. TPS51217EVM Electrical Performance Specifications SPECIFICATION TEST CONDITIONS MIN TYP MAX 8 12 20 UNITS INPUT VIN Input voltage range IMAX Maximum input current VIN = 8 V, IOUT = 20 A No load input current VIN = 8 V, IOUT = 0 A 3 A 0.01 4.5 5.0 V mA VV5IN Voltage range 5.5 V IMAX Maximum input current VV5IN = 5 V, VIN = 12 V, IOUT = 20 A 15 mA No load input current VV5IN = 5 V, VIN = 12 V, IOUT = 0 A 0.4 mA VIN = 12 V, (VID1,VID0) = (0,0), IOUT = 10 A 0.9 VIN = 12 V, (VID1,VID0) = (0,1), IOUT = 10 A 1.0 VIN = 12 V, (VID1,VID0) = (1,0), IOUT = 10 A 1.1 OUTPUT VOUT Output voltage VIN = 12 V, (VID1,VID0) = (0,0), IOUT = 10 A 1.2 IOUT Output current Output load current 20 Line Regulation 8 V ≤ VIN ≤ 20 V, VOUT = 0.9 V, IOUT = 20 A 0.3% Load Regulation VIN = 12 V, VOUT = 0.9 V, 1 mA ≤ IOUT ≤ 20 A 0.4% VRIPPLEL IOC VIN = 12 V, VOUT = 0.9 V, IOUT = 20 A Output overcurrent 29 V A mVP-P 28 SYSTEM fSW TA 2 Switching frequency VIN = 8 V, VOUT = 0.9 V, IOUT = 10 A Peak efficiency VIN = 12 V, VOUT = 0.9 88.8% Full load efficiency VIN = 12 V, VOUT = 0.9 V, IOUT = 20 A 84.4% Operating ambient temperature 340 25 TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated kHz °C SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback www.ti.com Schematic + + + + 3 Schematic Figure 3-1. TPS51217EVM-533 Schematic SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 3 Test Setup www.ti.com 4 Test Setup 4.1 Test Equipment Connect the test equipment and the TPS51125AEVM board as shown in Section 4.2. 4.1.1 Voltage Source The input voltage source, VIN, should be a variable DC source between 0 V and 20 V capable of supplying 10 ADC. Connect VIN to J3 as shown in Figure 4-2. The input voltage source V5IN should be variable DC source between 0 V and 5.5 V capable of supplying 1 ADC. Connect V5IN to J1 and J2 as shown in Figure 4-2. 4.1.2 Multimeters A voltmeter between 0 V and 21 V should be used to measure VIN at TP5 (VIN) and TP6 (VIN_GND). A voltmeter between 0 V and 7 V should be used to measure V5IN at TP1 (V5IN) and TP2 (V5IN_GND). A voltmeter between 0 V and 5 V should be used to measure VOUT at TP7 (VOUT) and TP8 (VOUT_GND). A current meter between 0 A and 10 A (A1) as shown in Figure 4-2 is used for VIN input current measurements. A current meter between 0 A and 1 A (A2) as shown in Figure 4-2 is used for V5IN input current measurements. 4.1.3 Pulse Generator A dual-channel pulse generator capable of 250-Hz, 3.3-VP-P pulse output should be used. 4.1.4 Output Load The output load should be an electronic constant resistance mode load capable of between 0 Adc and 30 Adc at 0.9 V to 1.2 V. 4.1.5 Oscilloscope A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope should be set for the following: • • • • • 1-MΩ impedance 20-MHz bandwidth AC coupling 2-µs/division horizontal resolution 50-mV/division vertical resolution Test points TP7 and TP8 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through TP7 and holding the ground barrel TP8 as shown in Figure 4-1. Using a leaded ground connection can induce additional noise due to the large ground loop. TP7 TP8 Figure 4-1. Tip and Barrel Measurement for Output Voltage Ripple 4.1.6 Fan Some of the components in this EVM cam approach temperatures of 60°C during operation. A small fan capable of between 200 LFM and 400 LFM is recommended to reduce component temperatures while the EVM is operating. The EVM should not be probed while the fan is not running. 4 TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback www.ti.com Test Setup 4.1.7 Recommended Wire Gauge For VIN to J3 (between 8-V and 20-V input), the recommended wire size is 1× AWG #14 per input connection, with the total length of wire less than four feet (2-feet input, 2-feet return). For J4 and J5 to LOAD, the minimum recommended wire size is 2× AWG #14, with the total length of wire less than four feet (2-feet output, 2-feet return). 4.2 Recommended Test Setup DC Source V5IN + DC Source VIN _ ON SW1 OFF A1 _ _ TP1 V5IN TP2 V5IN VIN TP5 TP6 VIN_GND J3 GND V5IN_GND + VIN _ V1 VIN_GND V3 TP4 VOUT_GND + _ J5 SW VOUT_GND + TP8 TP7 VOUT VID0 Oscilloscope VOUT J4 Pulse Generator 0V-3.3V + _ A2 + Electronic Load V2 VID1 VID2 TP3 PGOOD HPA533 TPS51217EVM CH1 CH2 FAN Figure 4-2. Recommended Test Setup Figure 4-2 shows the recommended test setup to evaluate the TPS51217EVM. Working at an ESD workstation, make sure that any wrist straps, bootstraps, or mats are connected, referencing the user to earth ground before power is applied to the EVM. SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 5 Test Setup www.ti.com 4.2.1 Input Connections 1. Prior to connecting the DC input source VIN and V5IN, it is advisable to limit the source current from VIN to 10 A and from V5IN to 1 A maximum. Make sure VIN and V5IN are initially set to 0 V and connected as shown in Figure 4-2. 2. Connect a voltmeter V1 at TP5 (VIN) and TP6 (VIN_GND) to measure the input voltage. 3. Connect a current meter A1 to measure the input current. 4. Connect a voltmeter V2 at TP1 (V5IN) and TP2 (V5IN_GND) to measure the 5-V input voltage. 5. Connect a pulse generator to input 2-bit VID signal for dynamic VOUT control. Make sure CH1 outputs 250-Hz, 3.3-VP-P pulse and CH2 outputs 125-Hz, 3.3-VP-P pulse synchronized with CH1. It is advisable to set transition time of the leading and trailing edge between 100 ns and 500 ns. 4.2.2 Output Connections 1. Connect the load to J4 (VOUT) and J5 (VOUT_GND) and set load to constant resistance mode to sink 0 ADC before VIN is applied. 2. Connect a voltmeter V3 at TP7 (VOUT) and TP8 (VOUT_GND) to measure the output voltage. 4.2.3 Other Connections Place a fan as shown in Figure 4-2 and turn it on, making sure air is flowing across the EVM. 4.3 List of Test Points Table 4-1. Test Point Functions TEST POINTS 6 NAME DESCRIPTION TP1 V5IN 5-V supply TP2 V5IN_GND GND for 5-V supply TP3 PGOOD Power good TP4 SW Switch node TP5 VIN VIN supply TP6 VIN_GND GND for VIN supply TP7 VOUT VOUT TP8 VOUT_GND GND for VOUT TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback www.ti.com Test Procedure 5 Test Procedure 5.1 Line/Load Regulation and Efficiency Measurement Procedure 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Ensure that the load is set to constant resistance mode and to sink 0 ADC. Ensure that the SW1 switch on the EVM is at the OFF position before VIN and V5IN are applied. Increase VIN from 0 V to 8 V using V1 to measure input voltage. Increase V5IN from 0 V to 5 using V2 to measure input voltage. Turn the SW1 switch to the ON position to enable the controller. Input 0 V or 3.3 V (DC) to VID0 and VID1 to select VOUT among 0.9 V, 1.0 V, 1.1 V, and 1.2 V. Vary the load from between 0 ADC to 20 ADC. VOUT should remain in load regulation. Vary VIN from between 8 V and 20 V. VOUT should remain in line regulation. Decrease the load to 0 A. Input 0 V to VID0 and VID1. Turn the SW1 switch to the OFF position to disable the controller. Decrease V5IN to 0 V. Decrease VIN to 0 V. 5.2 Dynamic Output Voltage Transition Measurement Procedure 1. 2. 3. 4. 5. 6. 7. Follow steps 1 to 5 of Section 5.1. Ensure pulse configuration is return-to-zero (RZ) with 50% duty ratio. Run the pulse generator. VOUT steps down from 1.2 V to 0.9 V as shown in Figure 6-14. Stop the pulse generator. Change the configuration as inverted. Run the pulse generator again. VOUT steps up from 0.9 V to 1.2 V as shown in Figure 6-15. Stop the pulse generator. Follow steps 11 to 13 of Section 5.1. 5.3 Equipment Shutdown 1. 2. 3. 4. 5. Shut down the load. Shut down the pulse generator. Shut down V5IN. Shut down VIN. Shut down the fan. SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 7 Performance and Typical Characteristic Curves www.ti.com 6 Performance and Typical Characteristic Curves Figure 6-1 through Figure 6-15 present typical performance curves for the TPS51217EVM-533. 6.1 Efficiency 100 100 Auto-Skip VOUT = 0.9 V 90 90 80 80 VIN = 8 V VIN = 8 V 70 70 VIN = 12 V 60 VIN = 20 V 50 VIN = 12 V h - Efficiency - % h - Efficiency - % Auto-Skip VOUT = 1.2 V 40 60 50 40 30 30 20 20 10 10 0 0.001 0.01 0.1 1 10 IOUT - Output Current - A VIN = 20 V 0 0.001 100 Figure 6-1. Efficiency at 0.9-V Output 0.01 0.1 1 10 IOUT - Output Current - A 100 Figure 6-2. Efficiency at 1.2-V Output 6.2 Load Regulation 1.25 0.95 0.94 VOUT = 0.9 V 1.24 0.93 VOUT – Output Voltage – V VOUT – Output Voltage – V 1.23 VIN = 20 V 0.92 VIN = 20 V 1.22 0.91 1.21 0.90 1.20 0.89 1.19 VIN = 8 V 0.88 1.17 0.86 1.16 0.01 0.1 1 10 VIN = 8 V 1.18 VIN = 12 V 0.87 0.85 0.001 VOUT = 1.2 V 100 1.15 0.001 0.01 IOUT – Output Current – A Figure 6-3. Load Regulation at 0.9-V Output 8 0.1 1 VIN = 12 V 10 100 IOUT – Output Current – A Figure 6-4. Load Regulation at 1.2-V Output TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback www.ti.com Performance and Typical Characteristic Curves 6.3 Line Regulation 1.25 0.95 VOUT = 0.9 V 0.94 VOUT = 1.2 V 1.24 1.23 0.92 VOUT – Output Voltage – V VOUT – Output Voltage – V 0.93 IOUT = 20 A 1.22 IOUT = 20 A 1.21 0.91 1.20 0.90 1.19 0.89 0.88 1.18 IOUT = 0 A IOUT = 0 A 0.87 1.17 0.86 1.16 1.15 0.85 6 8 10 12 14 16 18 20 6 22 8 10 12 14 16 18 20 22 VIN – Input Voltage – V VIN – Input Voltage – V Figure 6-5. Line Regulation at 0.9-V Output Figure 6-6. Line Regulation at 1.2-V Output 6.4 Transient Response Auto-Skip VIN = 20 V, IOUT = 1 A-15 A(3A/ms) VOUT (50 mV/div) IIND (10 A/div) IOUT (10 A/div) t - Time - 100 ms/div Figure 6-7. Load Transient 0.9-V Output SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 9 Performance and Typical Characteristic Curves www.ti.com 6.5 Output Ripple V IN = 12 V V OUT = 1.2 V IOUT = 20 A VIN = 12 V VOUT = 0.9 V IOUT = 20 A Figure 6-8. Output Ripple at 0.9-V Output Figure 6-9. Output Ripple at 1.2-V Output 6.6 Switch-Node Voltage VIN = 20 V VOUT = 0.9 V IOUT = 20 A Figure 6-10. Switching Node Waveform 10 TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback www.ti.com Performance and Typical Characteristic Curves 6.7 Start and Stop Auto-Skip VIN = 12 V IOUT = 20 A EN (5 V/div) EN (5 V/div) Auto-Skip VIN = 12 V, IOUT = 0 A VOUT (0.5 V/div) VOUT (0.5 V/div) PGOOD (5 V/div) PGOOD (5 V/div) DRVL (5 V/div) t – Time – 500 ms/div t - Time - 10 ms/div Figure 6-11. Enable Turn-On Waveform at 0.9-V Output Figure 6-12. Enable Turn-Off Waveform at 0.9-V Output Auto-Skip VIN = 12 V, IOUT = 0 A EN (5 V/div) 0.5 V pre-biased VOUT (0.5 V/div) PGOOD (5 V/div) t - Time - 500 ms/div Figure 6-13. Pre-Bias Turn-On Waveform at 0.9-V Output SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 11 Performance and Typical Characteristic Curves www.ti.com 6.8 Dymamic Output Voltage Transitions VID1 (5 V/div) VID1 (5 V/div) VID0 (5 V/div) VID0 (5 V/div) VOUT (0.1 V/div) 1.2 V 1.2 V VOUT (0.1 V/div) 0.9 V 5V Auto-Skip VIN = 12 V IOUT = 0 A 0.9 V 5V PGOOD (5 V/div) Auto-Skip VIN = 12 V IOUT = 0 A t - Time - 1 ms/div t - Time - 1 ms/div Figure 6-14. Output Voltage Step-Down 12 PGOOD (5 V/div) Figure 6-15. Output Voltage Step-Up TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback www.ti.com EVM Assembly Drawing and PCB Layouts 7 EVM Assembly Drawing and PCB Layouts Figure 7-1 through Figure 7-6 show the design of the TPS51217EVM-533 printed circuit board. The EVM has been designed using four layers, of 2-oz. copper circuit board. Figure 7-1. Top Layer Assembly Drawing (Top View) Figure 7-2. Bottom Assembly Drawing (Bottom View) Figure 7-3. Top Copper (Top View) Figure 7-4. Internal Layer 1 (Top View) SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 13 EVM Assembly Drawing and PCB Layouts www.ti.com Figure 7-5. Internal Layer 2 (Top View) 14 Figure 7-6. Bottom Copper (Top View) TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback www.ti.com List of Materials 8 List of Materials List of materials for the TPS51217EVM. Table 8-1. List of Materials REFDES QTY DESCRIPTION MFR PART NUMBER C1 1 Capacitor, ceramic, 4.7 nF, 50 V, X7R, 5%, 0603 STD STD C2, C8 2 Capacitor, ceramic, 0.1 µF, 50 V, X7R, 10%, 0603 STD STD C3 1 Capacitor, ceramic, 1 µF, 16 V, X7R, 10%, 0603 STD STD C4, C5, C6, C7 4 Capacitor, ceramic, 10 µF, 25 V, X7R, 10%, 1210 TDK C3225X7R1E106K C9, C10, C11, C12 4 Capacitor, aluminum, 330 µF, 2 V, 12 mΩ, 20% Panasonic EEFCX0D331XR C13 1 Capacitor, ceramic, 0.01 µF, 50 V, X7R, 10%, 0603 STD STD C14 1 Capacitor, ceramic, 1 nF, 50 V, X7R, 10%, 0603 STD STD C16 1 Capacitor, ceramic, 100 pF, 50 V, CH, 5%, 0603 STD STD C17 1 Capacitor, ceramic, 51 pF, 50 V, CH, 5%, 0603 STD STD C15, C18, C19, C20 0 Not used L1 1 Inductor, power choke SMT, 17 A, 1.1 mΩ Panasonic ETQP4LR45XFC Q1 1 MOSFET, N-channel, 30 V, 35 A, 7.0 mΩ Fairchild FDMS8680 Q2, Q3 2 MOSFET, N-channel, 30 V, 42 A, 3.0 mΩ Fairchild FDMS8670AS Q5 1 MOSFET, dual, N-channel, 30 V, 100 mA Rohm EM6K1 Q4 0 Not used R1 1 Resistor, chip, 10.0 kΩ, 1/16W, 1%, 0603 STD STD R2 1 Resistor, chip, 20 kΩ, 1/16W, 1%, 0603 STD STD R3 1 Resistor, chip, 33 kΩ, 1/16W, 1%, 0603 STD STD R4 1 Resistor, chip, 100 kΩ, 1/16W, 1%, 0603 STD STD R5 1 Resistor, chip, 0 Ω 1/16W, 1%, 0603 STD STD R6 1 Resistor, chip, 1 Ω, 1/16W, 1%, 0603 STD STD R7, R8 2 Resistor, chip, 1 kΩ, 1/16W, 1%, 0603 STD STD R9 1 Resistor, chip, 820 Ω, 1/16W, 1%, 0603 STD STD R10 1 Resistor, chip, 51 kΩ, 1/16W, 1%, 0603 STD STD R11 1 Resistor, chip, 10 kΩ, 1/16W, 1%, 0603 STD STD R12 1 Resistor, chip, 30 kΩ, 1/16W, 1%, 0603 STD STD R13 1 Resistor, chip, 430 Ω, 1/16W, 1%, 0603 STD STD R14, R15, R16, R17, R18, R19 0 Not used U1 1 IC, single synchronous step-down controller TI TPS51217DSC 9 References Texas Instruments, TPS51217 High-Performance, Single-Synchronous Step-Down Controller for Notebook Power Supply data sheet 10 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (May 2010) to Revision A (February 2022) Page • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 • Updated the user's guide title............................................................................................................................. 2 SLUU420A – MAY 2010 – REVISED FEBRUARY 2022 Submit Document Feedback TPS51217 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 15 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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