TPS56221EVM-579

www.ti.com Table of Contents User’s Guide TPS56221 Step-Down Converter Evaluation Module User's Guide Table of Contents 1 Introduction.............................................................................................................................................................................3 2 Description.............................................................................................................................................................................. 4 2.1 Applications........................................................................................................................................................................4 2.2 Features............................................................................................................................................................................. 4 3 Electrical Performance Specifications................................................................................................................................. 5 4 Schematic................................................................................................................................................................................6 5 Test Setup................................................................................................................................................................................7 5.1 Test Equipment.................................................................................................................................................................. 7 5.2 Recommended Wire Gauge...............................................................................................................................................7 5.3 Equipment Set Up Procedure............................................................................................................................................ 8 6 Configurations........................................................................................................................................................................ 9 6.1 Enable Selection (J3)......................................................................................................................................................... 9 7 Test Point Descriptions........................................................................................................................................................ 10 7.1 Input Voltage Monitoring (TP1 and TP2)..........................................................................................................................10 7.2 Output Voltage Monitoring (TP3 and TP4)....................................................................................................................... 10 7.3 Enable/Soft-start Monitoring (TP5)...................................................................................................................................10 7.4 Power Good Monitoring (TP6)......................................................................................................................................... 10 7.5 Loop Response Testing (TP7, TP8, TP9 and TP10)........................................................................................................10 7.6 Switch Node Voltage Monitoring (TP11 and TP12).......................................................................................................... 10 8 Test Procedures.................................................................................................................................................................... 11 8.1 Start Up/Shut Down Procedure........................................................................................................................................ 11 8.2 Output Ripple Voltage Measurement Procedure.............................................................................................................. 11 8.3 Control Loop Gain and Phase Measurement Procedure................................................................................................. 12 8.4 Equipment Shutdown....................................................................................................................................................... 12 9 Performance Data and Typical Characteristic Curves...................................................................................................... 13 9.1 Efficiency..........................................................................................................................................................................13 9.2 Load Regulation............................................................................................................................................................... 13 9.3 Line Regulation................................................................................................................................................................ 14 9.4 Output Voltage Ripple...................................................................................................................................................... 14 9.5 Switch Node..................................................................................................................................................................... 15 9.6 Load Transient................................................................................................................................................................. 15 9.7 Start Up............................................................................................................................................................................ 16 9.8 Power Off......................................................................................................................................................................... 17 9.9 Over-Current Protection................................................................................................................................................... 17 9.10 Control Loop Bode Plot.................................................................................................................................................. 18 9.11 Thermal Image............................................................................................................................................................... 18 10 EVM Assembly Drawings and PCB Layout...................................................................................................................... 19 11 List of Materials...................................................................................................................................................................22 12 Revision History................................................................................................................................................................. 22 List of Figures Figure 4-1. TPS56221EVM-579 Schematic.................................................................................................................................6 Figure 5-1. TPS56221EVM-579 Recommended Test Setup....................................................................................................... 8 Figure 8-1. Tip and Barrel Output Voltage Ripple Measurement............................................................................................... 11 Figure 8-2. Control Loop Measurement Setup.......................................................................................................................... 12 Figure 9-1. Efficiency................................................................................................................................................................. 13 Figure 9-2. Load Regulation...................................................................................................................................................... 13 Figure 9-3. Line Regulation (VIN = 8 V to 14 V, VOUT = 1.0 V, IOUT = 25 A).......................................................................... 14 Figure 9-4. Output Voltage Ripple (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A)...........................................................................14 SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 Table of Contents www.ti.com Figure 9-5. Switch Node Waveform Measured at Pins Using Tip and Barrel Measurement Technique (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A).............................................................................................................................................................15 Figure 9-6. Load Transient (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A to 25 A)........................................................................... 15 Figure 9-7. Start-Up Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A)............................................................................... 16 Figure 9-8. Pre-Biased Start-Up Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A).............................................................. 16 Figure 9-9. Power-Off Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A)............................................................................ 17 Figure 9-10. Over-Current Protection Waveform (Ch1: VIN, Ch2: EN/SS, Ch3: VOUT, Ch4: IOUT (10 A/div), VIN = 12 V, VOUT = 1.0 V, IOUT = 36 A)..................................................................................................................................................17 Figure 9-11. Loop Gain (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A, Bandwidth: 51 kHz, Phase Margin: 48°)............................18 Figure 9-12. Thermal Image (VIN = 14 V, VOUT = 1.0 V, IOUT = 25 A, without airflow)...........................................................18 Figure 10-1. TPS56221EVM-579 Top Assembly Drawing (top view)........................................................................................ 19 Figure 10-2. TPS56221EVM-579 Bottom Assembly Drawing (bottom view).............................................................................19 Figure 10-3. TPS56221EVM-579 Top Copper (top view).......................................................................................................... 20 Figure 10-4. TPS56221EVM-579 Internal 1 (top view)..............................................................................................................20 Figure 10-5. TPS56221EVM-579 Internal 2 (top view)..............................................................................................................21 Figure 10-6. TPS56221EVM-579 Bottom Copper (top view).....................................................................................................21 List of Tables Table 3-1. TPS56221EVM-579 Electrical Performance Specifications........................................................................................5 Table 7-1. Test Point Descriptions............................................................................................................................................. 10 Table 11-1. TPS56221EVM-579 List of Materials...................................................................................................................... 22 2 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Introduction 1 Introduction The TPS56221EVM-579 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.0-V output at up to 25 A from a 12-V input bus. The EVM is designed to start up from a single supply; so, no additional bias voltage is required for start up. The module uses the TPS56221 High-Current Synchronous Buck Converter with integrated MOSFETs. The TPS56221 integrates TI’s high performance controller technology with TI’s industry leading MOSFET technology in a standard QFN package to meet the demands of modern, high-current, and space constrained applications. SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 Description www.ti.com 2 Description TPS56221EVM-579 is designed to use a regulated 12-V (8-V to 14-V) bus voltage to provide a regulated 1.0-V output at up to 25 A of load current. TPS56221EVM-579 is designed to demonstrate the TPS56221 high-current integrated FET converter in a typical space-limited, 12-V bus to low-voltage point-of-load application. 2.1 Applications • • • • High-Current, Low-Voltage FPGA or Micro Controller Core Supplies High-Current Point-of-Load Modules Telecommunications Equipment Computer Peripherals 2.2 Features • • • • • • 4 8-V to 14-V Input Voltage Rating 1.0-V ±2% Output Voltage Rating 25-A Steady-State Load Current 500-kHz Switching Frequency Simple Access to Power Good, Enable/Soft-Start and Error Amplifier Convenient Converter Performance Test Points TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Electrical Performance Specifications 3 Electrical Performance Specifications Table 3-1. TPS56221EVM-579 Electrical Performance Specifications PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Input Characteristics VIN Input voltage IIN Input current VIN = 12 V, IOUT = 25 A No load input current VIN = 12 V, IOUT = 0 A 43 mA IOUT = 25 A 4.2 V VIN_UVLO Input UVLO 8 12 14 V 2.42 A Output Characteristic VOUT VRIPPLE IOUT Output voltage VIN = 8 V to 14 V, IOUT = 0 A to 25 A Line regulation VIN = 8 V to 14 V, IOUT = 25 A 0.98 0.1% 1.0 Load regulation VIN = 12 V, IOUT = 0 A to 25 A 1% Output voltage ripple VIN = 12 V, IOUT = 25 A Output current VIN = 8 V to 14 V 1.02 20 0 V mVPP 25 A 550 kHz Systems Characteristics fSW Switching frequency ηpk Peak efficiency VIN = 12 V, IOUT = 13 A 89.6% Full-load efficiency VIN = 12 V, IOUT = 25 A 87.1% η 450 Operating temperature SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback 500 25 °C TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 5 Schematic www.ti.com + 4 Schematic Figure 4-1. TPS56221EVM-579 Schematic 6 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Test Setup 5 Test Setup 5.1 Test Equipment 5.1.1 Voltage Source VIN: The input voltage source (VIN) shall be a 0-V to 15-V variable DC source capable of supplying 4 ADC. 5.1.2 Meters • • • A1: Input current meter (0 ADC to 4 ADC). V1: Input voltage meter (0 V to 15 V). V2: Output voltage meter (0 V to 2 V). 5.1.3 Load LOAD: Output load. Electronic load set for constant current or constant resistance mode, capable of 0 ADC to 25 ADC at 1.0 VDC. 5.1.4 Oscilloscope For Output Voltage Ripple: Oscilloscope shall be an analog or digital oscilloscope set for AC coupled measurement with 20-MHz bandwidth limiting. Use 20-mV/div vertical resolution, 1.0-µs/div horizontal resolution. For Switching Waveforms: Oscilloscope shall be an analog or digital Oscilloscope set for DC coupled measurement with 20-MHz bandwidth limiting. Use 2-V/div or 5-V/div vertical resolution and 1.0-µs/division horizontal resolution. 5.1.5 Fan The TPS56221EVM-579 Evaluation Module includes components that can get hot to touch when operating. Because this evaluation module is not enclosed to allow probing of circuit nodes, a small fan capable of 200 lfm to 400 lfm is recommended to reduce component temperatures when operating. 5.2 Recommended Wire Gauge 5.2.1 VIN to J1 The connection between the source voltage (VIN) and J1 of TPS56221EVM-579 can carry as much as 4 ADC of current. The minimum recommended wire size is AWG #16 with the total length of wire less than 2 feet (1 foot input, 1 foot return) 5.2.2 J2 to LOAD The connection between the LOAD and J2 of TPS56221EVM-579 can carry as much as 25 ADC of current. The minimum recommended wire size is 2xAWG #14 with the total length of wire less than 2 feet (1 foot input, 1 foot return). Note J2 is a 4 position terminal jack using positions for each VOUT and GND. Each position is rated to support 15 A of output current. When delivering more than 15 A of current, both VOUT and both GND positions should be used. SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 7 Test Setup www.ti.com 5.3 Equipment Set Up Procedure Figure 5-1 is the recommended test setup to evaluate the TPS56221EVM-579. FAN V1 + + A1 DC source V IN V2 + LOAD 1.0V @ 25A + TEXAS I NSTRUMENTS Figure 5-1. TPS56221EVM-579 Recommended Test Setup 1. Working at an ESD workstation, make sure that any wrist straps, bootstraps and mats are connected referencing the user to earth ground before power is applied to the EVM. Wearing electrostatic smock and safety glasses is also recommended. 2. Prior to connecting the DC input source, VIN, it is advisable to limit the source current from VIN to 4.0 A maximum. Make sure VIN is initially set to 0 V and connected as shown in Figure 5-1. 3. Connect VIN to J1 as shown in Figure 5-1. 4. Connect ammeter A1 between VIN and J1 as shown in Figure 5-1. 5. Connect voltmeter V1 to TP1 and TP2 as shown in Figure 5-1. 6. Connect voltmeter V2 to TP3 and TP4 as shown in Figure 5-1. 7. Place the fan as shown in Figure 5-1 and turn it on, ensuring that the air blows directly across the evaluation module. 8 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Configurations 6 Configurations 6.1 Enable Selection (J3) The converter can be enabled and disabled by J3. Shorting J3 discharges the soft-start capacitor and disables the TPS56221 converter. Opening J3 enables the TPS56221 converter. Default setting: short to disable the converter. SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 9 Test Point Descriptions www.ti.com 7 Test Point Descriptions Table 7-1. Test Point Descriptions TEST POINT LABEL DESCRIPTION TP1 VIN Measurement test point for input voltage TP2 GND Ground test point for input voltage TP3 VOUT Measurement test point for output voltage TP4 GND Ground test point for output voltage TP5 EN/SS TP6 PGOOD Measurement test point for enable/soft-start Measurement test point for power good TP7 CHA TP8 SGND Measurement test point for channel A of loop response Ground test point for channel A of loop response TP9 SGND Ground test point for channel B of loop response TP10 CHB Measurement test point for channel B of loop response TP11 SW Measurement test point for switch node voltage TP12 GND Ground test point for switch node voltage 7.1 Input Voltage Monitoring (TP1 and TP2) TPS56221EVM-579 provides two test points for measuring the input voltage applied to the module. This allows the user to measure the actual input module voltage without losses from input cables and connectors. To use TP1 and TP2, connect a voltmeter positive input terminal to TP1 and negative input terminal to TP2. 7.2 Output Voltage Monitoring (TP3 and TP4) TPS56221EVM-579 provides two test points for measuring the output voltage generated by the module. To use TP3 and TP4, connect a voltmeter positive input terminal to TP3 and negative input terminal to TP4. For output ripple monitoring, please refer to the tip and barrel measurement technique in Section 8.2. 7.3 Enable/Soft-start Monitoring (TP5) TPS56221EVM-579 provides a test point for measuring the enable/soft-start voltage of the TPS56221 converter. This test point can be monitored to observe the start-up calibration waveform, soft-start ramp or fault time-out timing. The enable/soft-start test point should not be actively driven from an external circuit, such as a logic output of another power supply. 7.4 Power Good Monitoring (TP6) TPS56221EVM-579 provides a test points for measuring the Power Good voltage of the TPS56221 converter. 7.5 Loop Response Testing (TP7, TP8, TP9 and TP10) TPS56221EVM-579 provides four test points (two signals and two grounds) for measuring the control loop frequency response. This allows the user to measure the actual module loop response without modifying the evaluation board. See Section 8.3 for additional detail. 7.6 Switch Node Voltage Monitoring (TP11 and TP12) TPS56221EVM-579 provides two test points for measuring the switch node. To monitor the switch node voltage, set oscilloscope per Oscilloscope For Switching Waveforms in Section 5.1.4. Connect the oscilloscope probe to TP11 and the ground lead of the probe to TP12. To monitor the voltage spike on switch node, please remove the bandwidth limit on the oscilloscope and refer to the Application Report SLPA005 (Reducing Ringing Through PCB Layout Techniques) for the measurement techniques. 10 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Test Procedures 8 Test Procedures 8.1 Start Up/Shut Down Procedure 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Set up the EVM as described in Section 5.3 and Figure 5-1. Ensure LOAD is set to sink 0 ADC. Ensure jumper J3 set per Section 6.1. Increase VIN from 0 VDC to 12 VDC. Using V1 to measure VIN voltage. Open jumper J3 to enable the converter. Use V2 to measure VOUT voltage, A1 to measure VIN voltage. Vary LOAD from 0 ADC to 25 ADC, VOUT should remain in load regulation. Vary VIN from 8 V to 14 V, VOUT should remain in line regulation. Short jumper J3 to disable the converter. Decrease VIN to 0 V. Decrease LOAD to 0 A. 8.2 Output Ripple Voltage Measurement Procedure 1. Follow Section 8.1 to set VIN and LOAD to desired operating condition. 2. Set oscilloscope for Output Voltage Ripple Measurement in Section 5.1.4. 3. Connect oscilloscope probe with exposed metal barrel to TP3 and TP4 per Figure 8-1. Using a leaded ground connection may induce additional noise due to the large ground loop. 4. Follow Section 8.1 to power down. Metal Ground Barrel Probe Tip TP3 TP4 Tip and Barrel V OUT ripple measurement Figure 8-1. Tip and Barrel Output Voltage Ripple Measurement SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 11 Test Procedures www.ti.com 8.3 Control Loop Gain and Phase Measurement Procedure 1. 2. 3. 4. 5. 6. 7. Follow Section 8.1 to set VIN and LOAD to desired operating condition. Connect isolation transformer to test points TP7 and TP10 as shown in Figure 8-2. Connect input signal amplitude measurement probe (Channel A) to TP7 as shown in Figure 8-2. Connect output signal amplitude measurement probe (Channel B) to TP10 as shown in Figure 8-2. Connect ground lead of Channel A and Channel B to TP8 and TP9 as shown in Figure 8-2, respectively. Inject 10 mV or less signal through the isolation transformer. Sweep the frequency from 500 Hz to 500 kHz with 10-Hz or lower post filter. æ ChannelB ö 20 ´ log ç ÷ è ChannelA ø . 8. Control loop gain can be measured by 9. Control loop phase can be measured by the phase difference between Channel A and Channel B. 10. Follow Section Section 8.1 to power down. Network Analyzer FAN CHA CHB Output V1 + + A1 DC source VIN - Isolation Transformer V2 + LOAD 1.0V @ 25A + TEXAS I NSTRUMENTS Figure 8-2. Control Loop Measurement Setup 8.4 Equipment Shutdown 1. 2. 3. 4. 12 Shut down VIN. Shut down LOAD. Shut down fan. Shut down oscilloscope. TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Performance Data and Typical Characteristic Curves 9 Performance Data and Typical Characteristic Curves Figure 9-1 through Figure 9-12 present typical performance curves for the TPS56221EVM-579. Since actual performance data can be affected by measurement techniques and environmental variables, these curves are presented for reference and may differ from actual field measurements. 9.1 Efficiency 95 90 - Efficiency - % 85 80 75 70 65 VIN = 8 V 60 VIN = 12 V VIN = 14 V 55 50 0 5 10 15 20 25 ILOAD - Load Current - A Figure 9-1. Efficiency 9.2 Load Regulation 1.02 VOUT - Output Voltage - V 1.015 1.01 1.005 1 0.995 VIN = 8 V 0.99 VIN = 12 V 0.985 VIN = 14 V 0.98 0 5 10 15 20 25 ILOAD - Load Current - A Figure 9-2. Load Regulation SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 13 Performance Data and Typical Characteristic Curves www.ti.com 9.3 Line Regulation 1.02 VOUT - Output Voltage - V 1.015 1.01 1.005 1 0.995 0.99 0.985 0.98 8 9 10 11 12 13 14 VIN - Input Voltage - V Figure 9-3. Line Regulation (VIN = 8 V to 14 V, VOUT = 1.0 V, IOUT = 25 A) 9.4 Output Voltage Ripple Figure 9-4. Output Voltage Ripple (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A) 14 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Performance Data and Typical Characteristic Curves 9.5 Switch Node Figure 9-5. Switch Node Waveform Measured at Pins Using Tip and Barrel Measurement Technique (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A) 9.6 Load Transient Figure 9-6. Load Transient (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A to 25 A) SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 15 Performance Data and Typical Characteristic Curves www.ti.com 9.7 Start Up Figure 9-7. Start-Up Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A) Figure 9-8. Pre-Biased Start-Up Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 0 A) 16 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com Performance Data and Typical Characteristic Curves 9.8 Power Off Figure 9-9. Power-Off Waveform (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A) 9.9 Over-Current Protection Figure 9-10. Over-Current Protection Waveform (Ch1: VIN, Ch2: EN/SS, Ch3: VOUT, Ch4: IOUT (10 A/div), VIN = 12 V, VOUT = 1.0 V, IOUT = 36 A) SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 17 Performance Data and Typical Characteristic Curves www.ti.com 9.10 Control Loop Bode Plot Figure 9-11. Loop Gain (VIN = 12 V, VOUT = 1.0 V, IOUT = 25 A, Bandwidth: 51 kHz, Phase Margin: 48°) 9.11 Thermal Image Figure 9-12. Thermal Image (VIN = 14 V, VOUT = 1.0 V, IOUT = 25 A, without airflow) 18 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com EVM Assembly Drawings and PCB Layout 10 EVM Assembly Drawings and PCB Layout The following figures (Figure 10-1 through Figure 10-6) show the design of the TPS56221EVM-579 printed circuit board. The EVM has been designed using a 4-layer, 2-oz copper-clad circuit board 2.5” x 2.5” with components on both sides of the PCB to allow the user to view, probe and evaluate the TPS56221 high current converter with integrated FETs in a small form factor, high-current application. TEXAS I NSTRUMENTS Figure 10-1. TPS56221EVM-579 Top Assembly Drawing (top view) Figure 10-2. TPS56221EVM-579 Bottom Assembly Drawing (bottom view) SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 19 EVM Assembly Drawings and PCB Layout www.ti.com Figure 10-3. TPS56221EVM-579 Top Copper (top view) Figure 10-4. TPS56221EVM-579 Internal 1 (top view) 20 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback www.ti.com EVM Assembly Drawings and PCB Layout Figure 10-5. TPS56221EVM-579 Internal 2 (top view) Figure 10-6. TPS56221EVM-579 Bottom Copper (top view) SLVU446B – MARCH 2011 – REVISED JULY 2021 Submit Document Feedback TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 21 List of Materials www.ti.com 11 List of Materials Table 11-1. TPS56221EVM-579 List of Materials QTY REF DES DESCRIPTION PART NUMBER MFR 4 C1, C2, C3, C4 Capacitor, ceramic, 25 V, X5R, 20%, 22 µF, 1210 Std Std 2 C5, C11 Capacitor, ceramic, 25 V, X5R, 20%, 1.0 µF, 0805 Std Std 0 C6 Capacitor, aluminum, 16 VDC, ±20%, 100 µF, code D8 EEEFP1C101AP Panasonic 5 C7, C8, C9, C10, C19 Capacitor, ceramic, 6.3 V, X5R, 20%, 100 µF, 1210 Std Std 1 C12 Capacitor, ceramic, 10 V, X5R, 20%, 4.7 µF, 0805 Std Std 1 C13 Capacitor, ceramic, 16 V, X7R, 20%, 33 nF, 0603 Std Std 1 C14 Capacitor, ceramic, 50 V, X7R, 20%, 100 nF, 0603 Std Std 2 C15, C18 Capacitor, ceramic, 50 V, X7R, 10%, 2200 pF, 0603 Std Std 1 C16 Capacitor, ceramic, 50 V, C0G, 5%, 100 pF, 0603 Std Std 1 C17 Capacitor, ceramic, 50 V, C0G, 5%, 680 pF, 0603 Std Std 0 C20, C21 Capacitor, ceramic, 6.3 V, X5R, 20%, 100 µF, 1210 Std Std 2 J1, J2 Terminal block, 4 pin, 15 A, 5.1 mm, 0.80 inch x 0.35 inch ED120/4DS OST 1 J3 Header, male 2 pin, 100-mil spacing, 0.100 inch x 2 inch PEC02SAAN Sullins 1 L1 Inductor, 0.32 mΩ, 320 nH, 0.530 inch x 0.510 inch PA0513.321NLT Pulse 1 R1 Resistor, chip, 1/16 W, 1%, 2.87 kΩ, 0603 Std Std 1 R2 Resistor, chip, 1/16 W, 1%, 5.10 Ω, 0603 Std Std 1 R3 Resistor, chip, 1/16 W, 1%, 7.87 kΩ, 0603 Std Std 1 R4 Resistor, chip, 1/16 W, 1%, 20.5 kΩ, 0603 Std Std 1 R5 Resistor, chip, 1/16 W, 1%, 49.9 Ω, 0603 Std Std 1 R6 Resistor, chip, 1/16 W, 1%, 1.00 kΩ, 0603 Std Std 1 R7 Resistor, chip, 1/16 W, 1%, 30.1 kΩ, 0603 Std Std 1 R8 Resistor, chip, 1/16 W, 1%, 0 kΩ, 0603 Std Std 1 R9 Resistor, chip, 1/8 W, 1%, 1.00 Ω, 0805 Std Std 1 R10 Resistor, chip, 1/16 W, 1%, 100 kΩ, 0603 Std Std 3 TP1, TP3, TP11 Test point, red, thru hole, 0.125 inch x 0.125 inch 5010 Keystone 5 TP2, TP4, TP8, TP9, TP12 Test point, black, thru hole, 0.125 inch x 0.125 inch 5011 Keystone 2 TP5, TP6 Test point, yellow, thru hole, 0.125 x 0.125 inch 5014 Keystone 2 TP7, TP10 Test point, white, thru hole, 0.125 x 0.125 inch 5012 Keystone 1 U1 4.5-V to 14-V Input 25-A Synchronous Buck Converter, QFN-22 6 mm x 5 mm TPS56221DQP TI 1 -- PCB, 2.5 inch x 2.5 inch x 0.062 inch HPA579 Any 1 -- Shunt, 100 mil, black, 0.100 929950-00 3M 12 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (March 2011) to Revision B (July 2021) Page • Updated user's guide title................................................................................................................................... 3 • Updated the numbering format for tables, figures, and cross-references throughout the document. ................3 22 TPS56221 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU446B – MARCH 2011 – REVISED JULY 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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