TPS54332EVM-416

www.ti.com Table of Contents User’s Guide TPS54332 Step-Down Converter Evaluation Module User's Guide Table of Contents 1 Introduction.............................................................................................................................................................................2 1.1 Background........................................................................................................................................................................ 2 1.2 Performance Specification Summary.................................................................................................................................2 1.3 Modifications...................................................................................................................................................................... 3 2 Test Setup and Results.......................................................................................................................................................... 4 2.1 Input and Output Connections........................................................................................................................................... 4 2.2 Efficiency............................................................................................................................................................................4 2.3 Output Voltage Load Regulation........................................................................................................................................ 5 2.4 Output Voltage Line Regulation......................................................................................................................................... 7 2.5 Load Transients..................................................................................................................................................................7 2.6 Loop Characteristics.......................................................................................................................................................... 8 2.7 Output Voltage Ripple........................................................................................................................................................ 8 2.8 Input Voltage Ripple........................................................................................................................................................... 9 2.9 Powering Up.......................................................................................................................................................................9 2.10 Eco-mode Operation...................................................................................................................................................... 10 3 Board Layout......................................................................................................................................................................... 11 3.1 Layout...............................................................................................................................................................................11 3.2 Estimated Circuit Area..................................................................................................................................................... 12 4 Schematic and Bill of Materials...........................................................................................................................................13 4.1 Schematic........................................................................................................................................................................ 13 4.2 Bill of Materials.................................................................................................................................................................14 5 Revision History................................................................................................................................................................... 14 List of Figures Figure 2-1. TPS54332EVM-416 Efficiency.................................................................................................................................. 5 Figure 2-2. TPS54332EVM-416 Low Current Efficiency..............................................................................................................5 Figure 2-3. TPS54332EVM-416 Load Regulation....................................................................................................................... 6 Figure 2-4. TPS54332EVM-416 Line Regulation........................................................................................................................ 7 Figure 2-5. TPS54332EVM-416 Transient Response................................................................................................................. 7 Figure 2-6. TPS54332EVM-416 Loop Response........................................................................................................................ 8 Figure 2-7. TPS54332EVM-416 Output Ripple........................................................................................................................... 8 Figure 2-8. TPS54332EVM-416 Input Ripple.............................................................................................................................. 9 Figure 2-9. TPS54332EVM-416 Start-Up Relative to VIN ........................................................................................................... 9 Figure 2-10. TPS54332EVM-416 Eco-mode Operation............................................................................................................ 10 Figure 3-1. TPS54332EVM-416 Top-Side Layout......................................................................................................................11 Figure 3-2. TPS54332EVM-416 Bottom-Side Layout................................................................................................................12 Figure 3-3. TPS54332EVM-416 Top-Side Assembly.................................................................................................................12 Figure 4-1. TPS54332EVM-416 Schematic...............................................................................................................................13 List of Tables Table 1-1. Input Voltage and Output Current Summary...............................................................................................................2 Table 1-2. TPS54332EVM-416 Performance Specification Summary.........................................................................................2 Table 1-3. Output Voltages Available...........................................................................................................................................3 Table 2-1. EVM Connectors and Test Points............................................................................................................................... 4 Table 4-1. TPS54332EVM-416 Bill of Materials.........................................................................................................................14 Trademarks All trademarks are the property of their respective owners. SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 TPS54332 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 1 Introduction www.ti.com 1 Introduction This user's guide contains background information for the TPS54332 as well as support documentation for the TPS54332EVM-416 evaluation module (HPA416). This document also includes the performance specifications, the schematic, and the bill of materials for the TPS54332EVM-416. 1.1 Background The TPS54332 DC/DC converter is designed to provide up to a 3.5-A output from an input voltage source of 3.5 V to 28 V. Table 1-1 provides the rated input voltage and output current range. This evaluation module is designed to demonstrate the small printed-circuit-board areas that can be achieved when designing with the TPS54332 regulator. The switching frequency is internally set at a nominal 1000 kHz. The high-side MOSFET is incorporated inside the TPS54332 package along with the gate drive circuitry. The low drain-to-source on resistance of the MOSFET allows the TPS54332 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The compensation components are external to the integrated circuit (IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54332 provides adjustable slow start and undervoltage lockout inputs. The absolute maximum input voltage is 30 V for the TPS54332EVM-416. Table 1-1. Input Voltage and Output Current Summary EVM Input Voltage Range Output Current Range TPS54332EVM-416 VIN = 5 V to 15 V 0 A to 3.5 A 1.2 Performance Specification Summary Table 1-2 provides a summary of the TPS54332EVM-416 performance specifications. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 2.5 V, unless otherwise specified. The TPS54332EVM-416 is designed and tested for VIN = 7 V to 28 V. The ambient temperature is 25°C for all measurements, unless otherwise noted. Table 1-2. TPS54332EVM-416 Performance Specification Summary Specification Test Conditions VIN voltage range MIN 5 Output voltage set point MAX 12 15 2.5 Output current range VIN = 5 V to 15 V Line regulation IO = 1 A, VIN = 5 V to 15 V ±0.16% Load regulation VIN = 12 V, IO = 0.2 A to 3.5 A ±0.10% IO = 0.75 A to 2.5 A Load transient response IO = 2.5 A to 0.75 A 0 Unit V V 3.5 A Voltage change –10 Recovery time 400 μs Voltage change 10 mV mV Recovery time 400 μs 42 kHz Loop bandwidth VIN = 12 V, IO = 3.5 A Phase margin VIN = 12 V, IO = 3.5 A 45 ° Input ripple voltage IO = 3.5 A 110 mVpp Output ripple voltage IO = 3.5 A 10 mVpp 6 ms 1000 kHz Output rise time Operating frequency Maximum efficiency 2 TYP TPS54332EVM-416, VIN = 5 V, IO = 0.5 A TPS54332 Step-Down Converter Evaluation Module User's Guide 89% SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Introduction 1.3 Modifications These evaluation modules are designed to provide access to the features of the TPS54332. Some modifications can be made to this module. 1.3.1 Output Voltage Set Point To change the output voltage of the EVM, change the value of resistor R6. Changing the value of R6 can change the output voltage above 0.8 V. The value of R6 for a specific output voltage can be calculated using Equation 1. R 6 = 10.2 k W ´ 0.8 V VOUT - 0.8 V (1) Table 1-3 lists the R6 values for some common output voltages. Note that VIN must be in a range so that the minimum on time is greater than 130 ns, and the maximum duty cycle is less than 91%. The values given in Table 1-3 are standard values, not the exact value calculated using Equation 1. Changing the output voltage from 2.5 V effectively changes the output impedance, which affects the loop response. It can be necessary to modify the compensation component values. See the TPS54332 3-A, 28-V Input Step-Down DC/DC Converter with Eco-mode data sheet for details. Table 1-3. Output Voltages Available Output Voltage (V) R6 Value (kΩ) 1.8 8.25 2.5 4.75 3.3 3.24 5 1.96 SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 TPS54332 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 3 Test Setup and Results www.ti.com 2 Test Setup and Results This section describes how to properly connect, set up, and use the TPS54332EVM-416 evaluation module. The section also includes test results typical for the evaluation module and covers the following: • • • • • • • Efficiency Output voltage regulation Load transients Loop response Output ripple Input ripple Start-up 2.1 Input and Output Connections The TPS54332EVM-416 is provided with input and output connectors and test points as shown in Table 2-1. A power supply capable of supplying 3 A must be connected to J1 through a pair of 20 AWG wires. The load must be connected to J4 through a pair of 20 AWG wires. The maximum load current capability must be 3.5 A. Wire lengths must be minimized to reduce losses in the wires. Test point TP1 provides a place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP5 is used to monitor the output voltage with TP6 as the ground reference. Table 2-1. EVM Connectors and Test Points Reference Designator Function J1 VIN (see Table 1-1 for VIN range) J2 2-pin header for enable. Connect EN to ground to disable, open to enable. J3 2-pin header for slow start monitor and GND J4 VOUT, 2.5 V at 3.5 A maximum TP1 VIN test point at VIN connector TP2 GND test point at VIN TP3 PH test point TP4 Test point between voltage divider network and output. Used for loop response measurements. TP5 Output voltage test point at OUT connector TP6 GND test point at OUT connector 2.2 Efficiency The efficiency of this EVM peaks at a load current of about 0.5 A and 5-V input, then decreases as the load current increases towards full load. Figure 2-1 shows the efficiency for the TPS54332EVM-416 at an ambient temperature of 25°C. 4 TPS54332 Step-Down Converter Evaluation Module User's Guide SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Test Setup and Results 100 VO = 2.5 V 95 VI = 5 V 90 VI = 12 V Efficiency - % 85 80 75 VI = 15 V 70 65 60 0 0.5 1 1.5 2 IO - Output Current - A 2.5 3 3.5 Figure 2-1. TPS54332EVM-416 Efficiency Figure 2-2 shows the efficiency for the TPS54332EVM-416 at lower output currents between 0.025 A and 0.250 A at an ambient temperature of 25°C. 100 VO = 2.5 V 95 VI = 5 V 90 85 VI = 12 V Efficiency - % VI = 15 V 80 75 70 65 60 55 50 0 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225 0.25 IO - Output Current - A Figure 2-2. TPS54332EVM-416 Low Current Efficiency The efficiency can be lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the internal MOSFET. 2.3 Output Voltage Load Regulation Figure 2-3 shows the load regulation for the TPS54332EVM-416. SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 TPS54332 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 5 Test Setup and Results www.ti.com 1 0.9 Output Voltage Regulation - % 0.8 VI = 15 V 0.7 0.6 VI = 12 V 0.5 0.4 VI = 5 V 0.3 0.2 0.1 0 -0.1 0 0.5 1 1.5 2 2.5 3 3.5 IO - Output Current - A Figure 2-3. TPS54332EVM-416 Load Regulation Measurements are given for an ambient temperature of 25°C. 6 TPS54332 Step-Down Converter Evaluation Module User's Guide SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Test Setup and Results 2.4 Output Voltage Line Regulation Figure 2-4 shows the line regulation for the TPS54332EVM-416. 0.025 0.02 0.015 Output Regulation - % 0.01 0.005 IO = 1 A 0 -0.005 -0.01 -0.015 -0.02 -0.025 5 6 7 8 9 10 11 12 13 14 15 VI - Input Voltage - V Figure 2-4. TPS54332EVM-416 Line Regulation 2.5 Load Transients Figure 2-5 shows the TPS54332EVM-416 response to load transients. The current step is from 0.75 A to 2.5 A at 12-V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. VOUT 10 mV/div IOUT 0.75 to 2.5 A Step t - Time - 500 ms/div Figure 2-5. TPS54332EVM-416 Transient Response SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 TPS54332 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 7 Test Setup and Results www.ti.com 2.6 Loop Characteristics Figure 2-6 shows the TPS54332EVM-416 loop response characteristics. Gain and phase plots are shown for VIN voltage of 12 V. Load current for the measurement is 3.5 A. 60 180 50 150 30 Gain - dB 120 Gain 90 Phase 20 60 10 30 0 0 -10 -30 -20 -60 -30 -90 -40 -120 -50 -150 -60 10 100 1k 10k f - Frequency - Hz 100k Phase - deg 40 -180 1M Figure 2-6. TPS54332EVM-416 Loop Response 2.7 Output Voltage Ripple Figure 2-7 shows the TPS54332EVM-416 output voltage ripple. The output current is the rated full load of 3.5 A and VIN = 12 V. The ripple voltage is measured directly across the output capacitors. 20 mV/div VOUT PH 5 V/div t - Time - 1 ms/div Figure 2-7. TPS54332EVM-416 Output Ripple 8 TPS54332 Step-Down Converter Evaluation Module User's Guide SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Test Setup and Results 2.8 Input Voltage Ripple Figure 2-8 shows the TPS54332EVM-416 input voltage ripple. The output current is the rated full load of 3.5 A and VIN = 12 V. The ripple voltage is measured directly across the input capacitors. VIN PH 100 mV/div 5 V/div t - Time - 1 ms/div Figure 2-8. TPS54332EVM-416 Input Ripple 2.9 Powering Up Figure 2-9 shows the start-up waveform. The top trace shows VOUT and the bottom trace shows VIN. The input voltage is 12 V and there is no load. VOUT 1 V/div VIN 5 V/div t - Time - 2 ms/div Figure 2-9. TPS54332EVM-416 Start-Up Relative to VIN SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 TPS54332 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 9 Test Setup and Results www.ti.com 2.10 Eco-mode Operation At light load currents, the TPS54332 is designed to operate in pulse skipping Eco-mode. When the peak inductor current is lower than 100 mA typical, the device enters Eco-mode. Figure 2-10 shows Eco-mode operation, channel 1 (C1) shows the output voltage while channel 2 (C2) shows the switching node (PH). VOUT 20 mV/div PH 5 V/div t - Time - 2 ms/div Figure 2-10. TPS54332EVM-416 Eco-mode Operation 10 TPS54332 Step-Down Converter Evaluation Module User's Guide SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Board Layout 3 Board Layout This section provides a description of the TPS54332EVM-416, board layout, and layer illustrations. 3.1 Layout Figure 3-1 through Figure 3-3 shows the board layout for the TPS54332EVM-416. The top-side layer of the EVM is laid out in a manner typical of a user application. The top and bottom layers are 2-oz. copper. The top layer contains the main power traces for VIN, VOUT, and VPHASE. Also on the top layer are connections for the remaining pins of the TPS54332 and a large area filled with ground. The bottom layer contains ground and a signal route for the BOOT capacitor. The top and bottom and internal ground traces are connected with multiple vias placed around the board including ten vias directly under the TPS54332 device to provide a thermal path from the top-side ground plane to the bottom-side ground plane. The input decoupling capacitor (C2) and bootstrap capacitor (C4) are all located as close to the IC as possible. In addition, the voltage set-point resistor divider components are also kept close to the IC. The voltage divider network ties to the output voltage at the point of regulation, the copper VOUT trace past the output capacitors, C3 and C8. For the TPS54332, an additional input bulk capacitor can be required, depending on the EVM connection to the input supply. Figure 3-1. TPS54332EVM-416 Top-Side Layout SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 TPS54332 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 11 Board Layout www.ti.com Figure 3-2. TPS54332EVM-416 Bottom-Side Layout Figure 3-3. TPS54332EVM-416 Top-Side Assembly 3.2 Estimated Circuit Area The estimated printed circuit board area for the components used in this design is 0.68 in2. This area does not include test point or connectors. 12 TPS54332 Step-Down Converter Evaluation Module User's Guide SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Schematic and Bill of Materials 4 Schematic and Bill of Materials This section presents the TPS54332EVM-416 schematic and bill of materials. 4.1 Schematic Figure 4-1 is the schematic for the TPS54332EVM-416. Figure 4-1. TPS54332EVM-416 Schematic SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 TPS54332 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 13 Schematic and Bill of Materials www.ti.com 4.2 Bill of Materials Table 4-1 presents the bill of materials for the TPS54332EVM-416. Table 4-1. TPS54332EVM-416 Bill of Materials Count RefDes Value Description Size Part Number MFR 0 C1 Capacitor, Ceramic, 25 V, X5R, 10% 1206 1 C2 10 μF Capacitor, Ceramic, 25 V, X5R, 10% 1206 GRM31CR61E106KA 12 muRata 1 C3, C8 47 μF Capacitor, Ceramic, 10 V, X5R, 10% 1210 Std Std 1 C4 0.1 μF Capacitor, Ceramic, 16 V, X7R, 10% 0603 Std Std 1 C5 0.015 μF Capacitor, Ceramic, 16 V, X7R, 10% 0603 Std Std 1 C6 180 pF Capacitor, Ceramic, 50 V, NPO, 5% 0603 Std Std 1 C7 10 pF Capacitor, Ceramic, 50 V, NPO, 5% 0603 Std Std 1 D1 B320A Diode, Schottky, 3 A, 20 V SMA 0.27 × 0.25 inch B320A Diodes Inc 2 J1, J4 ED1514 Terminal Block, 2-pin, 6-A, 3.5mm 0.100 × 2 ED1514 OST 2 J2, J3 PTC36SAAN Header, 2-pin, 100-mil spacing, (36-pin strip) 0.402 × 0.394 inch PTC36SAAN 1 L1 2.5 μH Inductor, SMT, 9.26 A, 10 mΩ 0603 MSS1038-252NX_ Coilcraft 1 R1 150 KΩ Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R2 48.7 KΩ Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R3 75.0 kΩ Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R4 0 Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R5 10.2 kΩ Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R6 4.75 kΩ Resistor, Chip, 1/16W, 1% 0603 Std Std 0 R7 Resistor, Chip, 1/16W, 1% 0.100 × 0.100 inch Std Std 3 TP1, TP3, TP5 5000 Test Point, Red, Thru Hole Color Keyed 0.100 × 0.100 inch 5000 Keystone 3 TP2, TP4, TP6 5001 Test Point, Black, Thru Hole Color Keyed SO8[DDA] 5001 Keystone 1 U1 TPS54332DD IC, Step-Down Swift Converter, 3.5 V–28 V, A 3.5 A TPS54332DDA TI 1 PCB HPA416 Any 1 Shunt 929950-00 3M 5 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (February 2009) to Revision A (October 2021) Page • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 • Updated the user's guide title............................................................................................................................. 2 14 TPS54332 Step-Down Converter Evaluation Module User's Guide SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2022 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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