TPS40190EVM-001

www.ti.com Table of Contents User’s Guide TPS40190 Buck Controller Evaluation Module User's Guide Table of Contents 1 Introduction.............................................................................................................................................................................2 1.1 Description......................................................................................................................................................................... 2 1.2 Applications........................................................................................................................................................................2 1.3 Features............................................................................................................................................................................. 2 2 TPS40190EVM-001 Electrical Performance Specifications................................................................................................ 2 3 Schematic................................................................................................................................................................................3 3.1 Adjusting Output Voltage (R1)............................................................................................................................................4 3.2 Adjusting Short Circuit Protection (R6).............................................................................................................................. 4 3.3 Disable (TP1 and SW1)..................................................................................................................................................... 4 4 Test Setup................................................................................................................................................................................5 4.1 Equipment.......................................................................................................................................................................... 5 4.2 Equipment Setup................................................................................................................................................................5 4.3 Start-Up/Shutdown Procedure........................................................................................................................................... 7 4.4 Control Loop Gain and Phase Measurement Procedure................................................................................................... 8 4.5 Equipment Shutdown......................................................................................................................................................... 8 5 TPS40190EVM Typical Performance Data and Characteristic Curves...............................................................................8 5.1 Efficiency............................................................................................................................................................................8 5.2 Line and Load Regulation.................................................................................................................................................. 9 6 EVM Assembly Drawings and Layout.................................................................................................................................10 7 List of Materials.....................................................................................................................................................................14 8 Revision History................................................................................................................................................................... 15 Trademarks All trademarks are the property of their respective owners. SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 TPS40190 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 1 Introduction www.ti.com 1 Introduction The TPS40190EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.5-V output at up to 10 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 TPS40190 reduced pin count synchronous buck controller. 1.1 Description The TPS40190EVM-001 is designed to use a regulated 12-V (10 V–14 V) bus to produce a high current, regulated 1.5-V output at up to 10-A of load current. The TPS40190EVM-001 is design to demonstrate the TPS40190 in a typical regulated bus to low-voltage application while providing a number of test points to evaluate the performance of the TPS40190 in a given application. The EVM can be modified to support output voltages from 0.9 V to 3.3 V by changing a single set resistor. 1.2 Applications • • • • Non-isolated medium current point of load and low voltage bus converters Networking equipment Telecommunications equipment DC power distributed systems 1.3 Features • • • • • • • • 10-V to 14-V input range 1.5-V fixed output, adjustable with single resistor 10 ADC steady state output current 300-kHz switching frequency (fixed by the TPS40190) Single main switch N-channel MOSFET and single synchronous rectifier N-channel MOSFET Double sided 3-inch × 3-inch PCB with all components on top side Active converter uses less than 1.2 square inches – 1.775 × 0.670 Convenient test points for probing critical waveforms and non-invasive loop response testing 2 TPS40190EVM-001 Electrical Performance Specifications Table 2-1. TPS40190EVM-001 Electrical and Performance Specifications Parameter Notes and Conditions Min Typ Max Units Input Characteristics Input voltage range 10 14 V Max input current VIN = 10 V, IOUT = 10 A 2 A No-load input current VIN = 14 V, IOUT = 0 A 100 mA Output Characteristics Output voltage Output voltage regulation Output voltage ripple R6 = 6.49 k, R5 = 10 k 1.45 1.50 Line regulation (10 V < VIN < 14 V, IOUT = 5 A) Load regulation (< 0 A < IOUT < 10 A, VIN = 12 V) VIN = 14 V, IOUT = 10 A 25 Output load current 0 Output over current 1.55 V 1 % 50 mVpp 10 A 23 A System Characteristics Switching frequency Peak efficiency Full load efficiency 2 240 VOUT = 1.5 V, 8 A < IOUT < 12 A VOUT = 1.5 V, IOUT = 15 A TPS40190 Buck Controller Evaluation Module User's Guide 300 V12V_IN = 10 V 87 V12V_IN = 12 V 85 V12V_IN = 14 V 83 V12V_IN = 10 V 84 V12V_IN = 12 V 83 V12V_IN = 14 V 81 360 kHz % % SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Schematic 3 Schematic Figure 3-1. TPS40190EVM-001 Power Stage/Control Schematic Note The schematic is for reference only. See Table 3-2 for specific values. SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback TPS40190 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 3 Schematic www.ti.com 3.1 Adjusting Output Voltage (R1) The regulated output voltage can be adjusted within a limited range by changing the ground resistor in the feedback resistor divider (R1). The output voltage is given by Equation 1. where • • + R1 VOUT =  VVREF  ×   R5R1 (1) VVREF = 0.591 V R5 = 10 kΩ Table 3-1 contains common values for R1 to generate popular output voltages. The TPS40190EVM-001 is stable through these output voltages but the efficiency can suffer as the power stage is optimized for the 1.5-V output. Table 3-1. Adjusting VOUT with R1 VOUT 2.15 k 2.5 V(1) 3.09 k 2.25 V 3.57 k 2.0 V 4.22 k 1.8 V 4.87 k 1.5 V 6.49 k 1.2 V 9.76 k 3.3 (1) R1 V(1) For output voltages greater than 2.5 V, change C11 to 330 μF, 4 V or higher PosCAP. 3.2 Adjusting Short Circuit Protection (R6) The TPS40190 uses a selectable current limit for short circuit protection. The current limit is selected from three levels by placing a resistor at R6. The TPS40190 compares the voltage drop across the high-side FET (VDD to SW) to an internal reference voltage selected during start-up. The voltage levels are shown in Table 3-2. Table 3-2. Adjusting VSCP with R6 VSCP R6 160 mV 3.9 k 320 mV OPEN 420 mV 12 k The current before declaring short circuit protection can be determined by dividing the VSCP by the RDS(ON) of the high-side FET (Q2). 3.3 Disable (TP1 and SW1) The TPS40190EVM-001 provides both a Disable input (TP1) and a Disable switch (SW1) to allow the user to evaluate the Enable Function of the TPS40190. When the switch is ON or TP1 is pulled high, Q1 pulls EN (U1 pin 1) to ground and disables the TPS40190 IC. 4 TPS40190 Buck Controller Evaluation Module User's Guide SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Test Setup 4 Test Setup 4.1 Equipment 4.1.1 Voltage Source (V12V_IN) The input voltage source (V12V_IN) should be a 0-V to 15-V variable DC source capable of 5 ADC. Connect V12V_IN to J1 as shown in Table 3-2. 4.1.2 Meters • • • A1: 0 ADC to 5 ADC, ammeter V1: V12_IN, 0-V to 15-V voltmeter V2: V1V5_OUT, 0-V to 5-V voltmeter 4.1.3 Loads (LOAD1) The output load (LOAD1) should be an electronic constant current mode load capable of 0-ADC to 15 ADC at 1.5 V. 4.1.4 Oscilloscope A digital or analog oscilloscope can be used to measure the ripple voltage on VOUT. The oscilloscope should be set for the following to take output ripple measurements: • • • • • 1-MW impedance 20-MHz bandwidth AC coupling 1-ms/division horizontal resolution 20-mV/division vertical resolution TP 9 and TP 10 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through TP 9 and holding the ground barrel to TP 10 as shown in Figure 4-1. For a hands-free approach, the loop in TP 10 can be cut and opened to cradle the probe barrel. Using a leaded ground connection may induce additional noise due to the large ground loop area. 4.1.5 Recommended Wire Gauge V12V_IN to J1 The connection between the source voltage, V12V_IN, and J1 of the TPS40190EVM-001 can carry as much as 3 ADC. The minimum recommended wire size is AWG #16 with the total length of wire less than four feet (2-feet input, 2-feet return). J2 to LOAD1 (Power) The power connection between J2 of TPS40190EVM-001 and LOAD1 can carry as much as 15 ADC. The minimum recommended wire size is 2× AWG #16, with the total length of wire less than four feet (2-feet output, 2-feet return). 4.1.6 Other FAN This evaluation module includes components that can get hot to the touch. Because this EVM is not enclosed to allow probing of circuit nodes, a small fan capable of 200-400 lfm is required to reduce component surface temperatures to prevent user injury. The EVM should not be left unattended while powered. The EVM should not be probed while the fan is not running. 4.2 Equipment Setup Figure 4-1 is the basic test setup recommended to evaluate the TPS40190EVM-001. Please note that although the return for J1 and J2 are the same, the connections should remain separate as shown in Figure 4-1. SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 TPS40190 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 5 Test Setup www.ti.com 4.2.1 Procedure 1. 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. Electrostatic smock and safety glasses should also be worn. 2. Prior to connecting the DC input source, V12V_IN, it is advisable to limit the source current from V12V_IN to 5.0-A maximum. Make sure V12V_IN is initially set to 0 V and connected as shown in Figure 4-1. 3. Connect the ammeter A1 (0-A to 5-A range) between V12V_IN and J1 as shown in Figure 4-1. 4. Connect voltmeter V1 to TP6 and TP7 as shown in Figure 4-1. 5. Connect LOAD1 to J2 as shown in Figure 4-1. Set LOAD1 to constant current mode to sink 0 ADC before V12V_IN is applied. 6. Connect voltmeter V2 across TP8 and TP11 as shown in Figure 4-1. 7. Connect an oscilloscope probe to TP9 and TP10 as shown in Figure 4-1Figure 3. 8. Place a fan as shown in Figure 4-1 and turn on, making sure air is flowing across the EVM. 4.2.2 Diagram Figure 4-1. TPS40190EVM-001 Recommended Test Setup 6 TPS40190 Buck Controller Evaluation Module User's Guide SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Test Setup Figure 4-2. Output Ripple Measurement – Tip and Barrel Using TP9 and TP10 Figure 4-3. Control Loop Measurement Setup 4.3 Start-Up/Shutdown Procedure 1. 2. 3. 4. Increase V12V_IN from 0 V to 10 VDC. Vary LOAD1 from 0 ADC to 10 ADC. Vary V12V_IN from 1- VDC to 14 VDC. Decrease LOAD1 to 0 A. SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 TPS40190 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 7 Test Setup www.ti.com 4.4 Control Loop Gain and Phase Measurement Procedure 1. 2. 3. 4. 5. 6. 7. Connect a 1-kHz to 1-MHz isolation transformer to TP2 and TP3 as shown in Figure 4-1. Connect an input signal amplitude measurement probe (Channel A) to TP2 as shown in Figure 4-1. Connect an output signal amplitude measurement probe (Channel B) to TP3 as shown in Figure 4-1. Connect the ground lead of Channel A and Channel B to TP 4 as shown in Figure 4-1. Inject 25-mV or less signal across R7 through an isolation transformer. Sweep frequency from 1 kHz to 1 MHz with 10-Hz or lower post filter. Control loop gain can be measured by 20  × LOG CℎannelB CℎannelA . 8. Control loop phase is measured by the phase difference between Channel A and Channel B. 9. Disconnect the isolation transformer from TP2 and TP3 before making other measurements (signal injection into feedback can interfere with accuracy of other measurements). 4.5 Equipment Shutdown 1. 2. 3. 4. Shut down the oscilloscope. Shut down LOAD1. Shut down V12V_IN. Shut down FAN. 5 TPS40190EVM Typical Performance Data and Characteristic Curves Figure 5-1 and Figure 5-2 present typical performance curves for the TPS40190EVM-001. Since the actual performance data can be affected by measurement techniques and environmental variables, these curves are presented for reference and can differ from actual field measurements. 5.1 Efficiency Figure 5-1. TPS40190EVM-001 Efficiency, VIN = 10 V to 14 V, VOUT = 1.5 V, IOUT = 0 A to 10 A 8 TPS40190 Buck Controller Evaluation Module User's Guide SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com TPS40190EVM Typical Performance Data and Characteristic Curves 5.2 Line and Load Regulation Figure 5-2. TPS40190EVM-001 Line and Load Regulation SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 TPS40190 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 9 EVM Assembly Drawings and Layout www.ti.com 6 EVM Assembly Drawings and Layout Figure 6-1 and Figure 6-4 show the design of the TPS40190EVM-001 printed circuit board. The EVM has been designed using a double sided, 2-oz copper-clad circuit board 3.0-inch × 3.0-inch with all components on the top side to allow the user to easily view, probe, and evaluate the TPS40190 control IC in a practical application. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space constrained systems. Figure 6-1. TPS40190EVM-001 Component Placement (Viewed from Top) 10 TPS40190 Buck Controller Evaluation Module User's Guide SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com EVM Assembly Drawings and Layout Figure 6-2. TPS40190EVM-001 Silkscreen (Viewed from Top) SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 TPS40190 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 11 EVM Assembly Drawings and Layout www.ti.com Figure 6-3. TPS40190EVM-001 Top Copper (Viewed from Top) 12 TPS40190 Buck Controller Evaluation Module User's Guide SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com EVM Assembly Drawings and Layout Figure 6-4. TPS40190EVM-001 Bottom Copper (X-Ray View from Top) SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 TPS40190 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 13 List of Materials www.ti.com 7 List of Materials Table 7-1. TPS40190EVM-001 Bill of Materials Count RefDes Description Size Mfr PartNumber 1 C1 Capacitor,Ceramic, 2200 pF, 50 V, X7R 0603 Std Std 1 C11 Capacitor,PosCAP, 330 μF, 6.3 V, 20% 7343 Sanyo 6TPB330M 0 C12 Capacitor,Aluminum, open 8x10mm 1 C13 Capacitor,Ceramic, 22 μF, 6.3 V, X5R 1206 TDK C3216X5R0J226KT 0 C14 Capacitor,Ceramic, open 1206 1 C2 Capacitor,Ceramic, 33 pF, 50 V, C0G 0603 Std Std 0 C3, C4, C9 Capacitor,Ceramic, open 0603 2 C5, C7 Capacitor,Ceramic, 0.1 μF, 16 V, X5R 0603 Std Std 1 C6 Capacitor,Ceramic, 4.7 μF, 6.3 V, X5R 0603 TDK C1608X5R0J475KT 2 C8, C10 Capacitor,Ceramic, 10 μF, 16 V, X5R 1206 TDK C3216X5R1C106KT 0 D1 Diode,Schottky, 0.5 A, SOD123 30 V OnSemi MBR0530T1 1 J1 TerminalBlock, 2-pin, 6-A, 3.5 mm 0.27x 0.25 OST ED1514 1 J2 TerminalBlock, 2-pin, 15-A, 5.1 mm 0.40x 0.35 OST ED1609 1 L1 Inductor,SMT, 2.2 μH, 0.492sq inch 12.5 A, 4 mΩ Coiltronics DR127-2R2 1 Q1 MOSFET, N-ch, 60 V, SOT23 115 mA, 1.2 Ω Vishay 2N7002 1 Q2 MOSFET,NChannel, 20 V, 16 A, 9 mΩ PWRPAKS0-8 Vishay Si7366DP 1 Q3 MOSFET,NChannel, 20 V, 40 A, 3.0 mΩ PWRPAKS0-8 Vishay Si7866ADP 1 R1 Resistor,Chip, 6.49 kΩ, 1/16-W, 1% 0603 Std Std 0 R2, R6, R9 Resistor,Chip, Open, 1/16-W, 1% 0603 Std Std 1 R3 Resistor,Chip, 100 kΩ, 1/16-W, 1% 0603 Std Std 2 R4, R5 Resistor,Chip, 10 kΩ, 0603 1/16-W, 1% Std Std 1 R7 Resistor,Chip, 49.9 Ω, 0603 1/16-W, 1% Std Std 1 R8 Resistor,Chip, Zero Ω, 1/16-W, 1% 0603 Std Std 1 S1 Switch,ON-ON Mini Toggle 0.28 × 0.18 4 TP1, TP2, TP3, TP5 TestPoint, White, Thru 0.125 × 0.125 Hole Farnell 5012 4 TP4, TP7, TP10, TP11 TestPoint, Black, Thru 0.125 × 0.125 Hole Farnell 5011 14 TPS40190 Buck Controller Evaluation Module User's Guide 633-G12AP SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Revision History Table 7-1. TPS40190EVM-001 Bill of Materials (continued) Count RefDes Description Size Mfr PartNumber 3 TP6, TP8, TP9 TestPoint, Red, Thru Hole 0.125 × 0.125 Farnell 5010 1 U1* IC,Low cost synchronous buck controller DRC10 TI TPS40190DRC 1 — PCB,2-Layer FR4, 3.0 3.0 inch× 3.0 inch inch × 3.0 inch × 0.062 inch Any TPS40190EVM-001 4 — Bumpon,Transparent 3M SJ5303 0.44 inch× 0.2 inch 8 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (September 2005) to Revision A (January 2022) Page • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 • Updated the user's guide title............................................................................................................................. 2 • Edited user's guide for clarity..............................................................................................................................2 SLUU232A – SEPTEMBER 2005 – REVISED JANUARY 2022 TPS40190 Buck Controller Evaluation Module User's Guide Submit Document Feedback 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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