TPS54340EVM-182

User's Guide SLVU794A – October 2012 – Revised February 2013 Using the TPS54340 Step-Down Converter Evaluation Module This user's guide contains information for the TPS54340EVM-182 evaluation module (PWR182) including the performance specifications, schematic, and the bill of materials. spacer so the title "List of Tables" will print on page with the list. 1 2 3 4 Contents Introduction .................................................................................................................. 2 Test Setup and Results .................................................................................................... 5 Board Layout ............................................................................................................... 12 Schematic and Bill of Materials .......................................................................................... 15 List of Figures ................................................................................................ 1 TPS54340EVM-182 Board 2 Efficiency Versus Load Current ........................................................................................... 5 3 Light-Load Efficiency 4 Efficiency Versus Load Current ........................................................................................... 6 5 Light Load Efficiency 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ....................................................................................................... ....................................................................................................... Regulation Versus Output Current ........................................................................................ Regulation Versus Input Voltage.......................................................................................... Load Transient Response ................................................................................................. Loop Response ............................................................................................................. Line Transient Response .................................................................................................. Output Voltage Ripple CCM .............................................................................................. Output Voltage Ripple DCM .............................................................................................. Output Voltage Ripple Eco-mode ......................................................................................... Input Voltage Ripple CCM ................................................................................................. Input Voltage Ripple DCM ................................................................................................. Start Up Relative to VIN .................................................................................................. Start Up Relative to EN ................................................................................................... Prebias Start Up Relative to EN ......................................................................................... Shutdown Relative to VIN ................................................................................................. Shutdown Relative to EN ................................................................................................. Low Dropout Operation ................................................................................................... Low Dropout Start Up and Shutdown ................................................................................... TPS54340EVM-182 Top Assembly and Silkscreen .................................................................. TPS54340EVM-182 Top-Side Layout .................................................................................. TPS54340EVM-182 Layer 2 Layout .................................................................................... TPS54340EVM-182 Layer 3 Layout .................................................................................... TPS54340EVM-182 Bottom-Side Layout .............................................................................. TPS54340EVM-182 Schematic.......................................................................................... 2 5 6 6 6 7 7 7 8 8 8 9 9 10 10 10 11 11 11 11 12 13 13 14 14 15 Eco-mode is a trademark of Texas Instruments. SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 1 Introduction www.ti.com List of Tables 1 1 Input Voltage and Output Current Summary ............................................................................ 3 2 TPS54340EVM-182 Performance Specification Summary ............................................................ 4 3 R5 Values for Common Output Voltages ................................................................................ 4 4 EVM Connectors and Test points ......................................................................................... 5 5 TPS54340EVM-182 Bill of Materials .................................................................................... 16 Introduction This user's guide contains background information for the TPS54340 as well as support documentation for the TPS54340EVM-182 evaluation module (PWR182). Also included are the performance specifications, the schematic, and the bill of materials for the TPS54340EVM-182. Figure 1. TPS54340EVM-182 Board 2 Using the TPS54340 Step-Down Converter Evaluation Module SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Introduction www.ti.com 1.1 Background The TPS54340 DC-DC converter is designed to provide up to a 3.5-A output from an input voltage source of 4.5 V to 42 V. Rated input voltage and output current range for the evaluation module are given in Table 1. This evaluation module is designed to demonstrate the small, printed-circuit-board (PCB) areas that may be achieved when designing with the TPS54340 regulator. The switching frequency is externally set at a nominal 600 kHz. The high-side MOSFET is incorporated inside the TPS54340 package along with the gate-drive circuitry. The compensation components are external to the integrated circuit (IC), and an external resistor divider allows for an adjustable output voltage. Additionally, the TPS54340 provides an adjustable undervoltage lockout with hysteresis through an external resistor divider. The absolute maximum input voltage is 42 V for the TPS54340EVM-182. Table 1. Input Voltage and Output Current Summary 1.2 EVM Input Voltage Range Output Current Range TPS54340EVM-182 VIN = 6 V to 42 V IOUT = 0 A to 3.5 A Performance Specification Summary A summary of the TPS54340EVM-182 (EVM) performance specifications is provided in Table 2. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 3.3 V, unless otherwise specified. This EVM is designed and tested for VIN = 6 V to 42 V. The ambient temperature is 25°C for all measurements, unless otherwise noted. SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 3 Introduction www.ti.com Table 2. TPS54340EVM-182 Performance Specification Summary Specification Test Conditions MIN VIN voltage range 6 Output voltage set point MAX 12 42 3.3 Output current range VIN = 6 V to 42 V Line regulation IOUT = 3.5 A, VIN = 6 V to 42 V ±0.3% Load regulation VIN = 12 V, IOUT = 0.001 A to 3.5 A ±0.6% IOUT = 0.875 A to 2.625 A Load transient response IOUT = 2.625 A to 0.875 A 0 Unit V V 3.5 A Voltage change –140 mV Recovery time 300 µs Voltage change 140 mV Recovery time 300 µs 39 kHz Loop bandwidth VIN = 12 V, IOUT = 3.5 A Phase margin VIN = 12 V, IOUT = 3.5 A 59 ° Input voltage ripple IOUT = 3.5 A 300 mVpp Output voltage ripple IOUT = 3.5 A 10 mVpp Output rise time Operating frequency 1.3 TYP Maximum efficiency TPS54340EVM-182, VIN = 12 V, IOUT = 1.1 A DCM threshold VIN = 12 V Pulse skipping threshold No load input current 2 ms 600 kHz 88% 342 mA VIN = 12 V 31 mA VIN = 12 V 237 µA UVLO start threshold 5.75 V UVLO stop threshold 4.5 V Modifications These evaluation modules are designed to provide access to the features of the TPS54340. Some modifications can be made to this module. 1.3.1 Output Voltage Set Point To change the output voltage of the EVM, it is necessary to change the value of resistor R5. Changing the value of R5 can change the output voltage above 0.8 V. The value of R5 for a specific output voltage can be calculated using Equation 1, where RHS is R5 and RLS is R6. æ Vout - 0.8V ö RHS = RLS ´ ç ÷ 0.8 V è ø (1) Table 3 lists the R5 values for some common output voltages assuming R6 = 10.2 kΩ. Note VIN must be in a range so the minimum on-time is greater than 135 ns. The values given in Table 3 are standard 1% values, not the exact value calculated using Equation 1. Table 3. R5 Values for Common Output Voltages 4 Output Voltage (V) R5 Value (kΩ) 1.8 12.7 2.5 21.5 3.3 31.6 5.0 53.6 Using the TPS54340 Step-Down Converter Evaluation Module SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Test Setup and Results www.ti.com Be aware, changing the output voltage can affect the loop response. It may be necessary to modify the compensation components. See the data sheet for details. 2 Test Setup and Results This section describes how to properly connect, set up, and use the EVM. The section also includes test results typical for the EVM covering efficiency, output voltage regulation, load transients, loop response, output ripple, input ripple, start up, and shutdown. 2.1 I/O Connections This EVM includes I/O connectors and test points as shown in Table 4. A power supply capable of supplying at least 3.5 A must be connected to J2 through a pair of 20-AWG wires. The load must be connected to J1 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. TP3 is used to monitor the output voltage with TP4 as the ground reference. Table 4. EVM Connectors and Test points Reference Designator 2.2 Function J1 VOUT, 3.3 V at 3.5-A maximum J2 VIN (see Table 1 for VIN range) J3 EN jumper. Connect EN to ground to disable, open to enable. TP1 VIN test point at VIN connector TP2 GND test point at VIN TP3 Output voltage test point at VOUT connector TP4 GND test point at VOUT connector TP5 SW test point TP6 VOUT test point used for loop response measurements TP7 Test point between voltage divider network and output. Used for loop response measurements. Efficiency 100 100 90 90 80 80 70 70 Efficiency - % Efficiency - % The efficiency of this EVM peaks at a load current of about 1.1 A with VIN = 12 V, and then decreases as the load current increases towards full load. Figure 2 shows the efficiency for the EVM. Figure 3 shows the light-load efficiency for the EVM using a semi-log scale. Figure 4 and Figure 5 show the efficiency with VOUT adjusted to 5.0 V with 600-kHz switching frequency. Measurements are taken at an ambient temperature of 25°C. The efficiency may be lower at higher ambient temperatures due to temperature variation in the drain-to-source resistance of the internal MOSFET. 60 50 40 VOUT = 3.3V, fsw = 600 kHz 30 20 VOUT = 3.3V, fsw = 600 kHz 60 50 40 30 20 6Vin 12Vin 24Vin 10 36Vin 42Vin 0 0 0.5 1.0 1.5 2.0 2.5 3.0 6Vin 12Vin 24Vin 10 3.5 0 0.001 0.01 IO - Output Current - A Figure 2. Efficiency Versus Load Current SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback 36Vin 42Vin 0.1 1 IO - Output Current - A Figure 3. Light-Load Efficiency Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 5 www.ti.com 100 100 90 90 80 80 70 70 Efficiency - % Efficiency - % Test Setup and Results 60 50 40 VOUT = 5V, fsw = 600 kHz 30 20 60 50 40 VOUT = 5V, fsw = 600 kHz 30 20 6Vin 12Vin 24Vin 10 36Vin 42Vin 0 0 0.5 1.0 1.5 2.5 2.0 3.0 3.5 6Vin 12Vin 24Vin 10 0 0.001 4.0 1 IO - Output Current - A Figure 4. Efficiency Versus Load Current 2.3 0.1 0.01 IO - Output Current - A 36Vin 42Vin Figure 5. Light Load Efficiency Output Voltage Regulation The load regulation for the EVM is shown in Figure 6. The line regulation for the EVM is shown in Figure 7. Measurements are given for an ambient temperature of 25°C. 0.3 1 Output Voltage Deviation - % 0.8 Output Voltage Deviation - % VIN = 12V, VOUT = 3.3V, fsw = 600 kHz 0.6 0.4 0.2 0 -0.2 0.4 -0.6 -0.8 -1 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 VOUT = 3.3V, IOUT = 3.5A fsw = 600 kHz 0.2 0.1 0 -0.1 0.2 -0.3 5 10 IO - Output Current - A Figure 6. Regulation Versus Output Current 6 Using the TPS54340 Step-Down Converter Evaluation Module 15 20 25 30 35 40 45 VIN - Input Voltage - V Figure 7. Regulation Versus Input Voltage SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Test Setup and Results www.ti.com 2.4 Load Transients and Loop Response The EVM response to load transients is shown in Figure 8. The current step is from 25% to 75% of the maximum rated load at 12-V input. The current step slew rate is 100 mA/µs. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. The EVM loop-response characteristics are shown in Figure 9. Gain and phase plots are shown for VIN voltage of 12 V. Load current for the measurement is 3.5 A. 180 60 40 C4: IOUT 100 mV/div 60 Gain - dB 20 C4 C3 120 C3: VOUT ac coupled Gain 0 0 -60 -20 VIN = 12V, VOUT = 3.3V, IOUT = 3.5A -40 -60 10 100 Time = 100 ms/div -120 -180 1000 10000 100000 1000000 Frequency - Hz Figure 8. Load Transient Response 2.5 Phase - degree 1 A/div Phase Figure 9. Loop Response Line Transients 10 V/div The EVM response to line transients is shown in Figure 10. The input voltage step is from 8.0 V to 40 V. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. 20 mV/div VIN VOUT -3.3 V offset Time = 4 ms/div Figure 10. Line Transient Response SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 7 Test Setup and Results 2.6 www.ti.com Output Voltage Ripple The EVM CCM output voltage ripple is shown in Figure 11. The output current is the rated full load of 3.5 A and VIN = 12 V. The voltage ripple is measured directly across the output capacitors. The DCM output voltage ripple is shown in Figure 12. The output current is 0.1 A and VIN = 12 V. The Pulse Skip Eco-mode™ output voltage ripple is shown in Figure 13. There is no external load on the output and VIN = 12 V. 10 V/div C1 500 mA/div C4: IL 1 A/div 10 V/div C1: SW C2: VOUT ac coupled 10 mV/div 20 mV/div IOUT = 3.5 A C2 C4 C1: SW C1 C4: IL C4 IOUT = 100 mA C2 C2: VOUT ac coupled Time = 2 ms/div Time = 2 ms/div 20 mV/div 200 mA/div 10 V/div Figure 11. Output Voltage Ripple CCM Figure 12. Output Voltage Ripple DCM C1: SW C1 C4: IL C4 C2: VOUT ac coupled C2 No Load Time = 2 ms/div Figure 13. Output Voltage Ripple Eco-mode 8 Using the TPS54340 Step-Down Converter Evaluation Module SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Test Setup and Results www.ti.com 2.7 Input Voltage Ripple The EVM CCM input voltage ripple is shown in Figure 14. The output current is the rated full load of 3.5 A and VIN = 12 V. The voltage ripple is measured directly across the input capacitors. 10 V/div C1: SW C1 1 A/div C4: IL IOUT = 3.5 A 50 mV/div 200 mV/div C3: VIN ac coupled 500 mA/div 10 V/div The DCM input voltage ripple is shown in Figure 15. The output current is 0.1 A and VIN = 12 V. C2 C4 C1: SW C1 C4: IL C4 IOUT = 100 mA C3: VIN ac coupled C3 Time = 2 ms/div Figure 14. Input Voltage Ripple CCM SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Time = 2 ms/div Figure 15. Input Voltage Ripple DCM Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 9 Test Setup and Results 2.8 www.ti.com Start Up The start up waveforms are shown in Figure 16, Figure 17, and Figure 18. The input voltage for these plots is 12 V with a 3.5-A resistive load. In Figure 16 the top trace shows VIN, the middle trace shows EN, and the bottom trace shows VOUT. The input voltage is initially applied, and when the input reaches the undervoltage lockout threshold, the start up sequence begins and the output ramps up toward the set value of 3.3 V. In Figure 17 the input voltage is initially applied with EN held low. When EN is released, the start up sequence begins and the output ramps up toward the set value of 3.3 V. 5 V/div 5 V/div In Figure 18 the input voltage is initially applied with EN held low. An external voltage of 1.8 V is supplied to VOUT. When EN is released, the start up sequence begins and the internal reference ramps up from 0 V with the internal soft-start. When the internal reference reaches the FB voltage the output begins ramping toward the set value of 3.3 V. C1: VIN C1: VIN C3: EN C3 2 V/div C1 C2: VOUT 2 V/div 2 V/div 2 V/div C1 C2 C3: EN C3 C2: VOUT C2 Time = 2 ms/div Time = 2 ms/div 1 V/div 2 V/div 5 V/div Figure 16. Start Up Relative to VIN Figure 17. Start Up Relative to EN C1: VIN C2: EN C3: VOUT Time = 2 ms/div Figure 18. Prebias Start Up Relative to EN 10 Using the TPS54340 Step-Down Converter Evaluation Module SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Test Setup and Results www.ti.com 2.9 Shutdown The shutdown waveforms are shown in Figure 19 and Figure 20. The input voltage for these plots is 12 V with a 3.5-A resistive load. The top trace shows VIN, the middle trace shows EN, and the bottom trace shows VOUT. In Figure 19 the input voltage is removed, and when the input falls below the undervoltage lockout threshold, the TPS54340 shuts down and the output falls to ground. 5 V/div 5 V/div In Figure 20, the input voltage is held at 12 V, and EN is shorted to ground. When EN is grounded, the TPS54340 is disabled, and the output voltage discharges to ground. C2: EN 2 V/div C2: EN 2 V/div C1: VIN 2 V/div 2 V/div C1: VIN C3: VOUT C3: VOUT Time = 1 ms/div Time = 200 µs/div Figure 19. Shutdown Relative to VIN Figure 20. Shutdown Relative to EN 2.10 Low Dropout Operation For improved low dropout operation, the TPS54340 includes a small integrated low-side MOSFET to pull SW to GND when the BOOT to SW voltage drops below 2.1 V. This recharges the BOOT capacitor for driving the high-side MOSFET. Figure 21 shows the steady state operation and Figure 22 shows the start up and shutdown in a low dropout condition. C1: SW 20 mV/div 2 V/div 200 mA/div 2 V/div IOUT = 1 A EN Floating C4 C4: IL VIN C3 VOUT C3: VOUT ac coupled VIN = 5.5 V VOUT = 5 V No Load EN Floating Time = 20 ms/div Figure 21. Low Dropout Operation SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Time = 40 ms/div Figure 22. Low Dropout Start Up and Shutdown Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 11 Board Layout 3 www.ti.com Board Layout This section provides a description of the EVM, board layout, and layer illustrations. 3.1 Layout The board layout for the EVM is shown in Figure 23 through Figure 27. 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 SW. Also on the top layer are connections for the remaining pins of the TPS54340 and a large area filled with ground. The bottom layer contains ground and a signal route for the bootstrap capacitor. The top and bottom and internal ground traces are connected with multiple vias placed around the board including six vias directly under the TPS54340 device to provide a thermal path from the top-side ground plane to the bottom-side ground plane. The input decoupling capacitors (C2 and C3), bootstrap capacitor (C4), and frequency set resistor (R3) 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 connector (J1). For the TPS54340, an additional input bulk capacitor may be required (C3), depending on the EVM connection to the input supply. Figure 23. TPS54340EVM-182 Top Assembly and Silkscreen 12 Using the TPS54340 Step-Down Converter Evaluation Module SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Board Layout www.ti.com Figure 24. TPS54340EVM-182 Top-Side Layout Figure 25. TPS54340EVM-182 Layer 2 Layout SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 13 Board Layout www.ti.com Figure 26. TPS54340EVM-182 Layer 3 Layout Figure 27. TPS54340EVM-182 Bottom-Side Layout 14 Using the TPS54340 Step-Down Converter Evaluation Module SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com 3.2 Estimated Circuit Area The estimated printed-circuit-board area for the components used in this design is 1.025 in2 (661 mm2). This area does not include test points or connectors. This design uses 0603 components for easy modifications. The area can be reduced by using smaller-sized components. 4 Schematic and Bill of Materials This section presents the EVM schematic and bill of materials. 4.1 Schematic Figure 28 is the schematic for the EVM. 0.1uF C4 2 GND 1 J2 6V to 42V C3 TP2 1 + 2 C1 2.2uF 3 C2 2.2uF 4 R1 365k BOOT SW VIN GND EN COMP RT/CLK PWRPD VIN 1 FB L1 5.6 uH TP5 U1 TPS54340DDA TP1 TP6 7 C6 D1 6 5 TP3 J1 3.3V @ 3.5A 8 FB C7 100uF B560C 1 C9 R7 49.9 + 1 TP4 1 VOUT 2 GND TP7 9 GND R4 11.5k J3 EN 1 GND 2 R2 86.6k R3 162k R5 31.6k C8 FB 47pF C5 TP8 5600pF 1 R6 10.2k Not Populated Figure 28. TPS54340EVM-182 Schematic SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Using the TPS54340 Step-Down Converter Evaluation Module Copyright © 2012–2013, Texas Instruments Incorporated 15 Schematic and Bill of Materials 4.2 www.ti.com Bill of Materials Table 5 presents the bill of materials for the EVM. Table 5. TPS54340EVM-182 Bill of Materials Count RefDes Value Description Size Part Number MFR 0 C3 open Capacitor, 100 V Multi sizes Engineering Only STD 1 C4 0.1 µF Capacitor, ceramic, 10 V, X5R, 10% 0603 STD STD 1 C5 5600 pF Capacitor, ceramic, 25 V, X5R, 20% 0603 STD STD 1 C8 47 pF Capacitor, ceramic, 50 V, C0G, 5% 0603 STD STD 0 C7, C9 open Capacitor Multi sizes Engineering Only STD 2 C1-2 2.2 µF Capacitor, ceramic, 100 V, X7R, 10% 1210 STD STD 2 C6 100 µF Capacitor, ceramic, 6.3 V, X5R, 20% 1210 STD STD 1 D1 B560C Diode, 5 A, 60 V SMC B560C-13-F Diodes Inc 1 J3 PEC02SAAN Header, male 2-pin, 100-mil spacing 0.100 in × 2 PEC02SAAN Sullins 2 J1-2 ED555/2DS Terminal block, 2-pin, 6 A, 3.5 mm 0.27 × 0.25 in ED555/2DS OST 1 L1 5.6 µH Inductor, SMT, 6.7A, 20.6 mΩ 0.413 x 0.402 in 7443552560 WE 1 R1 365 kΩ Resistor, chip, 1/16W, 1% 0603 STD STD 1 R2 86.6 kΩ Resistor, chip, 1/16W, 1% 0603 STD STD 1 R3 162 kΩ Resistor, chip, 1/16W, 1% 0603 STD STD 1 R4 11.5 kΩ Resistor, chip, 1/16W, 1% 0603 STD STD 1 R5 31.6 kΩ Resistor, chip, 1/16W, 1% 0603 STD STD 1 R6 10.2 kΩ Resistor, chip, 1/16W, 1% 0603 STD STD 1 R7 49.9 Ω Resistor, chip, 1/16W, 1% 0603 STD STD 1 SH1 Short jumper, 100mil 0.100 in 929950-00 3M 1 TP6 5013 Test point, orange, thru hole 0.125 × 0.125 in 5013 Keystone 1 TP7 5014 Test point, yellow, thru hole 0.125 × 0.125 in 5014 Keystone 3 TP1 TP3 TP5 5010 Test point, red, thru hole 0.125 × 0.125 in 5010 Keystone 3 TP2 TP4 TP8 5011 Test point, black, thru hole 0.125 × 0.125 in 5011 Keystone 1 U1 TPS54340DDA IC, 42 V, 3.5 A, low Iq, current mode, buck regulator HSOIC TPS54340DDA TI 1 – PWR182 Any PCB, 3 in × 3 in × 0.062 in Notes: 1. These assemblies are ESD sensitive, observe ESD precautions. 2. These assemblies must be clean and free from flux and all contaminants. Use of no-clean flux is not acceptable. 3. These assemblies must comply with workmanship standards IPC-A-610 Class 2. 4. Ref designators marked with an asterisk ('**') cannot be substituted. All other components can be substituted with equivalent MFG's components. 16 Using the TPS54340 Step-Down Converter Evaluation Module SLVU794A – October 2012 – Revised February 2013 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visit www.ti.com/esh or contact TI. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. REGULATORY COMPLIANCE INFORMATION As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal Communications Commission (FCC) and Industry Canada (IC) rules. For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. General Statement for EVMs including a radio User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization. For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. For EVMs annotated as IC – INDUSTRY CANADA Compliant This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs including radio transmitters This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Concerning EVMs including detachable antennas Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada. Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. Concernant les EVMs avec appareils radio Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 【Important Notice for Users of this Product in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of Japan, Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product, or Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp 【ご使用にあたっての注】 本開発キットは技術基準適合証明を受けておりません。 本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。 1. 2. 3. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。 実験局の免許を取得後ご使用いただく。 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 　　　上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・インスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル http://www.tij.co.jp SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end product. Your Sole Responsibility and Risk. You acknowledge, represent and agree that: 1. 2. 3. 4. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even if the EVM should fail to perform as described or expected. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials. Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in development environments should use these EVMs. Agreement to Defend, Indemnify and Hold Harmless. You agree to defend, indemnify and hold TI, its licensors and their representatives harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, "Claims") arising out of or in connection with any use of the EVM that is not in accordance with the terms of the agreement. This obligation shall apply whether Claims arise under law of tort or contract or any other legal theory, and even if the EVM fails to perform as described or expected. Safety-Critical or Life-Critical Applications. If you intend to evaluate the components for possible use in safety critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, such as devices which are classified as FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. 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