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9 EVM Assembly Drawing and PCB Layout

The following figures (

) show the design of the TPS40400EVM-351 printed circuit

board. The EVM has been designed using 2 Layers, 2-oz copper circuit board.

Figure 9-1. Top Assembly

EVM Assembly Drawing and PCB Layout

22

TPS40400 Buck Controller Evaluation Module User's Guide

SLUU535A – SEPTEMBER 2011 – REVISED JANUARY 2022

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Copyright © 2022 Texas Instruments Incorporated

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Summary of Contents for TPS40400

Page 1: ...2 Control Loop Gain and Phase Measurement Procedure 14 7 3 List of Test Points 15 7 4 Equipment Shutdown 15 8 Performance Data and Typical Characteristic Curves 16 8 1 Efficiency 16 8 2 Load Regulatio...

Page 2: ...m a nominal 3 0 V to 20 V supply This controller is an analog PWM controller that allows programming and monitoring via the PMBus interface Introduction www ti com 2 TPS40400 Buck Controller Evaluatio...

Page 3: ...the PMBus interface 20 A DC steady state output current Programmable soft start via the PMBus interface Programmable enable function via the PMBus interface Programmable over current warning and fault...

Page 4: ...tion Line regulation VIN 8 V 14 V 0 5 Load regulation VIN 12 V Io 0 A 20 A 0 5 Output voltage ripple VIN 12 V IO 20 A 30 mVpp Output load current 0 20 A Output over current 25 Systems Characteristics...

Page 5: ...40400EVM 351 Circuit Schematic www ti com Schematic SLUU535A SEPTEMBER 2011 REVISED JANUARY 2022 Submit Document Feedback TPS40400 Buck Controller Evaluation Module User s Guide 5 Copyright 2022 Texas...

Page 6: ...tasks you can perform with the GUI include Turn on or off the power supply output either through the hardware control line or the PMBus operation command Monitor real time data Items such as input vol...

Page 7: ...asure output ripple the oscilloscope should be set for 1 M impedance 20 MHz bandwidth AC coupling 2 s division horizontal resolution 50 mV division vertical resolution As shown below in Figure 5 1 tes...

Page 8: ...wire less than 4 feet 2 feet input 2 feet return Maximum input current should be in the order of 3 5 A Output Wires J3 and J4 to Load The minimum recommended wire size is 2x AWG 14 with the total len...

Page 9: ...TP1 VIN and TP3 GND to measure the input voltage 3 Connect a voltmeter DMM 2 across shunt to measure the input current 5 4 2 Output Connections 1 Connect Load between J3 and J4 and set Load to consta...

Page 10: ...oints are defaulted to the output connector of the EVM the voltage drop in the load wires and the resulting reduced voltage applied to the electronic load may cause erratic behavior with the electroni...

Page 11: ...the input voltage to the EVM Refer to Figure 3 and Figure 4 for connections and test setup 3 Launch the Fusion GUI software Refer to the following screenshots in section 6 2 for more information 4 Con...

Page 12: ...ormance CAUTION Some parameters can be configured to values that can result in erratic or unexpected behavior on this EVM Consult the TPS40400 datasheet for guidance in configuration of parameters EVM...

Page 13: ...Screen www ti com EVM Configuration Using the Fusion GUI SLUU535A SEPTEMBER 2011 REVISED JANUARY 2022 Submit Document Feedback TPS40400 Buck Controller Evaluation Module User s Guide 13 Copyright 2022...

Page 14: ...VM as described in Section 5 3 and Figure 5 2 2 Connect isolation transformer to test points marked TP13 and TP15 3 Connect input signal amplitude measurement probe channel A to TP13 Connect output si...

Page 15: ...e of error amplifier TP10 SW Switch node TP11 LDRV Low side driver output TP12 PGND Power ground TP13 CHA Input A for loop injection TP14 SGND Signal ground TP15 CHB Input B for loop injection TP16 SG...

Page 16: ...egulation 1 202 1 2023 1 2025 1 2027 1 203 1 2032 1 2035 1 2037 1 204 1 2043 1 2045 1 2047 1 205 1 2052 1 2055 1 2057 1 206 1 2063 1 2065 1 2067 1 207 0 2 4 6 8 10 12 14 16 18 20 Output Current A Outp...

Page 17: ...ent 2 Table 8 2 Load Transients 2 VIN TRANSIENT TIMEBASE CH2 CH4 8 V 5 A 11 A 10 s VOUT IOUT 5 A div Figure 8 4 www ti com Performance Data and Typical Characteristic Curves SLUU535A SEPTEMBER 2011 RE...

Page 18: ...Ripple Table 8 4 Input and Output Ripple VIN TRANSIENT TIMEBASE CH1 CH2 14 V 20 A 400 ns VIN VOUT Figure 8 6 Performance Data and Typical Characteristic Curves www ti com 18 TPS40400 Buck Controller...

Page 19: ...Table 8 6 VIN Turn On VIN TRANSIENT TIMEBASE EVENT CH1 CH2 8 V 10 A 1 ms VIN ON VIN VOUT Figure 8 8 www ti com Performance Data and Typical Characteristic Curves SLUU535A SEPTEMBER 2011 REVISED JANUAR...

Page 20: ...Enable ON OFF 2 VIN IOUT TIMEBASE EVENT CH1 CH2 CH3 8 V 10 A 20 s CNTRL OFF CNTRL VIN VOUT Figure 8 10 Performance Data and Typical Characteristic Curves www ti com 20 TPS40400 Buck Controller Evaluat...

Page 21: ...0 A output 30 20 10 0 10 20 30 40 50 60 70 100 1 000 10 000 100 000 Frequency Hz Gain dB 60 40 20 0 20 40 60 80 100 120 140 Phase Deg 8V Gain 12V Gain 14V Gain 8V Phase 12V Phase 14V Phase Figure 8 12...

Page 22: ...nted circuit board The EVM has been designed using 2 Layers 2 oz copper circuit board Figure 9 1 Top Assembly EVM Assembly Drawing and PCB Layout www ti com 22 TPS40400 Buck Controller Evaluation Modu...

Page 23: ...www ti com EVM Assembly Drawing and PCB Layout SLUU535A SEPTEMBER 2011 REVISED JANUARY 2022 Submit Document Feedback TPS40400 Buck Controller Evaluation Module User s Guide 23 Copyright 2022 Texas Ins...

Page 24: ...r EVM Assembly Drawing and PCB Layout www ti com 24 TPS40400 Buck Controller Evaluation Module User s Guide SLUU535A SEPTEMBER 2011 REVISED JANUARY 2022 Submit Document Feedback Copyright 2022 Texas I...

Page 25: ...ww ti com EVM Assembly Drawing and PCB Layout SLUU535A SEPTEMBER 2011 REVISED JANUARY 2022 Submit Document Feedback TPS40400 Buck Controller Evaluation Module User s Guide 25 Copyright 2022 Texas Inst...

Page 26: ...nasonic 1 C6 Capacitor ceramic 50 V X7R 10 680 pF 0603 std std 1 C7 Capacitor ceramic 50 V X7R 10 2 2 nF 0603 std std 1 C8 Capacitor ceramic 50 V X7R 10 820 pF 0603 std std 2 D1 D2 Diode LED red 2 1 V...

Page 27: ...sistor chip 1 16 W 1 4 99 k 0603 std std 3 R7 R11 R18 Resistor chip 1 16 W 1 49 9 0603 std std 1 R8 Resistor chip 1 16 W 1 2 74 k 0603 std std 1 U1 3 0 V to 20 V PMBus Synchronous Buck Controller QFN...

Page 28: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Page 29: ...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 in...

Page 30: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Page 31: ...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 electr...

Page 32: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 33: ...change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of thes...

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