LM5122EVM-2PH

LM5122EVM-2PH Evaluation Module User's Guide Literature Number: SNVU205 APRIL 2013 Contents 1 2 3 Introduction ........................................................................................................................ 4 Features and Electrical Performance ..................................................................................... 4 Test Points ......................................................................................................................... 4 4 Test Equipment 7 8 9 ............................................................................................................... 4 ................................................................................................................... 5 4.1 Power Supply ............................................................................................................ 5 4.2 Electronic Load .......................................................................................................... 5 4.3 Meters ..................................................................................................................... 5 4.4 Oscilloscope .............................................................................................................. 5 Test Setup and Procedure .................................................................................................... 5 5.1 Precaution & Wire Gauge .............................................................................................. 5 5.2 Test Setup ................................................................................................................ 6 5.3 Quick Test Procedure ................................................................................................... 6 Performance Curves ............................................................................................................ 6 6.1 Efficiency ................................................................................................................. 6 6.2 Load Transient ........................................................................................................... 7 6.3 Interleaving ............................................................................................................... 7 6.4 Light Load Operations .................................................................................................. 8 6.5 Startup .................................................................................................................... 9 6.6 Loop Response .......................................................................................................... 9 Schematic ......................................................................................................................... 10 Layout .............................................................................................................................. 12 Bill of Materials ................................................................................................................. 15 2 Table of Contents 3.1 5 6 Test Points SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated www.ti.com List of Figures 1 Connection Diagram ........................................................................................................ 5 2 Efficiency ..................................................................................................................... 6 3 Load Transient 4 Interleaving................................................................................................................... 7 5 Pulse Skip .................................................................................................................... 8 6 Skip Cycle .................................................................................................................... 8 7 Forced PWM ................................................................................................................. 8 8 Startup ........................................................................................................................ 9 9 Loop Response.............................................................................................................. 9 10 Schematic (Power Block) ................................................................................................. 10 11 Schematic (Control Block) ................................................................................................ 11 12 Top Silk (Top View) ....................................................................................................... 12 13 Bottom Silk (X-Ray View) 14 Top Copper (Top View) ................................................................................................... 13 15 Mid1 Copper (X-Ray View) ............................................................................................... 13 16 Mid2 Copper (X-Ray View) ............................................................................................... 14 17 Bottom Copper (X-Ray View) ............................................................................................ 14 .............................................................................................................. ................................................................................................ 7 12 List of Tables 1 Electrical Performance Specifications .................................................................................... 4 2 Pin Descriptions ............................................................................................................. 4 3 Bill of Materials............................................................................................................. 15 SNVU205 – APRIL 2013 Submit Documentation Feedback List of Figures Copyright © 2013, Texas Instruments Incorporated 3 User's Guide SNVU205 – APRIL 2013 LM5122EVM-2PH Evaluation Module 1 Introduction The LM5122EVM-2PH evaluation module (EVM) provides the design engineer with a fully functional dual phase synchronous boost converter to evaluate the Texas Instruments LM5122 synchronous boost controller device. The EVM provides 28 V output at up to 7 A current from a 9 V to 20 V input. The EVM is designed to start up from a single power supply without any additional bias voltage. 2 Features and Electrical Performance • • • • • 9 V to 20 V input voltage range 28 V target output voltage Up to 7 A output current 250 kHz typical switching frequency Dual phase interleaved operation Table 1. Electrical Performance Specifications PARAMETER TEST CONDITIONS MIN TYP MAX 9 12 20 UNITS Input Characteristics Input Voltage Input Current VSUPPLY = 12 V, ILOAD = 7A 17 V A Output Characteristics Output Voltage ILOAD = 7A 27.02 28 Output Current 28.98 V 7 A System Characteristics Switching Frequency Full Load Efficiency 3 Test Points 3.1 Test Points 250 VSUPPLY = 12 V 96% VSUPPLY = 20 V 98% kHz Table 2. Pin Descriptions PIN NAME 4 DESCRIPTIONS TP7, TP8 Power Ground TP5, TP9, TP10 Analog Ground TP6 UVLO J1#1 External Synchronization Pulse Positive Input J1#2 External Synchronization Pulse Negative Input LM5122EVM-2PH Evaluation Module SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Test Equipment www.ti.com 4 Test Equipment 4.1 Power Supply Power Supply should be capable of 20 V / 25 A, current monitoring and remote sensing. 4.2 Electronic Load Electronic load should be capable of 32 V / 7 A. Use Constant Current (CC) mode. 4.3 Meters One current meter is required to measure input current accurately. Maximum current rating of the meter should be carefully considered. Input current can be as high as 25 A at full load current and minimum input voltage. Output voltage is monitored by a voltage meter which should be capable of monitoring up to 32 V. 4.4 Oscilloscope Oscilloscope and 10x probe with at least 20 MHz bandwidth are required. 5 Test Setup and Procedure Oscilloscope Voltage Meter Electronic Load - - -s + +s + Power Supply V COM A COM Ampere Meter Figure 1. Connection Diagram 5.1 Precaution & Wire Gauge Prolonged operation with low input voltage at full power will cause heating of the MOSFETs. A fan with a minimum of 200LFM should be always provided. Wire gauge for the input power supply should be 6-8 AWG minimum and no longer than 1 foot each for VIN and GND. Wire gauge for the output electronic load should be 12 AWG minimum and no longer than 1 foot each for VOUT and GND. SNVU205 – APRIL 2013 Submit Documentation Feedback LM5122EVM-2PH Evaluation Module Copyright © 2013, Texas Instruments Incorporated 5 Performance Curves 5.2 www.ti.com Test Setup 5.2.1 Power Supply Connect the power supply’s positive terminal (+) to ‘A’ terminal of ampere meter and negative terminal (-) to TP4 GND. Connect the power supply’s positive remote sense terminal to TP2 VIN and negative remote sense terminal to TP4 GND. 5.2.2 Meter Connect ‘COM’ terminal of ampere meter to TP2 VIN. Double check ‘A’ terminal is connected to the power supply’s positive terminal. Voltage meter is used to measure output voltage. Connect positive terminal (V) of the voltage meter to TP1 VOUT and negative terminal (COM) of the voltage meter to TP3 GND. 5.2.3 Load Connect electronic load’s positive terminal (+) to TP1 VOUT and negative terminal (-) to TP3 GND. 5.3 Quick Test Procedure 5.3.1 • • • • Startup Set load current to 0 A and turn the load on Set power supply current limit to 25 A Turn on the power supply and increase voltage slowly up to 20 V Increase load current slowly up to 7 A 5.3.2 Shutdown • Turn off the load • Decrease the input voltage down to 0 V • Turn on the load and discharge output capacitor 6 Performance Curves The following curves are presented for reference, the actual field data may differ from these curves. Actual performance data can be affected by measurement techniques, equipment setting and environmental variables. 6.1 Efficiency 100 EFFICIENCY [%] 95 VSUPPPLY = 20V VSUPPLY = 9V 90 VSUPPLY = 12V 85 FSW = 250 kHz VOUT = 28V 80 0 2 4 6 LOAD CURRENT [A] 8 C001 Figure 2. Efficiency 6 LM5122EVM-2PH Evaluation Module SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Performance Curves www.ti.com 6.2 Load Transient VSUPPLY = 12 V, 3.5 A to 7 A and 7 A to 3.5 A load transient C1: VOUT Figure 3. Load Transient 6.3 Interleaving VSUPPLY = 12 V C1: SW1, C2: SW2 Figure 4. Interleaving SNVU205 – APRIL 2013 Submit Documentation Feedback LM5122EVM-2PH Evaluation Module Copyright © 2013, Texas Instruments Incorporated 7 Performance Curves 6.4 www.ti.com Light Load Operations Forced PWM (FPWM) and Skip Cycle mode can be configured by controlling MODE pin voltage. VSUPPLY = 12 V, ILOAD = 0 A C1:SW1 Figure 5. Pulse Skip C1: SW1 Figure 6. Skip Cycle C1: SW1 Figure 7. Forced PWM 8 LM5122EVM-2PH Evaluation Module SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Performance Curves www.ti.com 6.5 Startup VSUPPLY = 12 V, ILOAD = 0 A C1: VOUT, C2: SS, C4: VSUPPLY Figure 8. Startup Loop Response 40 180 GAIN [dB] 30 PHASE VSUPPLY = 12V ILOAD = 7.0A 135 20 90 10 45 0 0 -10 GAIN PHASE [°] 6.6 -45 -20 -90 -30 -135 -40 100 1000 10000 FREQUENCY [Hz] -180 100000 C002 Figure 9. Loop Response SNVU205 – APRIL 2013 Submit Documentation Feedback LM5122EVM-2PH Evaluation Module Copyright © 2013, Texas Instruments Incorporated 9 Schematic 7 www.ti.com Schematic Figure 10. Schematic (Power Block) 10 LM5122EVM-2PH Evaluation Module SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Schematic www.ti.com Figure 11. Schematic (Control Block) SNVU205 – APRIL 2013 Submit Documentation Feedback LM5122EVM-2PH Evaluation Module Copyright © 2013, Texas Instruments Incorporated 11 Layout 8 www.ti.com Layout The LM5122 2-phase EVM has been designed using a 4-layer board. Most of components are on the top to allow the user to easily view, probe, and evaluate the LM5122 device. Figure 12. Top Silk (Top View) Figure 13. Bottom Silk (X-Ray View) 12 LM5122EVM-2PH Evaluation Module SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Layout www.ti.com Figure 14. Top Copper (Top View) Figure 15. Mid1 Copper (X-Ray View) SNVU205 – APRIL 2013 Submit Documentation Feedback LM5122EVM-2PH Evaluation Module Copyright © 2013, Texas Instruments Incorporated 13 Layout www.ti.com Figure 16. Mid2 Copper (X-Ray View) Figure 17. Bottom Copper (X-Ray View) 14 LM5122EVM-2PH Evaluation Module SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Bill of Materials www.ti.com 9 Bill of Materials The EVM components are list according to the schematic shown in Figure 10 and Figure 11 . Table 3. Bill of Materials REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER PART NUMBER QTY C1, C13 CAP, CER, 470 pF, 100 V, +/-5%, C0G, 0805 MURATA GRM2165C2A471JA01D 2 C2, C3, C12, C14, C15 CAP CER 3.3 uF 50 V 10% X7R 1206 TDK C3216X7R1H335K160AC 5 C4, C5, C6, C16, C17, C18 CAP CER 10 uF 35 V 10% X7R 1206 Taiyo Yuden GMK316AB7106KL 6 C7 CAP, CER, 1 uF, 50 V, +/-10%, X7R, 0805 MURATA GRM21BR71H105KA12L 1 C8, C9, C10, C11 CAP ALUM 330 uF 35 V 20% SMD Panasonic EEE-FP1V331AP 4 C19, C20, C29 CAP, CER, 0.1 uF, 25 V, +/-10%, X7R, 0603 MURATA GRM188R71E104KA01D 3 C21, C22, C25, C26 CAP, CER, 100 pF, 50 V, +/-5%, C0G/NP0, 0603 MURATA GRM1885C1H101JA01D 4 C23, C24 CAP, CER, 4.7 uF, 16 V, +/-10%, X7R, 0805 MURATA GRM21BR71C475KA73L 2 C27, C28, C30 CAP, CER, 0.47 uF, 25 V, +/-10%, X7R, 0603 MURATA GRM188R71E474KA12D 3 C31 CAP, CER, 330 pF, 50 V, +/-10%, X7R, 0603 KEMET C0603C331K5RACTU 1 C32 CAP, CER, 0.022 uF, 50 V, +/-10%, X7R, KEMET 0603 C0603C223K5RACTU 1 R1, R7 RES 8.2 Ω 3/4W 5% 2010 SMD Vishay CRCW20108R20JNEF 2 R2, R8 RES, 0.004 Ω, 3 W, 1%, 3015, WIDE Susumu KRL7638-C-R004-F-T1 2 R3, R4, R9, R10 RES, 100 Ω, 1%, 0.1 W, 0603 Vishay CRCW0603100RFKEA 4 R5, R6, R11, R12, R15, R16, R26, R28, R35, R36 RES, 0 Ω, 5%, 0.1 W, 0603 Panasonic ERJ-3GEY0R00V 10 R19, R33 RES, 49.9k Ω, 1%, 0.1 W, 0603 Vishay CRCW060349K9FKEA 2 R20, R21 RES, 3.3 Ω, 5%, 0.1 W, 0603 Vishay CRCW06033R30JNEA 2 R24 RES, 8.06k Ω, 1%, 0.1 W, 0603 Vishay CRCW06038K06FKEA 1 R25, R27 RES, 78.7k Ω, 1%, 0.1 W, 0603 Vishay CRCW060378K7FKEA 2 R29 RES, 36.5k Ω, 1%, 0.1 W, 0603 Vishay CRCW060336K5FKEA 1 R31 RES, 59.0k Ω, 1%, 0.1 W, 0603 Vishay CRCW060359K0FKEA 1 R32 RES, 2.26k Ω, 1%, 0.1 W, 0603 Vishay CRCW06032K26FKEA 1 R34 RES, 576 Ω, 1%, 0.125 W, 0805 Vishay CRCW0805576RFKEA 1 D1, D2 Diode, Schottky, 60 V, 1 A, SOD-123F NXP PMEG6010CEH 2 Q1, Q2, Q3, Q4 MOSFET N-CH 40 V 100 A LFPAK NXP PSMN4R0-40YS 4 MOSFET N-CH 40 V 100 A SON 5x6 Texas Instruments CSD18501Q5A L1, L2 SMD Flat Wire WE-HCI, L Ω = 10.0 µH WURTH 74435561100 2 TP1, TP2, TP3, TP4 Terminal screw, vertical, snap-in Keystone 7693 4 TP5, TP7, TP8 Test Point, TH, Multipurpose, Black Keystone 5011 3 TP6 Test Point, TH, Miniature, White Keystone 5002 1 TP9, TP10 Test Point, TH, Miniature, Black Keystone 5001 2 H1, H2, H5, H6 Standoff, Hex, 0.5"L #4-40 Nylon Keystone 1902C 4 H3, H4, H7, H8 Machine Screw, Round, #4-40 x 1/4, Nylon B&F NY PMS 440 0025 PH 4 J1 Header, TH, 100mil, 2x1, Gold plated SAMTEC TSW-102-07-G-S 1 U1, U2 Synchronous Boost Controller Texas Instruments LM5122MH 2 SNVU205 – APRIL 2013 Submit Documentation Feedback ALT LM5122EVM-2PH Evaluation Module Copyright © 2013, Texas Instruments Incorporated 15 Bill of Materials 16 www.ti.com LM5122EVM-2PH Evaluation Module SNVU205 – APRIL 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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