MAX17559EVKIT#

Evaluates: MAX17559 MAX17559 Evaluation Kit General Description The MAX17559 EV kit is a proven design to evaluate the dual synchronous step-down regulator that provides independent 3.3V and 5V outputs capable of driving 8A and 15A loads from the 6V to 60V input-voltage range. Operating the two regulators 180° out-of-phase significantly reduces the peak input ripple current, allowing the use of smaller, less expensive components, while minimizing parts count. The EV kit features adjustable input undervoltage lockout, soft-start/stop time, and current-limit threshold, as well as selectable PWM/DCM modes, foldback/latchoff current limit, and independent open-drain PGOOD signals. By disabling channel 2, the evaluation kit is capable of operating from a lower input supply (4.5V to 60V), providing a single 3.3V output driving up to 15A. Benefits and Features ●● 6V to 60V Input Range ●● Output Rails: VOUT1: 3.3V/15A, VOUT2: 5V/8A ●● 150kHz Switching Frequency ●● Independent Enable Inputs ●● Independent Adjustable Soft-Start Time ●● Configurable Tracking Operation ●● Selectable PWM/DCM Modes of Operation ●● Fixed 180° Out-of-Phase Operation ●● Selectable Foldback/Latchoff Current Limit ●● Programmable Current-Limit Threshold ●● Independent PGOOD Outputs ●● Overcurrent, Overvoltage, and Overtemperature Protection Quick Start Required Equipment ●● MAX17559 EV kit ●● 4.5V to 60V, 15A DC power supply ●● Loads capable of sinking 8A and 15A ●● Two digital voltmeters (DVM) Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Set the power supply voltage to 24V and ensure that the DC power supply is disabled. 2) Set one load to 8A and the other load to 15A. Disable the loads in the case of electronic loads (leave the loads unconnected in case of resistor loads. Ensure that the resistor power ratings are high enough to dissipate the output voltages). 3) Connect the positive terminal of the power supply to the VIN connector and the negative terminal to the PGND connector, which is nearest to VIN connector. 4) Connect one digital voltmeter across the VOUT1 connector and the nearest PGND connector, with the positive terminal of the DVM connected to the VOUT1 connector. 5) Connect the other digital voltmeter across the VOUT2 connector and the nearest PGND connector, with the positive terminal of the DVM connected to the VOUT2 connector. ●● Proven PCB Layout 6) Verify that the shunts are connected between pins 1-2 of the JU1 and JU2 jumpers to select default settings of the EV kit ●● Fully Assembled and Tested 7) Turn on the DC power supply. 8) Verify that the digital voltmeters display the expected voltages (3.3V±1% on VOUT1 and 5V±1% on VOUT2). Ordering Information appears at end of data sheet. 9) Enable the electronic load (connect the load in the case of resistor load). 10) Verify that the voltmeters display the expected voltages (3.3V±1% on VOUT1 and 5V±1% on VOUT2). 19-7696; Rev 0; 6/15 MAX17559 Evaluation Kit Evaluates: MAX17559 Detailed Description of Hardware time of VOUT1 and VOUT2 are calculated based on the following equation: The MAX17559 EV Kit provides dual 3.3V/15A and 5V/8A outputs from a 6V to 60V input supply. By disabling channel 2, the EV kit provides a 3.3V output to drive up to 15A from a low 4.5V to 60V input voltage. The EV Kit is preset to 150kHz and operates 180° out-of-phase for optimum efficiency and component size. t= SS_ C SS _× The default soft-start/stop time of VOUT1 or VOUT2 is approximately 10.8ms at 68nF soft-start/stop capacitor. The EV kit implements an optional sub-circuit, R13–R18, R28, D7, and JU1, JU2 to enable/disable the output at a desired input UVLO, as well as soft-start/stop power sequence. Resistors R35 and R36 are selected different values to configure the EV kit operating in DCM/PWM mode and foldback/latchoff, current-limit mode, respectively. Enable/Undervoltage-Lockout Level (EN_) The device can be independently started up or shut down by manipulating the EN1 and EN2 pins. Leave EN_ unconnected for a default enable controller. Place shunts across pins 1-2 of JU1 and JU2 to enable each controller through the input UVLO formed by resistor-dividers. Connect a resistor-divider from VIN to EN_ and EN_ to GND to program the UVLO threshold for the corresponding controller. The EN_ pin can be programmed to 1.25V (typ) to detect UVLO at a desired input voltage to enable/ disable the corresponding controller with 50mV (typ) hysteresis. Place jumpers across pins 2-3 of JU1 and JU2 to disable the controllers. Table 1 shows all configurations of jumpers to enable/disable each of controllers. Configuring the Output Voltages (VOUT1, VOUT2) The device output voltages (VOUT1 and VOUT2) can be adjusted between 0.8V to 24V through sets of feedback resistor-dividers R19,R20 and R23,R24 by the following formula: = R20 R19 R23 = and R24 VOUT1 VOUT2 ( ( − 1) − 1) 0.8 0.8V 5µA 0.8 Please refer to MAX17559 IC data sheet to select the R19 and R23 values, changing compensation components, as well as output capacitors for setting new output voltages. Select R14 (R18 for OUT2) below 10K and calculate R13 (R17) based on the following equation: Soft-Start/Stop (SS_) R13 = The device offers an SS_ pin to connect a capacitor to GND to adjust the soft-start/stop time during startup and shutdown. An internal 5µA current source charges/discharges the capacitor at the SS_ pin, providing a linear ramping voltage for output voltage reference. The soft-start/stop R14 × (VINUVLO − 1.25) 1.25 where VINUVLO is the input voltage at which the controller is required to turn on. Table 1. Enable Control (JU1, JU2) JUMPER SHUNT POSITION EN MAX17558 OUTPUT Not installed Unconnected Enabled 1-2 Connected to the midpoint of input UVLO divider Enabled, UVLO level is set by the resistor divider from VIN to GND. 2-3 Connected to GND Disabled Not installed Unconnected Enabled 1-2 Connected to the mid-point of input UVLO divider Enabled, UVLO level is set by the resistor divider from VIN to GND. 2-3 Connected to GND Disabled JU1 JU2 www.maximintegrated.com Maxim Integrated │  2 MAX17559 Evaluation Kit Mode Selection (SKIP) The SKIP pin allows the user to select between the PWM and DCM modes of operation. Set R36 = 0Ω to select constant-frequency PWM mode operation. Choose 100kΩ to operate in DCM mode. Fixed Phase-Shift Between Controllers The two controllers of the dual switching regulator operate at a fixed 180° out-of-phase that interleaves the current pulses from the switches and reduces overlap time where they combine. The result is a significant reduction in total RMS input current, allowing for less expensive input capacitors to be used, reducing shielding requirements for EMI, and improving operating efficiency. Current-Limit Threshold Selection The EV kit includes current-limit resistors (R12 and R22) that can be modified to program current-limit thresholds for controllers 1 and 2. The peak current limit of each controller can be programmed independently by selecting different values for R12 and R22. Note that changing R12 and R22 affect the stability and current-sense signal across the current sense pins. Refer to the Current Limit Programming (ILIM_) and Current Sensing sections of MAX17559 IC data sheet for calculating R12, R22 and the current sense resistor values. www.maximintegrated.com Evaluates: MAX17559 Switching Frequency The EV kit is set to a 150kHz switching frequency by R14. Change the value of R14 to set a different switching frequency between 100kHz to 2200kHz. Use the following equation to calculate R14 when reconfiguring the switching frequency: R RT = (f SW + 133) 8.8 where fSW is in kHz and R14 is in kΩ. When reconfiguring the EV kit switching frequency, it might be necessary to change the values of the loopcompensation-network components. Refer to the Loop Compensation section of the MAX17559 IC data sheet for computing new compensation component values. Power-Good Outputs The EV kit provides power-good output test points PGOOD1 and PGOOD2 to monitor the PGOOD1 and PGOOD2 signals. The PGOOD signals are pulled-up to VCCINT by R26 and R27. PGOOD1 and PGOOD2 are high when VOUT1 and VOUT2, respectively, are above 90% and below 110% of their programmed output voltages. When VOUT1 and VOUT2 are below 90% or above 110% of their programmed output voltages, PGOOD1 and PGOOD2 are low. Maxim Integrated │  3 MAX17559 Evaluation Kit Evaluates: MAX17559 EV Kit Performance Report 90 90 80 80 70 70 60 50 VIN = 24V VIN = 36V VIN = 12V 40 20 0 5000 10000 0 15000 OUTPUT (mA) EFFICIENCY (%) 50 40 VIN = 36V VIN = 24V 20 2000 4000 6000 8000 COINCIDENT TRACKING AT STARTUP VIN = 24V, VOUT1 = 3.3V, IOUT1 = 15A, VOUT2 = 5V, IOUT2 = 8A toc10 VOUT2 1V/div VOUT2 1V/div VOUT1 1V/div VOUT1 1V/div IOUT1 5A/div IOUT1 5A/div IOUT2 5A/div IOUT2 5A/div fSW = 150kHz 10 0 0 OUTPUT (mA) STARTUP FROM ENABLE VIN = 24V, VOUT1 = 3.3V, IOUT1 = 15A, VOUT2 = 5V, IOUT2 = 8A toc08 60 VIN = 12V VIN = 24V FSW=150kHz 20 70 VIN = 36V 80 70 80 30 85 75 fSW = 150kHz VIN = 12V 90 90 OUTPUT (mA) EFFICIENCY vs. OUTPUT CURRENT VOUT = 5V, DCM MODE toc04 100 VIN = 36V 10 fSW = 150kHz 0 VIN = 24V 40 30 toc03 95 50 20 EFFICIENCY vs. OUTPUT CURRENT VOUT = 5V, PWM MODE 100 VIN = 12V 60 30 10 EFFICIENCY vs. OUTPUT CURRENT VOUT = 3.3V, DCM MODE toc02 100 EFFICIENCY (%) EFFICIENCY (%) 100 EFFICIENCY (%) EFFICIENCY vs. OUTPUT CURRENT VOUT = 3.3V, PWM MODE toc01 10 100 10ms/div 10ms/div 1000 OUTPUT (mA) STARTUP INTO PREBIASED OUTPUT VIN = 24V, VOUT1 = 3.3V, IOUT1 = 0A, VOUT2 = 5V, IOUT2 = 0A toc09 LOAD TRANSIENT RESPONSE VIN = 24V, VOUT1 = 3.3V, IOUT1 = 7.5A to 15A PWM MODE toc13 LOAD TRANSIENT RESPONSE VIN = 24V, VOUT2 = 5V, IOUT2 = 4A to 8A toc16 PWM MODE 1V/div 100mV/div AC-COUPLED VOUT1 100mV/div AC-COUPLED VOUT2 1V/div VOUT1 IOUT2 IOUT1 2V/div EN 10ms/div www.maximintegrated.com 5A/div 5A/div 400µs/div 400us/div Maxim Integrated │  4 MAX17559 Evaluation Kit Evaluates: MAX17559 EV Kit Performance Report (continued) 120 40 30 90 30 20 60 20 60 10 30 10 30 0 0 0 0 PHASE -10 GAIN -20 -30 -60 CROSSOVER FREQUENCY = 10 kHz PHASE MARGIN = 64.7◦ -40 -50 -30 1k 10k FREQUENCY (Hz) www.maximintegrated.com 100k GAIN (dB) 50 40 GAIN (dB) CLOSED-LOOP BODE PLOT VIN = 24V, VOUT = 3.3V, IOUT = 15A 150 PHASE MARGIN (°) 50 toc21 -90 -30 -120 -40 -150 -50 90 -30 GAIN -20 150 120 PHASE -10 toc22 -60 CROSSOVER FREQUENCY = 14.1 kHz PHASE MARGIN = 64.7◦ PHASE MARGIN (°) CLOSED-LOOP BODE PLOT VIN = 24V, VOUT = 5V, IOUT = 8A -90 -120 1k 10k 100k -150 FREQUENCY (Hz) Maxim Integrated │  5 MAX17559 Evaluation Kit Evaluates: MAX17559 Component Suppliers SUPPLIER WEBSITE Wurth Elektronik www.we-online.com Renesas Electronics am.renesas.com Murata Americas www.murata.com Panasonic Electronic Components www.panasonic.com/industrial Vishay Dale www.vishay.com TDK Corp. www.tdk.com Rubycon Corp. www.rubycon.com TT Electronics/Welwyn www.welwyn-tt.com Note: Indicate that you are using the MAX17559 when contacting these component suppliers. Component List, PCB Files and Schematic See the following links for component information, PCB files, and schematics: ●● MAX17559 EV BOM Ordering Information PART TYPE MAX17559EVKIT# EV kit #Denotes RoHS compliant. ●● MAX17559 EV PCB Files ●● MAX17559 EV Schematics www.maximintegrated.com Maxim Integrated │  6 MAX17559 Evaluation Kit Evaluates: MAX17559 Revision History REVISION NUMBER REVISION DATE 0 6/15 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2015 Maxim Integrated Products, Inc. │  7 6 5 OUT OUT PGOOD2 VCCINT VCCEXT IN OUT PGOOD1 IN EN2 1 2 IN EN1 IN VOUT2 IN VCC_CIRCLE 3 IN VOUT1 4 VCCEXT 7 VCCINT PGOOD1 8 VIN C28 D 0.015UF C29 R19 D R8 270PF 46.4K 2.2 R26 R21 VIN11 10K 5.11K + C26 R20 OUT 0.068UF 14.7K VCCINT 2 4 G S L1 3.1UH 2 2 6 GND PGND 21 7 EN1 DL2 18 8 EN2 LX2 16 4 N4 D 4 G S 1 2 3 1 2 3 4 1 A G S D2 15 14 13 12 11 10 9 C 0.068UF A IN 4 1 + 330UF 1 C18 10UF 10UF PGND6 R2 2 VOUT2 0.004 D 86.6K C33 R24 16.5K CS2- C7 4.7UF C8 4.7UF C9 4.7UF A C35 4.7UF OUT VCCINT OUT R23 CS2+ VIN C6 4.7UF VOUT2 2 N5 RJK0651DPB-00#J5 VOUT2 10K PGOOD2 EN2 1 PGND2 C17 5 IN OPEN G S CS2- CS2+ R28 B VOUT21 0 R27 0.033UF OUT 3 PGND3 VCCINT D4 R5 C30 R17 330UF OUT R25 C 0 470PF R18 C16 OUT C27 C31 OPEN 10UF C22 9.09K JU2 C15 C 0 A R31 VIN OPEN C14 1UF 1000PF 150 PGOOD2 C13 10UF 2K R10 A L2 6.8UH R33 C25 1 1 2 3 OPEN 3 R14 OPEN R7 D6 C32 N6 RJK0653DPB-00#J5 3 17 5 DH2 BST2 OPEN 2 C12 330UF D PGOOD2 SS2 COMP2 FB2 CS2+ JU1 CS2- R15 EN1 1 PGOOD2 C11 330UF 2 2 A 1 2 3 OPEN R13 C OPEN OUT C10 330UF PGND1 A R16 OPEN D7 D1 G S VIN B 1 3 RJK0653DPB-00#J5 D + N3 VOUT1 C RJK0653DPB-00#J5 0 R1 0.002 A D5 1 23 A SKIP A 2 DL1 VOUT11 1 2 3 0 C MAX17559 5 R6 0 0 R36 1 2 3 25 5 LX1 ILIMSEL 5 4 VCC_CIRCLE G S R29 R35 VOUT1 VCC_CIRCLE 0 182K VCCINT 4 CS1- RJK0651DPB-00#J5 D + 26 N2 RJK0651DPB-00#J5 D R4 CS1+ 2 DH1 ILIM2 IN C21 1UF C N1 2 3 A + 19 VCCINT 0 VCCINT D3 C 1 20 VCCEXT RT R30 1 24 R3 31.6K R12 PGND4 C34 4.7UF + BST1 C5 4.7UF 2 22 C4 4.7UF 2 IN C3 4.7UF 1 2 C1 220UF VCCEXT 1 27 PGOOD1 C2 4.7UF VIN 0 R11 VCCINT PGND5 5 28 ILIM1 CS1- PGOOD2 C19 0.1UF 5 29 SS1 1 1000PF VCC_CIRCLE C CS1+ PGOOD1 VIN C24 150 CS1- 32 EN2 EN1 10UF 30 182K COMP1 R22 31 R34 2K FB1 R9 IN GND C20 U1 CS1+ VIN 1 C23 2.2UF R32 OPEN PROJECT TITLE: 1 MAX17559 EVALUATION KIT 2 DRAWING TITLE: OPEN SIZE DATE: HARDWARE NUMBER: B - ENGINEER: - 05/19/2015 DRAWN BY: REV: - A TEMPLATE REV: SHEET 2 OF 2 1.5 8 7 6 5 4 3 2 1 BILL OF MATERIALS (BOM) Revision 5/15 Designation C32,C33 Qty Description 220uF,63V 1 Panasonic Electronic EEVFK1J221Q CAP CER 4.7UF 80V 10% X7R 1210 10 Murata GRM32ER71K475KE14L 330uF,9mΩ, 6.3V 5 Panasonic Electronic 6TPF330M9L 10uF,10V,X7R,1210,10% 4 Murata GRM32DR71A106KA01L 10uF,10V,X7R,1210,10% 0 Murata GRM32DR71A106KA01L CAP CER 0.1UF 100V 10% X7R 0603 1 Murata GRM188R72A104KA35D 10uF,10V,X7R,0805,10% 1 Murata GRM21BR71A106KE51L 1uF,10V(16V),10%,X7R 2 Murata GRM188R71A105KA61J Murata GRM188R71A225KE15 1nF,50V,1%,NP0 2 Murata GRM1885C1H102FA01J 68nF,25V,X7R,10% 2 Murata GRM188R71E683KA01 Murata GRM188R71E153KA01 270pF,50V,C0G,2%(5%) 1 Murata GRM1885C1H271GA01 (GRM1885C1H271JA01) 33nF,25V,X7R,10% 1 Murata GRM188R71E333KA01 470pF,50V,C0G,55 1 Murata GRM1885C1H471JA01 OPEN 0 R1 1 R2 1 R3,R4,R5,R6,R7, R29, R30, R31, R35, R36 10 R8 R11 R13,R14,R15,R16,R17,R18, R28, R32 R19 R20 R21 R23 R24 R25 R26, R27 R33, R34 1 1 0 1 1 1 1 1 1 2 2 L1 1 L2 1 C1 C2-C9, C34, C35 C10,C11,C12, C15, C16 C13,C14,C17, C18 C18 C19 C20 C21,C22 C24,C25 C26,C27 C29 C30 C31 2mΩ, 1W,1% Rohm Semiconducto PMR25HZPFV2L00 4mΩ, 1W,1% Rohm Semiconducto PMR25HZPFV4L00 0Ω 2.2Ω 31.6KΩ OPEN 46.4KΩ 14.7KΩ 5.11KΩ 86.6KΩ 16.5KΩ 9.09KΩ 10KΩ 2KΩ 3.1uH, 15%,26A,2.09mΩ Wurth Electronics 7443630310 6.8uH,20%,18.5A,4.1mΩ Wurth Electronics 7443556680 N1,N2,N5 3 N3, N4, N6 3 D1,D2 2 D3,D4 2 D5,D6 D7 0 0 U1 1 VIN,PGND,VOUT1,PGND,VOUT2,EN1,EN2,PGOO 11 JU1, JU2 6 VIN,PGND,VOUT1,PGND,VOUT2,PGND 2 CONN JUMPER SHORTING TIN 2 60V,25A,13mΩ Renesas RJK0651DPB-00#J5 60V,45A,4.5mΩ Renesas RJK0653DPB-00#J5 DIODE SCHOTTKY 60V 5A TO277A Vishay Semiconductor SS5P6-M3/86A DIODE SCHOTTKY 100V 250MA NXP Semiconductors BAT46WJ,115 Open Open MAX17559 Maxim MAX17559ACJ+ 20G tinned copper Bus wire formed into “U” shaped loops (0.25” off the PC board) 3-pin header ( 0.1” pitch) Sullins PREC003SAAN-RC Non -Insulate Jack Keystone Electronics 575-4 Shunts, 0.1" Pitch Sullins STC02SYAN This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17559_EVKIT_A HARDWARE NUMBER: DATE: 05/28/2015 ODB++/GERBER: SILK_TOP PGOOD1 DESIGNER: VCCINT ENGINEER: L1 MAX17559 EVKIT VOUT1 3.3V 1-888-629-4642 @15A www.maximintegrated.com R29 REV-A 05/15 SJ R4 C12 C11 C10 R1 C14 C13 D1 N4 N1 N3 N2 VIN D3 R6 C21 R34 R22 R21 C29 R19 R20 C28 C26 PGND C24 C35 R3 U1 C9 R9 C32 C23 C27 R23 R24 R25 C31 PGND C22 N6 R5 N5 C1 C15 C17 C16 C18 C6 D2 C30 R2 VOUT2 PGND JU1 JU2 VCCEXT PGOOD2 EN2 GND L2 EN1 5V @8A C7 D4 R33 R7 R31 R10 C8 C20 C25 C33 40V max. C19 R30 R32 R11 R12 1/6 This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17559_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 05/28/2015 ODB++/GERBER: 2/6 TOP This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17559_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 05/28/2015 ODB++/GERBER: 3/6 SGND This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17559_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 05/28/2015 ODB++/GERBER: 4/6 PGND This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17559_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 05/28/2015 ODB++/GERBER: 5/6 BOTTOM This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX17559_EVKIT_A HARDWARE NUMBER: ENGINEER: DESIGNER: DATE: 05/28/2015 ODB++/GERBER: SILK_BOT R26 C34 C5 D5 R36 R35 C4 C3 D6 R27 C2 R18 R28 R17 D7 R15 R8 R14 R13 R16 6/6