Application Note 1877 ZL8800-2CH-DEMO1Z Demonstration Board User Guide Target Specifications The ZL8800 is a digital power conversion and management IC that combines an efficient step-down DC/DC converter with key power and thermal management functions in a single package. The ZL8800 incorporates compensation-free ChargeMode™ control to achieve single-cycle transient response. • VIN = 12V • VOUT = 1.2V/30A max and 1.0V/30A max • fSW = 512kHz The ZL8800-2CH-DEMO1Z demonstration board is a 6-layer board demonstrating 2 independent 30A synchronous buck converters. Sequencing, tracking, margining, plus other features can be evaluated using this board. • Efficiency: 91% at 20A • Output Ripple: ±1% • Dynamic response: ±1% (50% to 100% to 50% load step, di/dt = 10A/µs) A USB to PMBus™ adapter board is used to connect the demonstration board to a PC. The PMBus command set is accessed by using the Intersil PowerNavigator™ evaluation software from a PC running Microsoft Windows. • Board temperature: +25°C Functional Description Key Features The ZL8800-2CH-DEMO1Z provides all circuitry required to demonstrate the features of the ZL8800. The ZL8800-2CH-DEMO1Z has a functionally-optimized ZL8800 circuit layout that allows efficient operation up to the maximum output current. • 2 independent 30A synchronous buck converters with compensation-free ChargeMode control • Designed to be easy to use and modify. Optimized for small circuit footprint and dynamic response A majority of the features of the ZL8800, such as compensation-free ChargeMode control, soft-start delay and ramp times, supply sequencing, voltage tracking and voltage margining are available on this demonstration board. For voltage tracking and sequencing demonstration, the board can be connected to any other Intersil demonstration board that supports the Digital-DC™ (DDC) bus. • Configurable through PMBus • VIN range of 6.5V to 14V, VOUT adjustable from 0.54 to 5.5V • Enable switches and power-good indicators Ordering Information PART NUMBER ZL8800-2CH-DEMO1Z DESCRIPTION Figure 1 shows a simplified schematic diagram of the ZL8800-2CH-DEMO1Z board. ZL8800 Demonstration Kit (EVB, USB Adapter, Cable) VIN 4.5V TO 14V Vsw VDRV VDD ZL8800 VIN VDD PW M PWMH1 PWMH0 PW M EN PWML1 PWML0 EN DrMOS BST DrMOS VOUT1 0.54V TO 5.5V VDD VIN VDRV BST Vsw VOUT0 0.54V TO 5.5V GND GND ISENA1 ISENA0 ISENB1 ISENB0 VSENP1 VSENP0 VSENN1 VSENN0 INTER-DEVICE COMMUNICATION PMBus DDC SDA SCL SALRT GND EN0 EN1 PG0 PG1 CONTROL AND STATUS FIGURE 1. ZL8800-2CH-DEMO1Z SIMPLIFIED SCHEMATIC December 19, 2014 AN1877.2 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013, 2014. All Rights Reserved Intersil (and design), ChargeMode, PowerNavigator and Digital-DC are trademarks owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. Application Note 1877 The hardware enable function is controlled by toggle switches on the ZL8800-2CH-DEMO1Z board. The power-good (PG) LEDs indicate the correct state of PG when external power is applied to the ZL8800-2CH-DEMO1Z board and the corresponding output is functioning properly. The right angle headers at opposite ends of the board are for connecting a USB to PMBus adapter board or for daisy chaining multiple demonstration boards together to build multioutput configurations. Figures 2 and 3 show the detailed demonstration circuit. Figure 2 shows the ZL8800 IC with its minimal component count to realize a 30A output on each buck converter. Figure 3 has interface circuitry unique to the demonstration board that is not typically contained in a user’s application circuit. Figures 4 through 10 show typical performance data and Figures 15 through 22 demonstrate the PCB board layout, which include the board fabrication notes. The default configuration file is shown on page 6, and the Bill of Materials (BOM) is included for reference beginning on page 5. Quick Start Guide Stand-Alone Operation 1. Set ENABLE switch to “DISABLE”. 2. Apply load to VOUT0 and/or VOUT1 . 3. Connect the USB to PMBus adapter board to J8 (labeled “DONGLE”) of ZL8800-2CH-DEMO1Z. 4. Connect supplied USB cable from computer to USB to PMBus adapter board. 5. Connect power supply to VIN (supply turned off). 6. Turn power supply on. 7. Set ENABLE switch to “ENABLE”. 8. Monitor ZL8800-2CH-DEMO1Z board operation using an oscilloscope. USB (PMBus) Operation References 1. Set ENABLE switch to “DISABLE”. ZL8800 Datasheet, “Dual Channel/Dual Phase PMBus™ ChargeMode Control DC/DC Digital Controller” 3. Connect power supply to VIN (supply turned off). Operation 5. Connect USB to PMBus adapter board to J8 of ZL8800-2CH-DEMO1Z. PMBus Operation 6. Connect supplied USB cable from computer to USB to PMBus adapter board. 2. Apply load to VOUT and/or VOUT1. The ZL8800 utilizes the PMBus protocol. The PMBus functionality can be controlled via USB from a PC running the PowerNavigator evaluation software in a Windows XP, Windows 7 or Windows 8 operating systems. 4. Turn power supply on. Install the PowerNavigator evaluation software from the following Intersil website: http://www.intersil.com/powernavigator.html. Install the evaluation software from the following Intersil website: http://www.intersil.com/powernavigator.html 7. Set ENABLE switch to “ENABLE”. For board operation, connect the included USB-to-PMBus adapter board to J8 of the ZL8800-2CH-DEMO1Z board labeled “DONGLE”. Connect the desired load and an appropriate power supply to the input and connect the included USB cable to the PC running the PowerNavigator evaluation software. Place the ENABLE switches in “DISABLE” and turn on the power. 9. Test the ZL8800-2CH-DEMO1Z operation using an oscilloscope and the evaluation software. 8. Monitor and configure the ZL8800-2CH-DEMO1Z board using PMBus commands in the evaluation software. The evaluation software allows modification of all ZL8800 PMBus parameters. The ZL8800 device on the board has been preconfigured as described in this document, but the user may modify the operating parameters through the evaluation software or by loading a predefined set-up from a configuration file. The ENABLE switch can then be moved to “ENABLE” and the ZL8800-2CH-DEMO1Z board can be tested. Alternately, the PMBus ON_OFF_CONFIG and OPERATION commands may be used from the PowerNavigator GUI. Submit Document Feedback 2 AN1877.2 December 19, 2014 Submit Document Feedback ZL8800-2CH-DEMO1Z Board Schematics 3 Application Note 1877 AN1877.2 December 19, 2014 FIGURE 2. APPLICATION CIRCUIT Submit Document Feedback ZL8800-2CH-DEMO1Z Board Schematics (Continued) 4 Application Note 1877 AN1877.2 December 19, 2014 FIGURE 3. ZL8800-2CH-DEMO1Z AUXILIARY CIRCUITRY Application Note 1877 ZL8800-2CH-DEMO1Z Bill of Materials QTY REFERENCE VALUE TOL RATING TYPE 1 U2 ZL8800 - 14V - 8 C1, C2, C3, C5, C6, C7, C8, C9 100µF 20% 6.3V X5R 4 C4, C10, C11, C12 470µF 20% 2V AL PCB FOOTPRINT MFR PART NUMBER MLF44_7X7_XX Intersil ZL8800ALAFTK SM1210 Taiyo Yuden JMK325BJ107MY-T SM7343P Panasonic EEF-SX0D471E4 4 C13, C20, C29, C16 10µF 10% 10V X5R SM0805 Taiyo Yuden LMK212B7106KG-TD 9 C18, C22, C23, C24, C25, C30, C31, C32, C33 22µF 20% 16V X5R SM1206 Murata GRM31CR61C226ME15L 1 C17 330µ 20% 16V 4 C19, C26, C28, C35 1µF 10% 16V X7R SM0603 TDK C1608X7R1C105K 2 C27, C36 100p 5% 50V NPO SM0402_WSS Murata GRM1555C1H101JZ01D 6 C38, C39, C41, C37, C21, C34 10µ 20% 16V X5R SM0603 Taiyo Yuden EMK107BBJ106MA-T X5R SM0805 AL POLY SM_CAP_10.5X10.5 United Chemi APXA160ARA331MJC0G 1 C40 2.2µ 10% 25V 2 L1, L2 0.27µH - 35.5A Murata GRM21BR71E225KA73L FERRITE IND_SLC1175 Coil Craft SLC1175-271ME_ 2 Q3, Q6 FDMF5821 - 60A/20V DR MOS PQFN31_5X5_P5S Fairchild FDMF5821DC 2 Q2, Q4 2N3904 - 40V ON Semi MMBT3904LT1G 2 R1, R26 100k 1% 100mW THK FILM SM0603 Panasonic ERJ-3EKF1003V 1 R2 6.65k 1% 100mW THK FILM SM0603 Panasonic ERJ-3EKF6651V 2 R3, R7 100 1% 100mW THK FILM SM0805 Panasonic ERJ-6ENF1000V 2 R9, R11 1 5% 100mW THK FILM SM0603 Rohm MCR03EZPJ1R0 2 R10, R12 1.40k 1% 100mW THK FILM SM0603 Panasonic ERJ-3EKF1401V 1 R18 28.7k 1% 100mW THK FILM SM0402 Panasonic ERJ-3EKF2872V 1 R25 31.6k 1% 100mW THK FILM SM0603 Panasonic ERJ-3EKF3162V 1 R27 147k 1% 100mW THK FILM SM0603 Panasonic ERJ-3EKF1473V 2 R14, R13 3.3Ω 5% 100mW THK FILM SM0603 Panasonic ERJ-3GEYJ3R3V 2 R15, R16 30k 5% 100mW THK FILM SM0603 Panasonic ERJ-3GEYJ303V Keystone 5000 NPN SOT-23 DEMONSTRATION BOARD SPECIFIC AUXILIARY PARTS BILL OF MATERIALS 1 VDD Terminal - Red Test Point TP_036H_SSREF 1 GND Terminal 2 D3, D4 GREEN - Black Test Point TP_036H_SSREF - 2V, 20mA 2 EN1, EN0 SW_SPDT - - 4 J1, J2, J105, J106 2 POS - - 1 J6 Not Used - - - - - - 2 J8, J9 Header - - RA HDRM3DUALRA Samtec TSW-103-08-T-D-RA 2 J10, J11 Socket - - RA HDRF3DUALRA Samtec SSQ-103-02-T-D-RA 4 J101, J102, J103, J104 Terminal - - - JACK_F_.175 Burndy KPA8CTP 2 P2 Banana Jack - 15A - JACK_F_NI_2P 2 R30, R31 392 1% 100mW 1 C15 22µF 20% 16V 5 R4, R5, R6, R32, R35 10.0k 1% 63mW THK FILM SM0603 THK FILM SM0603 2 R33, R34 100k 1% 100mW 3 R24, R28, R29 Not Used - - 1 R8 4.75k 1% 100mW 1 C14 10µF 10% 10V Submit Document Feedback 5 LED SM0805 PCB VERT SW_TOG_SPDT VERT SIP2/100 THK FILM SM0603 X5R - SM1206 SM0603 THK FILM SM0603 X5R SM1206 Keystone 5001 Chicago Mini CMD17-21VGC/TR8 NKK G12AP Samtec TSW-102-07-L-S Emerson 108-0740-001 Yageo RC0603FR-07393RL Murata GRM31CR61C226ME15L Panasonic ERJ-2RKF1002X Panasonic ERJ-3EKF1003V - - Panasonic ERJ-2RKF4751X Murata GRM31CR61C106ME15L AN1877.2 December 19, 2014 Application Note 1877 Configuration File The following text is loaded into the ZL8800 device on the ZL8800-2CH-DEMO1Z as default settings. Each PMBus command is loaded via the PowerNavigator software. The # symbol is used for a comment line. # Initialize device to factory settings # PAGE 0 commands PAGE 0x0 # PAGE 1 commands PAGE 0x1 STORE_USER_ALL ### End User Store RESTORE_FACTORY STORE_DEFAULT_ALL STORE_USER_ALL ### Begin Default Store RESTORE_DEFAULT_ALL # Global commands # PAGE 0 commands PAGE VOUT_MAX IOUT_CAL_GAIN IOUT_OC_FAULT_LIMIT IOUT_UC_FAULT_LIMIT USER_CONFIG INDUCTOR TEMPCO_CONFIG DDC_GROUP IOUT_AVG_OC_FAULT_LIMIT IOUT_AVG_UC_FAULT_LIMIT MFR_VMON_OV_FAULT_LIMIT MFR_VMON_UV_FAULT_LIMIT 0x0 0x4000 0xb11e 0xe370 0xe490 0x786 0xb114 0xa7 0x0 0xe230 0xe5d0 0xcb00 0xca00 # PAGE 1 commands PAGE VOUT_COMMAND VOUT_MAX VOUT_MARGIN_HIGH VOUT_MARGIN_LOW IOUT_CAL_GAIN VOUT_OV_FAULT_LIMIT VOUT_UV_FAULT_LIMIT IOUT_OC_FAULT_LIMIT IOUT_UC_FAULT_LIMIT POWER_GOOD_ON USER_CONFIG INDUCTOR TEMPCO_CONFIG IOUT_AVG_OC_FAULT_LIMIT IOUT_AVG_UC_FAULT_LIMIT MFR_VMON_OV_FAULT_LIMIT MFR_VMON_UV_FAULT_LIMIT 0x1 0x2000 0x4000 0x219a 0x1e66 0xb11e 0x235c 0x1ca4 0xe370 0xe490 0x1ccd 0x7a6 0xb114 0xa7 0xe230 0xe5d0 0xcb00 0xca00 #2V # 0.279 mV/A # 55 A # -55 A # 0.27 uH # 35 A # -35 A #6V #4V #1V #2V # 1.05 V # 0.95 V # 0.279 mV/A # 1.105 V # 0.895 V # 55 A # -55 A # 0.9 V # 0.27 uH # 35 A # -35 A #6V #4V STORE_DEFAULT_ALL ### End Default Store ### Begin User Store RESTORE_USER_ALL # Global commands Submit Document Feedback 6 AN1877.2 December 19, 2014 Application Note 1877 Measured Data The following data was acquired using a ZL8800-2CH-DEMO1Z Rev B demonstration board. MEASURED OUTPUT CURRENT (A) 35 30 MEASURED 25 IDEAL 20 15 10 5 0 0 5 10 15 20 25 30 35 ACTUAL OUTPUT CURRENT (A) FIGURE 4. OUTPUT CURRENT MEASUREMENT ACCURACY 100 100 90 90 80 VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V 70 60 EFFICIENCY (%) EFFICIENCY (%) 80 VOUT = 1V VOUT = 0.8V 50 60 50 40 40 30 30 20 0 5 10 15 20 25 20 30 VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V VOUT = 1V VOUT = 0.8V 70 0 5 LOAD CURRENT (A) 100 90 90 EFFICIENCY (%) EFFICIENCY (%) 80 VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V VOUT = 1V VOUT = 0.8V 60 50 50 30 30 5 10 15 20 25 LOAD CURRENT (A) FIGURE 7. EFFICIENCY, VIN = 12V, fSW = 400kHz Submit Document Feedback 7 30 30 VOUT = 1V VOUT = 0.8V 60 40 0 25 VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V 70 40 20 20 FIGURE 6. EFFICIENCY, VIN = 5V, fSW = 300kHz 100 70 15 LOAD CURRENT (A) FIGURE 5. EFFICIENCY, VIN = 12V, fSW = 300kHz 80 10 20 0 5 10 15 20 25 30 LOAD CURRENT (A) FIGURE 8. EFFICIENCY, VIN = 5V, fSW = 400kHz AN1877.2 December 19, 2014 Application Note 1877 Measured Data The following data was acquired using a ZL8800-2CH-DEMO1Z Rev B demonstration board. (Continued) 100 100 90 90 80 VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V 70 60 EFFICIENCY (%) EFFICIENCY (%) 80 VOUT = 1V VOUT = 0.8V 50 50 40 30 30 0 5 10 15 20 25 30 LOAD CURRENT (A) VOUT = 1V VOUT = 0.8V 60 40 20 VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V 70 20 0 5 10 15 20 25 FIGURE 9. EFFICIENCY, VIN = 12V, fSW = 516kHz FIGURE 10. EFFICIENCY, VIN = 5V, f SW = 516kHz FIGURE 11. RAMP UP FIGURE 12. RAMP DOWN FIGURE 13. STEP RESPONSE, 10A TO 20A AT 5A/µs, ASCR = 1000 TOTAL DEVIATION WINDOW 25mV = 2.5% FIGURE 14. STEP RESPONSE, 10A TO 20A AT 5A/µs, ASCR = 400 TOTAL DEVIATION WINDOW 50mV = 5% Submit Document Feedback 8 30 LOAD CURRENT (A) AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout FIGURE 15. PCB - TOP ASSEMBLY Submit Document Feedback 9 AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout (Continued) FIGURE 16. PCB - TOP LAYER Submit Document Feedback 10 AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout (Continued) FIGURE 17. PCB - INNER LAYER 1 (TOP VIEW) Submit Document Feedback 11 AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout (Continued) FIGURE 18. PCB - INNER LAYER 2 (TOP VIEW) Submit Document Feedback 12 AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout (Continued) FIGURE 19. PCB - INNER LAYER 3 (TOP VIEW) Submit Document Feedback 13 AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout (Continued) FIGURE 20. PCB - INNER LAYER 4 (TOP VIEW) Submit Document Feedback 14 AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout (Continued) FIGURE 21. PCB - BOTTOM LAYER (TOP VIEW) Submit Document Feedback 15 AN1877.2 December 19, 2014 Application Note 1877 ZL8800-2CH-DEMO1Z Board Layout (Continued) FIGURE 22. PCB - BOTTOM ASSEMBLY (TOP VIEW) Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com Submit Document Feedback 16 AN1877.2 December 19, 2014