USERS MANUAL ZL6100EVAL1Z AN1493 Rev 0.00 Evaluation Board September 4, 2009 The ZL6100 is an integrated mixed-signal power Target Specifications conversion and management IC that combines an V = 12V IN efficient step-down DC/DC converter with key power V = 1.2V/15A (20A max) and thermal management functions in a single OUT package. The ZL6100 incorporates current sharing and f = 400kHz sw adaptive efficiency-optimization algorithms to provide Efficiency: 86% at 10A a flexible, efficient power IC building block. Output Ripple: 1% The ZL6100EVAL1Z platform is a 4-layer board Dynamic Response: 3% demonstrating a 15A synchronous buck converter. (50% to 100% to 50% load step, di/dt = 2.5A/s) Sequencing, tracking, margining, plus other features Board Temperature: +25C can be evaluated using this board. A USB to SMBus adapter board can be used to connect Functional Description the evaluation board to a PC. The PMBus command set The ZL6100EVAL1Z provides all circuitry required to is accessed by using the Zilker Labs PowerNavigator demonstrate the features of the ZL6100. The evaluation software from a PC running Microsoft ZL6100EVAL1Z has a functionally-optimized ZL6100 Windows. circuit layout that allows efficient operation up to the maximum output current. Power and load connections Key Features are provided through plug-in sockets. 15A Synchronous Buck Converter A majority of the features of the ZL6100 such as Optimized for Small Circuit Footprint and Dynamic soft-start delay and ramp times, supply sequencing, Response voltage tracking, and voltage margining are available Configurable through SMBus on this evaluation board. For voltage tracking and sequencing evaluation, the board can be connected to Onboard Enable Switch any other Zilker Labs evaluation board that supports Power-Good Indicator the Digital DC (DDC) bus. Ordering Information Figure 1 shows a functional block diagram of the ZL6100EVAL1Z board. The SMBus address is selectable PART through a jumper on the top side of the board. All NUMBER DESCRIPTION 2 power to the board (VIN and I C bus) must be ZL6100EVAL1Z ZL6100 Evaluation Kit (EVB, USB Adapter, removed before changing the jumpers. Cable, Software) V IN EN SYNC ZL6100 V OUT SMBus DDC VTRK ENABLE SW1 J10 J11 SYNC SYNC DDC DDC SMBus SMBus TRA CK TRA CK PG PG FIGURE 1. ZL6100EVAL1Z BLOCK DIAGRAM AN1493 Rev 0.00 Page 1 of 15 September 4, 2009ZL6100EVAL1Z The hardware enable function is controlled by a toggle 4. Connect supplied USB cable from computer to USB switch on the ZL6100EVAL1Z board. The power-good to SMBus adapter board (Optional: provides power (PG) LEDs indicate the correct state of PG when external for onboard LEDs so that LED power does not power is applied to the ZL6100EVAL1Z board. The right detract from efficiency measurement) angle headers at opposite ends of the board are for 5. Connect power supply to V /V (supply turned IN+ IN- connecting a USB to SMBus adapter board or for daisy off) chaining of multiple evaluation boards. 6. Turn power supply on Figure 2 shows the operational circuit. The circuit 7. Set ENABLE switch to ENABLE consists of the ZL6100 IC with its minimal component 8. Monitor ZL6100EVAL1Z board operation using an count to realize a 15A buck converter. The board layout oscilloscope has been optimized for thermal performance. Figure 3 is the board interface circuitry and Figures 4 through 8 USB (PMBus) Operation demonstrate the PCB Board Layout, which includes the 1. Set ENABLE switch to DISABLE board fabrication notes. 2. Apply load to V /V OUT+ OUT- The Bill of Materials (BOM) and configuration file are also 3. Connect power supply to V /V (supply turned IN+ IN- included for reference beginning on page 10. off) 4. Turn power supply on Operation 5. Insert the Zilker Labs Eval Kit CD PMBus Operation 6. Connect USB to SMBus adapter board to J10 of The ZL6100 utilizes the PMBus protocol. The PMBus ZL6100EVAL1Z functionality can be controlled via USB from a PC running 7. Connect supplied USB cable from computer to USB the PowerNavigator evaluation software in a Windows XP to SMBus adapter board. or Windows 2000/NT operating system. - Upon first-time connection, the Found New Install the evaluation software using the CD included in Hardware Wizard will appear. the ZL6100EVAL1Z kit. - Windows XP users: Select No at prompt to search For board operation, connect the included USB-to-SMBus the Internet for drivers. adapter board to J10 of the ZL6100EVAL1Z board. - Follow the steps on the screen to install the drivers Connect the desired load and an appropriate power from the CD. supply to the input and connect the included USB cable 8. Install the PowerNavigator evaluation software by to the PC running the PowerNavigator evaluation running setup.exe from the software. Place the ENABLE switch in DISABLE and turn PowerNavigator installer folder on the CD. on the power. 9. Set ENABLE switch on EVB to ENABLE The evaluation software allows modification of all ZL6100 PMBus parameters. The ZL6100 device on the board has 10.Monitor and configure the ZL6100EVAL1Z board been pre-configured as described in this document, but using PMBus commands in the evaluation software the user may modify the operating parameters through 11.Test the ZL6100EVAL1Z operation using an the evaluation software or by loading a predefined oscilloscope and the evaluation software. scenario from a configuration file. Use the mouse-over pop-ups for PowerNavigator help. Refer to Zilker Labs application note AN2033 for PMBus details. The ENABLE switch can then be moved to ENABLE and the ZL6100EVAL1Z board can be tested. Alternately, the PMBus ON-OFF CONFIG and OPERATION commands may be used. Quick Start Guide Stand Alone Operation 1. Set ENABLE switch to DISABLE 2. Apply load to V /V OUT+ OUT- 3. Connect the USB to SMBus adapter board to J10 of ZL6100EVAL1Z (Optional: provides power for onboard LEDs so that LED power does not detract from efficiency measurement) AN1493 Rev 0.00 Page 2 of 15 September 4, 2009