USERS MANUAL ZL2102DEMO1Z AN1874 Rev 0.00 Demonstration Board August 6, 2013 Description Key Board Features The ZL2102DEMO1Z is an innovative power conversion and Small, compact design management IC that combines an integrated synchronous SMBus control interface step-down DC/DC converter with key power and fault V range of 7.5V to 14V IN management functions in small package, resulting in a flexible and integrated solution. The ZL2102DEMO1Z platform allows V adjustable from 0.6 V to 3.6 V OUT quick evaluation of the highly configurable ZL2102DEMO1Zs Convenient power connection performance and features in either stand-alone mode or via Onboard enable switch the SMBus interface using Intersils PowerNavigator GUI software. Power-good indicator Interconnectivity with other intersil demo boards Specifications This board has been configured and optimized for the following References operating conditions: FN8440 ZL2102 Data Sheet. V = 12V IN V = 3.3V OUT Ordering Information I = 6A MAX PART NUMBER DESCRIPTION f = 600kHz SW ZL2102DEMO1Z ZL2102 Evaluation Kit, one channel Peak efficiency: >85% at 50% load (EVB, USB Adapter, Cable, Software) Output ripple: <0.5% at 6A Dynamic response: 3.5% (3A to 5A and 5A to 3A steps, di/dt = 2.5A/s) Board temperature: +25C V IN EN SYNC ZL2102 V OUT DDC SMBus ENABLE SW1 ENABLE ENABLE SYNC SYNC DDC DDC SMBus SMBus FIGURE 1. ZL2102DEMO1Z BLOCK DIAGRAM AN1874 Rev 0.00 Page 1 of 12 August 6, 2013ZL2102DEMO1Z Functional Description PCB Layout Notes The ZL2102DEMO1Z Demo Board provides a simple platform to The ZL2102DEMO1Z PCB layout has been optimized for demonstrate the features of the ZL2102. The ZL2102DEMO1Z electrical and thermal performance. has a functionally optimized ZL2102 circuit layout that allows The following key features are: efficient operation up to the maximum output current. Power and The large 5x5 via pattern under the ZL2102 is connected to a load connections are provided through plug-in sockets. large copper plane for effective thermal dissipation. Standalone operation is achieved using a combination of pin-strap settings and stored settings. The pin-strap setting SGND and power GND are isolated. The ZL2102s thermal pad is connected to the isolated SGND plane which is then details are described in the ZL2102 data sheet. The stored reconnected to the power GND plane at pin 14 of ZL2102 on settings are listed in Default Configuration Settings on page 11. inner layer 1. The ZL2102DEMO1Z Demonstration Board is shown in Figure 2 and Figure 3. The hardware enable function is controlled by a The VSEN pin is Kelvin connected to C2 through inner layer 2 is for improved noise performance. toggle switch. The power-good (PG) LED indicates that V OUT regulating. The right angle headers at opposite ends of the board are for connecting a USB to SMBus control board or for daisy Quick Start Guide chaining of multiple Intersil evaluation boards. Stand Alone Operation Connecting multiple Intersil Zilker Lab boards allows the user to setup many shared features such as clock synchronization, 1. Ensure that the board is properly connected to the supply and controlled sequencing, phase spreading, and fault spreading loads prior to applying any power. within Intersils Power Navigator software as part of a single 2. Connect the input supply to VIN and GND. power project. The ZL2102DEMO1Z Circuit Schematic (Figure 9) 3. Connect the load to VOUT and GND. shows the schematic, bill of materials, and PCB layers for reference. Figures 10 through 13 show performance data taken 4. Set ENABLE switch to DISABLE. using this hardware in its optimized configuration. The 5. Turn input power supply ON. configuration settings that the hardware ships with are shown on 6. Set ENABLE switch to ENABLE. Page 11. 7. Test ZL2102 operation. Operating Range USB (PMBus) Operation By default, the ZL2102DEMO1Z is configured for the operating 1. Follow step 1 through 5 of Stand Alone Operation. conditions shown in USB (PMBus) Operation. The board can 2. Download PowerNavigator software from the Intersil website also support a wider operating range, and modifying the and install. operating conditions will change the performance results. 3. Connect USB-to-SMBus interface board to J2 of The board V range is 7.5V to 14V. The board V setting is IN OUT ZL2102DEMO1Z. fixed at 3.3V by pin strap setting, but the programmable range is 4. Set voltage to desired value in GUI. 0.54V to 3.6V (including margin high/low). The output voltage can be changed by using the VOUT COMMAND PMBus 5. Set ENABLE switch on EVB to ENABLE. command. The board I range is 0 to 6A. For continuous OUT 6. Monitor and configure EVB using PMBus commands in the operation at 6A, airflow across the board may be needed. evaluation software. The switching frequency (f ) is set to 600kHz by PMBus SW 7. Test ZL2102 operation using the evaluation software. command, but the f setting can be changed by using the SW FREQUENCY SWITCH PMBus command (while the device is disabled). The f range is 200kHz to 1MHz. SW AN1874 Rev 0.00 Page 2 of 12 August 6, 2013