MCRY-EVALKIT

Mercury Boost Converter Evaluation Kit MCRY-EVALKIT Matrix Mercury evaluation kit provides a simple platform for engineers to measure the performance of the DESCRIPTION Mercury energy harvesting PMIC, a family of highly integrated DC/DC boost converters that are ideal for harvesting and managing surplus energy from extremely low input voltage sources such as TEGs (thermoelectric generators) and thermopiles. The board allows the addition of an energy storage media to accommodate for various applications, and it has been optimized for low start-up voltage with a 50:1 turns ratio transformer that is on the board. Mercury features an 8-bit on-chip ADC that detects when the open circuit voltage VOC exceeds the programmed limit and turns off the input to ensure reliable operation. The outputs of the ADC are broken out on the board to allow real-time measurements. The evaluation kit is equipped with MCRY12-125Q-42DI, which is optimized for 12 input impedance, 12.5H inductor and 4.2V output. Please contact info matrixindustries.com for customization options. ORDERING Part Number Type INFORMATION MCRY-EVALKIT Evaluation Kit for MATRIX Mercury Energy Harvesting Boost Converter TYPICAL VOC Start-up happens at Voc=24mV and the maximum Voc for operation is 500mV. SPECIFICATIONS V 4.2V with the default setup. OUT (25C) KIT FILES MCRY-EVALKIT BOM MCRY-EVALKIT PCB Layout Diagrams MCRY-EVALKIT Schematic An isolated voltage source with millivolt-scale precision should be used, and source-measure units (SMUs) are REQUIREMENTS recommended. To measure voltages, isolated meters with input impedances >1G are ideal, and SMUs are useful here as well. Handheld voltage meters are isolated but generated have lower input impedances between 1M or 10M, which can add additional loading when connected to Mercurys VOUT pin. Use high impedance meters or avoid connecting them to VOUT pin. Line-powered voltage sources and SMUs must have isolated outputs. Non-isolated instruments can inadvertently connect Mercurys VINM and GND pins, which will prevent Mercury from operating. When used, ADC REF and ADC CLK pins should be connected to impedance of 10M or greater to minimize loading of Mercurys data outputs. Short them to GND if unused. If using a TEG source, select one with output impedance R = R * (1 + ZT) at the operating TEG TEG,AC temperature. See INPUT IMPEDANCE AND LOAD MATCHING in the Mercury datasheet for more details. 1 MATRIX Industries 1455 Adams Drive 1190 Menlo Park, CA 94025 +1 650-462-1003 www.matrixindustries.com info matrixindustries.comThis section describes how to get started using Mercury with a voltage source. QUICK START Voltage output GUIDE 1. Open jumper JP1, and close jumpers JP2 and JP3. This simulates the output impedance of a TEG, and disables the ADC outputs. 2. Connect voltage source positive lead to JP4 and negative lead to JP5. This is the source voltage VOC. 3. Connect voltage sense leads to JP6 and JP7. This is the output voltage VOUT provided by Mercury. 4. Source a small voltage V < 500mV with the voltage source and note the rising output voltage V . OC OUT Figure 1: Connection block diagram of MCRY-EVALKIT during quick start Figure 2: MCRY-EVALKIT 2 MATRIX Industries 1455 Adams Drive 1190 Menlo Park, CA 94025 +1 650-462-1003 www.matrixindustries.com info matrixindustries.com