Enpirion Power Evaluation Board User Guide EP53x7xQI PowerSoC Enpirion EP53x7xQI DC/DC Converter Module Evaluation Board Introduction Thank you for choosing Altera Enpirion power products This application note describes how to test the following EP53x7xQI converters using the Altera Enpirion 3x3 Module EVAL BOARD shown in Fig. 1: EP5367LQI, EP5367HQI, EP5387LQI, EP5387HQI, EP53A7LQI, and EP53A7HQI. In addition to this document you will also need the device datasheet. The EP53x7xQI converters are part of a new class of DC/DC converter products, a complete power system on silicon: These devices are complete modules including magnetics, and require only ceramic input and output capacitors. The evaluation board is designed to offer a wide range of engineering evaluation capabilities. This includes the base configuration of an 0603 input capacitor and an 0805 output capacitor. Pads are available to add up to one additional input capacitor and up to two additional output capacitors to allow for evaluation of performance over a wide range of input/output capacitor combinations. Pads are available to populate an external divider if desired. Easy jumpers are provided for the following signals: o Adaptive-biased light load mode (LLM) o Enable o VS0-VS3 output voltage select Numerous test points are provided as well as clip leads for input and output connections The board comes with input decoupling, and input reverse polarity protection to safeguard the device from common setup mishaps. Quick Start Guide STEP 1: Set the ENABLE jumper to the Disable Position. CAUTION: the signal pins LLM, ENA, VS0, VS1, VS2, and VS3 must be connected to a logic high, jumper to the left, or a logic low, jumper to the right. If left floating the state is indeterminate. Page 1 of 9 www.altera.com/enpirion Enpirion Power Evaluation Board User Guide EP53x7xQI PowerSoC STEP 2: Connect a power supply to the input test points, TP8 (+) and TP5 (-) as indicated in Figure 1. The same test points can also be used to measure the input voltage. CAUTION: be mindful of the polarity and the voltage magnitude. If V is IN greater than 6V, the board may get damaged. If the input voltage polarity is wrong, diode D1 will conduct, and draw excessive input current. STEP 3: Set the output voltage select pins for the desired output voltage. Refer to Tables 1 and 2 to determine the setting. CAUTION: the external resistor divider is not populated in the standard board configuration. Choosing the EXT option for the EP53x7LQI without the external resistors R1 and R2 will result in unpredictable behavior. STEP 4: Connect the load to the output connectors TP7 (+) and TP6 (-), as indicated in Figure 1.The same test points are also used to measure the DC output voltage. LLLLMM LLM LLM STEP 5: Connect the LLM jumper as needed. A voltage greater than 1.4V will enable LLM, and less than 0.4V will disable it. LLM Enabled LLM Disabled Page 2 of 9 www.altera.com/enpirion