NBM6123E46C15A6T0R Vicor

USER GUIDE UG:019 NBM6123 ChiP Analog Low-Voltage Non-Isolated Bus Converter Module Evaluation Board Contents Page Introduction 1 Contents 3 Features 3 Board Description 3 General Components 3 Test Points Description 5 Bill of Materials 8 Recommended Test Equipment 9 Basic Connections 9 Board Operation Details 9 Thermal Considerations 10 Paralleling 10 Introduction The Converter housed in a Package (ChiP) Non-Isolated Bus Converter Module (NBM) evaluation board described in this document is designed to be used with the the through-hole NBM6123 ChiP family (PNs: NBM6123T46C15A6T0R, NBM6123T60E12A7T0R). The NBM evaluation board can be configured for various enabling and fault-monitoring schemes, as well as to exercise various loading conditions depending on the application requirements. The evaluation board can be used to evaluate NBMs in either a stand-alone configuration or as an array of modules. It is important to remember the fast response of NBMs can readily show the limitations of the source, load and associated wiring connected to the evaluation board. Care should be exercised to minimize the stray source and load impedance in order to fully exercise the NBM. The NBM non-isolated topology allows start up in forward and reverse directions and provides bidirectional protections. However, if powertrain is disabled by any protection, and V is present, then SEC voltage equal to V minus two diode drops will appear on the primary side. SEC UG:019 Page 1 IMPORTANT NOTICE: Read the precautions below entirely BEFORE using the NBM evaluation board. Do not operate the evaluation board unless you have the appropriate safety precautions in place on your bench to guarantee safety. The list below is not comprehensive and is not a substitute for common sense and good practice. nnDuring operation, the power devices and surrounding structures can be operated safely at high temperatures. nnRemove power and use caution when connecting and disconnecting test probes and interface lines to avoid inadvertent short circuits and contact with hot surfaces. nnNever use a jumper in place of the fuse. nnWhen testing electronic products always use approved safety glasses. Follow good laboratory practice and procedures. nnAvoid creating ground loops between the SGND and PGND pins when making measurements. nnCare should be taken to protect the user from accidental contact when under power. nnCare should be taken to avoid reversing polarities if connecting to the opposite (solder) side of the board. nnThe product evaluation boards described in this document are designed for general laboratory evaluation and are not suitable for installation in end-user equipment. nnRefer to the specific NBM module data sheet for electrical, thermal and mechanical product details. This board provides a convenient way to evaluate or demonstrate the performance of Vicor NBM products. Kelvin connections are provided for accurate voltage measurements on power nodes. Sockets are provided to permit quick installation and changing of bulk filtering capacitors. The evaluation board also provides lugs for input / output connections, test points and sockets for easy connection to standard test equipment, and a high-performance air-cooled heat-sink assembly. Enable Options 1. Apply input voltage to the NBM primary or secondary pins greater than the undervoltage lockout. (Default) 2. On-board mechanical switch. 3. External control using available test point. Fault Monitor Options 1. On-board LED: the VAUX pin drives a visible LED for visual feedback on the NBM status such as enabled or fault condition. UG:019 Page 2