The MAX5042 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a high-efficiency, high-power, isolated, hot-pluggable, 40W (with adequate cooling) forward DC-DC converter in the industrystandard half-brick footprint. The circuit is configured for a +5.0V output voltage and provides up to 8A of current. Power for the circuit can be provided from either a +36V to +75V or -36V to -75V DC source used in the telecom/datacom markets (48V modules), industrial environments, or in automotive 42V power systems. A high efficiency of up to 85% at 6A and 30W output power is achieved using a clamped two-transistor topology. Part of the efficiency improvement is due to the recovery of stored leakage and magnetizing inductance energy at the primary side. Galvanic isolation is achieved by an optocoupler and the surface-mount planar transformer. Operation at 250kHz allows the use of small magnetics and output capacitors. The EV kit provides cycle-bycycle current-limit protection. Additional steady-state fault protection is provided by integrating fault protection and internal thermal shutdown. The MAX5042 also has a programmable undervoltage lockout (UVLO). Warning: The MAX5042 EV kit is designed to operate with high voltages. Dangerous voltages are present on this EV kit and on equipment connected to it. Users who power up this EV kit or power the sources connected to it must be careful to follow safety procedures appropriate to working with high-voltage electrical equipment.