MAX5058EVKIT

Product Details

The MAX5058 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a high-efficiency, 50W, isolated, synchronously rectified forward converter in the industry-standard 1/8th brick pinout. The circuit is configured for a +3.3V output voltage and provides up to 15A of output current. The circuit can be powered from either a +36V to +72V or -36V to -72V DC source in applications such as telecom/datacom (48V modules), industrial environments, or in automotive 42V power systems.

Using a clamped two-transistor power topology on the primary side and synchronous rectifiers on the secondary side achieves high efficiency up to 91% and is achieved at 9A. The efficiency improvement on the secondary side is achieved through synchronous rectification using the MAX5058 secondary-side synchronous rectifier driver and feedback generator controller IC, which drives two n-channel MOSFETs. Additionally, the recovery of stored leakage and magnetizing inductance energy at the primary side contributes to the overall efficiency improvement. The primary side uses a MAX5051 parallelable, clamped, two-switch power-supply controller IC. Galvanic isolation up to 500V is achieved with an optocoupler, pulse-signal transformer, and planar surface-mount power 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 an integrating fault protection that reduces average dissipated power during continuous short-circuit conditions. The MAX5051 also has a programmable undervoltage lockout (UVLO). Multiple MAX5058 EV kits can be paralleled for increased power capability when high output current is required. Margin-up/down capability enables an increase or decrease in the output voltage. The EV kit demonstrates the MAX5058 look-ahead signal capability, on-board error amplifier, and reference voltage source. Remote-load voltage sensing allows accurate voltage regulation at the load.

Warning: The MAX5058 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.

Under severe fault or failure conditions, this EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this kit with care to avoid possible personal injury.

The user must supply an additional 100µF bulk storage capacitor between the EV kit's +VIN and -VIN input terminals before powering up or the MAX5058 EV kit may be damaged.

Applications

• ±8V Power-Supply Modules
• ±8V/±2V Server Power Supplies
• Industrial Power Supplies
• Isolated Networking Power Supplies
• Isolated Telecom Power Supplies