Simplified Block Diagram
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- Isolated, Hot-Pluggable 40W Forward DC-DC Converter
- ±36V to ±75V Input Range
- +5V Output Up to 8A (With Adequate Cooling)
- VOUT Regulation Better than 0.1% Over Line and Load
- 85% Efficiency at 48V and 6A
- Half-Brick Module Footprint and Pinout
- Cycle-by-Cycle Current-Limit Protection
- Programmable Integrating Fault Protection
- Internal Thermal Shutdown
- 250kHz Switching Frequency
- Designed for 500V Isolation
- Latched Shutdown
- Remote Output-Voltage Sense
- Fully Assembled and Tested
- 42V Automotive Power Supplies
- Distributed Power Systems with 48V Bus
- High-Efficiency Telecom/Datacom Power Supplies
- Power-Supply Modules
- Router/Switch Cards with 48V Backplane Power Systems
- Servers with 48V Backplane Power Systems
- xDSL Line Cards
- xDSL Line-Driver Power Supplies
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-by-cycle 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.
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 EV kit with care to avoid possible personal injury.
Do not short the -VIN pad to the "EV kit Ground" when the hot-swap MOSFET N1 is off (please consult the "Absolute Maximum Voltage Rating Diagram" in the MAX5042 data sheet). The -VIN pad and EV kit ground are at an 80V difference. The EV kit user should not probe the circuit with an oscilloscope probe and ground clip unless they have high-voltage hot-swap experience.