All four modules offer active single-wire current sharing which operates from 10 to 100% of full load, enabling multiple modules to be easily paralleled for very high current applications. The modules are all hot pluggable, and incorporate low-loss internal ORing FETs (Field Effect Transistors) on their main 12 V output, for fault-tolerant and N+1 redundancy applications. They have no minimum load requirement, and maintain main output regulation to within ±5%. Each power module contains a serial EEPROM (electrically erasable programmable read-only memory) that is pre-programmed with data about the unit - including its type, serial number and date of manufacture - to facilitate replacement in the field. A built-in I2C interface, which uses the PMBus protocol, enables the data to be read back to the system under power; the interface also allows the system to interrogate the power module to ascertain various operational parameters, including input and output status, fan blocked or running under-speed, and overcurrent and overtemperature flags. The dc-input DS series power modules are compact, high efficiency units with a 1U x 2U form factor. They incorporate fan cooling and have an ambient operating temperature range of +10 to +45 degrees Celsius, with 50% derating at +70 degrees Celcius.
The modules comply with all applicable EMC immunity standards, including EN61000-4-2, -3, -4, -5, -6 and -11. The power supplies carry UL/cUL60950-1 and EN60950-1 VDE safety approvals. Sample quantities of all four dc-input DS series power modules are available for immediate delivery. Standard lead-time is stock to 8 weeks. Pricing starts at US $418 for the DS450DC and US $498 for the DS850DC, in quantities of 250.
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