EP4660-9R

These extremely compact DC-DC converters incorporate all necessary input and output filtering, signalling and protection features which according to the latest industry standards are required in the majority of applications. The converters provide important advantages such as flexible output power through primary current limitation, extremely high efficiency, excellent reliability, very low ripple and RFI noise levels, full input to output isolation, negligible inrush current, soft start, overtemperature protection and input over-/undervoltage lock-out. The converter inputs are protected against surges and transients occurring on the source lines, covering a total input voltage range from 16 V DC up to 150 V DC with five different types. The outputs are continuously open and short circuit proof. LEDs at the front panel and an isolated output power good option indicate the status of the power supply modules. Voltage suppressor diodes protect the outputs against an internally generated overvoltage. Full system flexibility and n+1 redundant operating mode are possible due to virtually unrestricted series or parallel connection capabilities of all outputs. In parallel connection of several units, current sharing option is provided by a single wire interconnection. As a modular power supply or as part of a distributed power supply system, the low profile design significantly reduces the necessary power supply volume without sacrificing high reliability. The units are designed as forward converters using planar magnetics and control circuits in hybrid technology. The switching frequency is fix at 307 kHz under normal operating conditions. Triple and quadruple output modules have their voltage regulation of output 3 and 4 relying on the close magnetic coupling of transformer and output conductor together with the circuit symmetry of their main outputs 2, respectively 1. Outputs with an equal output voltage can either be series or parallel connected.

• Extremely high efficiency
• Flex power: Flexible load distribution
• Excellent surge and transient protection
• 4242 V DC input to output electric strength test
• Redundant operation (n+1), current sharing option
• Extremely low inrush current, hot plug-in
• Externally adjustable output voltage
• Inhibit primary or secondary referenced
• Very compact and fully functional unit (20 mm wide)
• Telecoms compatible input voltage range of DP units according to prETS 300132-2 (40...101 V DC)