Emerson Network Power Launches 1200 AND 2000W Bulk Front-End Power Supplies
Emerson Network Power has launched two new bulk front-end power supplies for systems that use distributed power architectures. Rated at 1200 and 2000W respectively, the new DS1200-3 and DS2000-3 power supplies generate a main payload output of 12Vdc and an auxiliary output of 3.3Vdc for powering standby circuitry. An alternative auxiliary output of 5Vdc is optionally available. Both power supplies are digitally programmable – they are equipped with an I²C interface and use the industry-standard PMBus™ communications protocol.
Forming the latest additions to the company’s DS series product line, the DS1200-3 and DS2000-3 are intended primarily for use in rack-mounting server type applications, such as data centers. The power supplies use what is described as an advanced power conversion topology to maximize efficiency and are said to have exceptionally compact form factors; both models have a height of just 1.6 inches, which makes them suitable for use in 1U high rack-mounting equipment.
DS1200-3 and DS2000-3 power supplies feature a very wide 90 to 264Vac input voltage range and employ active power factor correction to minimize input harmonic current distortion and to ensure compliance with the international EN61000-3-2 standard – they have a power factor of 0.99 typical. The power supplies also feature active ac inrush control, to automatically limit inrush current at turn-on to 55A maximum.
The DS1200-3 can deliver up to 98.4 A from its main +12 Vdc payload output, and up to 6 A from its +3.3 Vdc auxiliary output. The supply has a 1 x 2U form factor – it measures 10.9 x 3.3", with a height of 1.6" – and has a power density of more than 21 watts per cubic inch. When fed with a 180 to 264 Vac input, the DS1200-3 can achieve a very high – 91% typical – conversion efficiency at 50% full load.
The DS2000-3 power supply is capable of delivering up to 164.2 A from its main +12 Vdc payload output, and up to 9 A from its auxiliary +3.3 Vdc output. The DS2000-3 has a 1 x 3U form factor – it measures 11.6 x 4.2 x 1.6" –– and has a high power density of 26 watts per cubic inch. When fed with a 180 to 264 Vac input, the power supply can achieve in excess of 92% efficiency between 50 and 75% full load.
DS1200-3 and DS2000-3 power supplies offer active single-wire current sharing which operates from 10 to 100% of full load, enabling multiple supplies to be easily paralleled for very high current applications. Both supplies are hot pluggable, have no minimum load requirement, and incorporate low-loss internal ORing FETs (Field Effect Transistors) on their main 12 V output, for fault-tolerant and N+1 redundancy applications.
Both power supplies contain a serial EEPROM (electrically erasable programmable read-only memory) that is preprogrammed 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 communications protocol, enables the data to be read back to the system under power; the interface also allows the system to interrogate the power supply to ascertain various operational parameters, including input and output status, fan blocked or running under-speed, and overcurrent and overvoltage flags.
DS1200-3 and DS2000-3 power supplies incorporate fan cooling with automatic speed control and have an ambient operating temperature range of -10 to +50°C, with 50% derating at +70°C. The power supplies meet the rigorous EN55022-B and FCC part 15 Class B conducted and radiated emissions standards, and comply with applicable EMC immunity standards, including EN61000-3-2 and -3, and EN61000-4-2, -3, -4, -5 and -11. The supplies carry EN60950 and UL/cUL 60950 safety approvals.
Standard lead-time is stock to 8 weeks. Pricing starts at US $510 for the DS1200-3 and US $791 for the DS2000-3, in quantities of 100.
