Emerson Network Power has launched two high-efficiency bulk front-end power supplies for systems that use distributed power architectures. Rated at 1200W and 2000W, respectively, the 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 available. Both power supplies are digitally programmable as they are equipped with an I2C interface and use the industry-standard PMBus communications protocol. The power supplies are intended primarily for use in rack-mounting server type applications, such as data centres. The power supplies use an advanced power conversion topology to maximise efficiency and have compact form factors; both models have a height of 40 mm, which makes them ideal for use in 1U high rack-mounting equipment. The power supplies feature a very wide 90 to 264 Vac input voltage range and employ active power factor correction to minimise input harmonic current distortion and to ensure compliance with the international EN61000-3-2 standard, with a typical 0.99 power factor. The power supplies also feature active ac inrush control, to automatically limit inrush current at turn-on to 55A maximum. Both power supplies employ a new patent-pending ultra high efficiency conversion topology with an innovative power transformer and rectifier construction that further improves power density and reduces interconnect power losses. The power supplies' main +12Vdc payload output is digitally programmable over the range 11.4 to 12.6Vdc, and users have a choice of standard I2C or advanced PMBus communications. The control software runs under Windows on any standard PC, and uses a highly intuitive graphical user interface to simplify power supply set-up. The DS1200-3 can deliver up to 98.4A from its main +12Vdc payload output, and up to 6A from its +3.3 Vdc auxiliary output. The supply has a 1Ux2U form factor. It measures 28.4x8.1cm, with a height of 4cm, and has a power density of more than 1.3W per cubic centimetre.

 

Hall B3.566