Power Electronics / Power Management


Hot swap power supplies

27 October 2010 Power Electronics / Power Management

TDK-Lambda’s new HFE1600 series is a 1U high, single output AC-DC hot swap front end power supply with a power density of 1,54 W cm³. The 1,6 kW units are intended for equipment requiring reliable 12 V, 24 V and 48 V bulk power, such as communications, broadcast, military (COTS), laser and process control. Up to 20% output voltage adjustment is possible, enabling the power supply to be customer set according to specific needs. Operating from a universal 85 to 265 V a.c. input, the high efficiency of up to 92% minimises heat dissipation and power consumption, thus meeting Climate Savers Computing efficiency standards.

With dimensions of 300 x 85 x 41 mm, the HFE1600 power supplies can be used individually or up to five units can be mounted into a dedicated 1U rack available from TDK-Lambda delivering 8 kW. A total of 10 units can be configured in parallel to form a hot swap N+1 redundant power system with single-wire current sharing. Alternatively, different voltage models can be mixed and matched to customer requirements. A keying system prevents misinsertion of different voltage units. Each power supply has variable-speed cooling fans and can operate in temperatures ranging from -10°C to +70°C.

Output voltage is programmable by resistance, external voltage or optional PM Bus compatible I²C communication interface. Output current is external voltage or PM bus programmable. Over-voltage, over-current and over-temperature are standard protection features and front panel mounted DC OK and LEDs are provided for visual monitoring. For system monitoring there are opto-isolated signals for DC OK, AC-fail, over-temperature and ‘power supply present’. Remote ON/OFF control and remote sense are included. Monitoring is also available via the optional I²C interface and includes a fan fail alarm.

The HFE1600 hot swap front end power supplies comply with EN55022 and FCC Class A radiated and Class B conducted emissions and meet IEC61000-4 immunity. The units are safety approved to EN/IEC/UL 60950-1 edition 2 with CE mark. All HFE1600 power supplies from TDK-Lambda are backed by a three-year warranty.



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