Converters achieve 89% efficiency

Unipower's TPCMQ24 series dc-dc bus converters are able to convert 24Vdc to either 48 or 54.4Vdc for numerous applications, including industrial and telecommunications. Output current is 20.8A at 48V or 18.4A at 54.4V, delivering 1000W of total power. These converters operate from a wide range 20 to 30VDC (24V nominal) input with an efficiency of 89% and power density of 12.5W/in³.

The hot-swap converters measure 1U high and come rackmounted in a 19-in. shelf that can accept up to three converters (providing 3000W of total power). The output from the shelf is 62.4A at 48V or 55.2A at 54.4V. For added power, multiple shelves can be paralleled; the system can also be used in N+1 redundant mode.

The converters also include automatic load sharing; output ORing diodes; adjustable output voltages; a 5V, 250mA standby output, and integral LED status indicators. Control and monitoring features include output power good, input power fail, thermal warning, and inhibit functions.