Quarter-brick power module

3 February 2010 Power Electronics / Power Management

The new QW24T25033 from Power-One is a quarter-brick DC-DC converter for use in communications, particularly wireless base station applications that utilise both 24 V and 48 V battery backup power.

This converter provides a 3,3 V output capable of delivering 25 A and performs equally well at nominal inputs of either 48VIN or 24VIN, where neither efficiency nor thermal performance are compromised.

The device, with efficiencies as high as 92%, offers a DOSA standard quarter-brick footprint (36,8 x 58,4 mm) and is RoHS compliant for all six substances. Additional features include a -40°C to +85°C operating temperature range, capability to withstand an 80 V input transient for 100 ms, ability to start up into pre-biased loads, and an onboard input differential LC filter.

The QW24T25033 offers remote sense, remote ON/OFF, negative or positive turn-on logic, and +10%/-20% output voltage trim ranges with industry-standard trim equations for design flexibility. Protections include output over-voltage and over-current, input under-voltage lockout, and over-temperature shutdown. Safety approvals include UL60950-1, CSA60950-1, EN60950-1 and IEC60950-1.

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