TDK-Lambda News

Ideal for a host of base station and telecommunication applications, computing and distributed power architectures, the PAH350S48, Lambda’s latest high density half-brick DC-DC converter, delivers 350W of output power from a single 12 or 28V DC output.

With 12V emerging as an industry-standard intermediate bus voltage, the PAH350S48-12 is perfect for use in conjunction with point-of-load, non-isolated converters, providing both load and line regulation of no more than 24mV. Such high power density in a half-brick package makes the PAH350S48-28 ideally suited to base station amplifier applications.

The PAH350S48 has a nominal input voltage of 48V and boasts a power efficiency of 89%. The 12V device delivers a maximum output current of 29.2A while the 28V module provides 12.5A. Output voltage adjustment is –40 to +10% on the 12V model and –40 to +18% on the 28V power module.

Impressively, the new DC-DC converter delivers 50W more power from the same industry standard package as Lambda’s earlier 300W half-brick design. The PAH350S48 weighs-in at only 100g and combines a footprint of 58 x 61mm with a low profile of just under 13mm, bringing significant benefits to designers looking to maximise power density on their board.

The new PAH350S48 employs conduction cooling via the base plate to give an operating temperature range of -40 to +100°C. This means that the new DC-DC converter is also suitable for use in applications operating under harsh conditions of low airflow and high ambient temperatures.

Other features include remote on/off control, over voltage, over current and over temperature protection. Isolation withstand voltage is: input-to-output 1.5kV DC for 1 min; input-to-base plate 1.5kV DC; and output-to-base plate 500V DC for 1 min.

PAH converters are CE marked in accordance with the low voltage directive and carry a range of international approvals including UL1950, EN60950 and CSA950.