3kW AC-DC supply uses digital control for power sharing

3kW AC-DC supply uses digital control for power sharing

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By Nick Flaherty

Japanese power giant Cosel has launched a digitally-controlled 3kW AC-DC power supply for industrial and semiconductors applications.

The FETA3000BA includes active current sharing to allow  up to 10 units to be used in parallel for extra power or redundancy. The AC-DC power supply includes an active filter and uses a phase-shift, full-bridge topology offering an efficiency level of up to 93 percent. Addressing industrial applications and semiconductors equipment, the FETA3000BA complies with the SEMI F47 standard which requires that semiconductor processing equipment tolerates voltage sags on their AC power line.

With an input voltage range of 170 to 264VAC, the FETA3000BA-48 delivers an output voltage of 48VDC, adjustable from 38.40 to 52.80VDC using the built-in potentiometer, or 15.00 to 52.80VDC when using the trimming function available at the rear connector. The nominal output current is 62A and efficiency is up to 93 percent at 230VAC input.

The AC-DC power supply uses Cosel’s processor technology to implement a sophisticated voltage and current balance control algorithm. This simplifies system integrators’ task when connecting units in parallel or series. The digital control also controls switching parameters to optimize efficiency, reducing energy consumption.

To reduce audible noise, the FETA3000BA series is equipped with a thermo-regulated fan whose speed is automatically adjusted to optimize cooling for specific environments.

Aimed at industrial environments, the FETA3000BA series can be operated within a temperature range of -10 to +70C, 20 – 90%RH (Non condensing), and up to 3,000m (10,000 feet) max altitude. Depending on cooling and assembling method, a power derating may apply.

The FETA3000BA includes an input filter and complies with FCC Part 15-A, CISPR32-A, EN55032-A, VCCI-A. In cases where a higher conducted noise attenuation is required, COSEL recommends the NAC-20-472 filter. The 1U AC-DC power supply measures 102 x 41 x 340mm (4.02 x 1.61 x 13.39 in) and weighs 2.3k. It is also UL62368-1, C-UL (CSA62368-1), EN62368-1 safety approved.

The FETA3000BA AC-DC power supply is suitable for a wide range of applications including measurement and analysis equipment, machine tools, and semiconductor manufacturing equipment.

For higher power requirements, the FETA7000T has a three-phase / three wires 170-264VAC input, and the FETA7000ST with three-phase / four wires 300-480VAC input. Both models are available in two outputs versions, 48V and 144V, delivering up to 7488W.

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