Low-profile power supply series for applications requiring high-speed response

Cosel Co, Ltd has added a 3000W AC/DC enclosed power supply with an adjustable output voltage from 100VDC to 350VDC for industrial applications needing a fast output voltage response. Developed with the company's advanced built-in digital microprocessor technology, the FETA3000BC incorporates active current sharing, making it simple to parallel up to ten units for extra power or redundancy. For high efficiency, the device includes an active filter and uses a phase-shift, full-bridge topology, providing an efficiency level of up to 93%. Satisfying demanding industrial applications, its high-tech design delivers a high response speed to adjustments of the output voltage across the full range.

Like envelop tracking technology used in power amplifiers, industrial applications such as laser, plasma processing, and industrial heating require the output voltage of power supplies to adjust rapidly within the range of 100VDC to 350VDC in less than 2ms to deliver an accurate voltage to the emitting element. This needs very tight, specific power control, and thanks to the propriety fast response technology, the device's response time across the full output voltage range is just 1.5ms, ensuring high-performance levels to the final equipment.

With an input voltage range of 170VAC to 264VAC, the FETA3000BC-250 delivers a nominal output voltage of 250VDC, adjustable from 180VDC to 350VDC, utilising the built-in potentiometer, or 100VDC to 350VDC when employing the trimming analog control function available at the interface connector. The nominal output current is 12A, and efficiency is up to 93% at 230VAC input.

Utilising the company's digital microprocessor technology, the series incorporates a very sophisticated voltage and current balance control. This simplifies system integrators' task when connecting units in parallel or series. The technology permits connecting up to ten units in parallel without adding any other external components. The advanced digital control also cleverly controls switching parameters to optimise efficiency, lowering energy consumption.

To reduce audible noise, the series has a thermo-regulated fan whose speed is automatically modified to optimise cooling according to actual needs.

The series includes inrush current limiting circuitry, overcurrent and overvoltage and thermal protection. Power Good and Alarm signals are obtainable from the interface panel, and LED highlights those states. The unit can be remotely controlled via RC pin.

Aimed for use in industrial environments, the series can be operated within a temperature range of -10C to +70C, 20-90%RH (non-condensing), and up to 3,000m (10,000') max altitude. Depending on cooling and assembling methods, a power derating may apply.

The series includes an input filter and complies with FCC Part 15-A, CISPR32-A, EN55032-A, and VCCI-A. In cases where a higher level of conducted noise attenuation is needed, the company recommends using the NAC-20-472 filter. The power supply has an input-to-output isolation of 3,000VAC, input-to-ground (FG) of 2,000VAC and output-to-ground (FG) of 2,000VAC. It is UL62368-1, C-UL (CSA62368-1), EN62368-1 safety approved.

Designed for integrated industrial applications in 1U height, the series measures 102mm x 41mm x 340mm [4.02" x 1.61" x 13.39"] (WxHxD) and weighs 2.3kg max.

The series is ideal for industrial applications, including measurement and analysis equipment, machine tools, semiconductor manufacturing equipment, battery chargers, and power amplifiers. The power supplies comply with the RoHS directive, and they are CE and UKCA marked in accordance with the Low Voltage Directive.