Utilizing the latest optimized, digitally controlled power switching topology and WBG (Wide Band Gap) semiconductors, the power supply delivers up to 94% efficiency at 400 V AC input and 65 V DC output. The HFA3500TF is available in two output voltages, 48 V DC and 65 V DC, adjustable between +15% and -50% via the trim function.
The compact, low-profile design is only 41 mm (1.61 in) high with the cover and features two variable-speed cooling fans. For higher power applications, up to ten HFA3500TF units can be paralleled to deliver up to 31.5 kW.
The HFA3500TF's low-profile design fits within the vertical space of a 1U rack unit (44.45 mm), which is advantageous in space-constrained applications and facilitates integration into compact machines. To ensure maximum performance and reliability in such a low-profile package, the power supply has been engineered for high efficiency and optimized to eliminate hot spots and facilitate cooling of all components. To achieve this, the HFA3500TF combines a robust mechanical design with the latest advancements in power electronics, including an optimized, digitally controlled switching topology and a power stage with silicon carbide (SiC) MOSFETs and diodes, delivering up to 94% efficiency at 400 V AC input for the 65 V output model.
Industrial equipment can be installed worldwide and powered from 200V to 400V networks, requiring the power supply to operate within a wide range of input voltages. In addition to reducing single-phase peak loads and optimizing load balancing in their networks, system architects prefer three-phase power solutions, for which the COSEL HFA3500TF is designed to accommodate either three-phase delta or three-phase wye configurations.
With an input voltage range of 180 to 528VAC, the HFA3500TF is available in two different output voltages, adjustable via the built-in potentiometer or trimming function. The 48VDC/73A unit is adjustable from 24.00 to 55.20VDC, and the 65VDC/54A model from 32.50 to 74.75VDC. Under rated operating conditions, the output power is 3.5 kW.
In addition to the main output, the HFA3500TF includes a 12VDC/1A auxiliary output that can be used for remote ON/OFF control. The auxiliary output is isolated from the input, output, and functional ground.
The HFA3500TF includes inrush current limiting circuits, overcurrent and overvoltage protection, and thermal protection. Offering versatility and robustness, the power supplies can operate in an ambient temperature range of -10°C to +70°C. Two automatically controlled cooling fans ensure proper ventilation of the unit, but power reduction may be necessary depending on the final assembly of the equipment and ambient conditions.
For system integration and to reduce conducted noise, the HFA3500TF includes an input filter and complies with FCC Part 15 Class A, VCCI Class A, CISPR11 Class A, CISPR32 Class A, EN55011-A, and EN55032-A standards.
The HFA3500TF has an input-to-output isolation of 4,243 VAC, an input-to-ground (FG) isolation of 2,829 VAC, and an output-to-ground (FG) isolation of 2,000 VAC. In accordance with IEC 62368-1, at its rated load and with a 480 VAC, 60 Hz power supply, the leakage current is a maximum of 3 mA.
Designed for integrated 1U industrial applications, the HFA3500TF measures 110 x 41 x 468 mm [4.33 x 1.61 x 18.43 in] (W x H x D) and weighs a maximum of 3 kg.
The 48 VDC output of the HFA3500TF-48 is suitable for a wide range of applications, including measurement and analysis equipment, machine tools, and semiconductor manufacturing equipment that must withstand voltage drop immunity conditions such as those specified by SEMI F47. The 65 VDC output of the HFA3500TF-65 is ideal for powering radio frequency power amplifiers (RFPAs) as well as 60 V lithium-ion battery chargers.
The HFA3500TF complies with UL62368-1, EN62368-1, and C-UL safety standards (equivalent to CAN/CSA-C22.2 No. 62368-1), as well as RoHS and Low Voltage Directives, and is CE and UKCA marked.
The HFA3500TF is intended for applications that allow fan cooling, but for certain industrial applications such as welding robots, machine tools, and electrolyzers that often operate in harsh, unventilated environments, COSEL offers the HCA3500TF, which is designed for conduction cooling of the base plate.
