Compact programmable power supplies offer constant voltage and constant current operation

TDK Corporation has introduced the 3000W TDK-Lambda brand HWS3000 programmable AC/DC power supplies in a 270mm x 150mm x 61mm case size. The nominal output voltages (24V, 48V, 60V or 130V) and output currents are fully programmable (CV/CC) from zero to their maximum rating. The HWS3000 series is offered with an 85-265VAC single-phase or three-phase 170-265VAC input.

Output programming can be attained using a serial RS485 interface (MODBus protocol) or analog 1-5V or 4-20mA signals. These very compact products also provide a variable speed fan with typically 45dB audible noise at <70% load and a 25C ambient temperature. The power supplies can be employed in various applications, including test and measurement, semiconductor fabrication, RF amplifiers, laser machining, printing, and industrial equipment.

The HWS3000G can deliver 1500W with a low-line single-phase input voltage (85VAC to 132VAC) and 3000W at high-line (170VAC to 265VAC). The HWS3000GT provides 3000W from a three-phase input voltage of 170-265VAC. Four nominal output voltages, 24V, 48V, 60V and 130V, can be programmed to provide 0-28.8V, 0-52.8V, 0-66V, and 0-156V. Up to three units can be connected in series or ten units in parallel. The output voltage slew rate can be digitally programmed and monitored, together with information regarding cumulative operating time, fault log, and product identification information. Digital programming can be performed without turning the power supply on.

A 5V 2A standby voltage, remote on/off, remote sense, fan fail and power good signals are fitted as standard. With efficiencies of up to 93%, internal heating is decreased, enabling reliable operation in the compact package size. The models can operate in -20C (-40C start-up) and up to +70C ambient temperatures, derating linearly from 50C to 50% load at +70C. Both models have a five-year warranty and conservatively rated electrolytic capacitor temperatures for long field life. The output terminals are user-configurable for horizontal or vertical connections.

The input-to-output isolation is 3000VAC, input to ground 2000VAC, and output to ground 1500VAC. The leakage current is <0.85mA, and the maximum operating, transportation and storage altitude is 5000m (2000m for the IEC/EN62477-1 standard).

Safety certifications include IEC/EN/UL 62368-1 and IEC/EN62477-1 (OVC III) with CE/UKCA marking for the Low Voltage, EMC, and RoHS Directives. The units meet EN55032A, EN55011-A and FCC-A conducted and radiated emissions. The series also complies with the EN 61000-3-2 harmonics and IEC 61000-4 immunity standards.