3-kW programmable power supplies with dual-sided board coating
TDK-Lambda HWS3000G programmable, AC-DC power supplies have nominal output voltages and output currents that are fully programmable (CV/CC) from zero up to their maximum rating. These new models have an HD option for board coating, and can meet MIL-STD-810G shock and vibration requirements in harsh environments. Their RF option allows reversing airflow direction for compatibility with the user’s end system.
HWS3000G can deliver 1,500W with a low-line, single-phase input voltage (85 to 132 VAC) and 3,000 W at high-line (170 to 265 VAC). Four nominal output voltages, 24, 48, 60 and 130 V, can be programmed to provide 0-28.8 V, 0-52.8 V, 0-66 V, and 0-156 V. Up to three units can be connected in series, or 10 units in parallel. The output voltage slew rate can be digitally programmed and monitored, along with information regarding cumulative operating time, fault log and product identification information. Digital programming can be performed without turning the power supply on.
Output programming can be achieved using a serial RS485 interface (Modbus protocol) or analog 1-5V or 4-20 mA signals. These compact products also feature a variable speed fan with typically 45 dB audible noise at <70% load, and a 25 °C ambient temperature.
HWS3000G also features 5 V, 2 A standby voltage, remote on/off, remote sense, fan fail and power good signals fitted as standard. With efficiencies of up to 93%, internal heating is reduced, allowing reliable operation in a compact package. Its two models can operate in -20 °C (-40 °C start-up) and up to +70 °C ambient temperatures, derating linearly from 50 °C to 50% load at +70 °C. Both models have a seven-year warranty and conservatively rated electrolytic capacitor temperatures for long field life. Their output terminals are user-configurable for horizontal or vertical connections.
Safety certifications include IEC/EN/UL 62368-1 and IEC/EN62477-1 (OVC III) with CE/UKCA marking for low voltage, EMC, and RoHS directives. The units meet EN55032A, EN55011-A and FCC-A conducted and radiated emissions. They also comply with EN 61000-3-2 harmonics and IEC 61000-4 immunity standards.
