The HP/Agilent 6681A is a 5000 W single-output DC power supply engineered for high-current automated test equipment and manufacturing environments. It delivers 0–8 VDC at up to 580 A with exceptional load and line regulation, making it suitable for applications demanding stable, programmable power delivery at low voltage and extreme current levels.
Technical Specifications
Electrical Performance
• Output: 0–8 VDC, 580 A maximum (5000 W total)
• Programming accuracy (25 °C ± 5 °C): 0.04% + 8 mV (voltage), 0.1% + 300 mA (current)
• Load/line regulation: 0.002% + 0.3 mV (voltage), 0.005% + 40 mA (current)
• Readback accuracy (25 °C ± 5 °C): 0.05% + 12 mV (voltage), 0.1% + 400 mA (current)
• Output ripple and noise (20 Hz–20 MHz, constant voltage mode): 1.5 mV RMS, 10 mV peak-to-peak
• Transient response: Output recovers to within 150 mV in <900 µs following 50% load step change
• Current derating: Linear 1% per °C from 40 °C to 55 °C
Input & Floating Output
• Input options: 208 VAC (180–235 V, 3-phase) or 400 VAC (360–440 V, 3-phase); 47–63 Hz
• Floating output: ±60 VDC from chassis ground
• Remote sensing: Up to half rated output voltage droppable in each load lead
• Inductive load compensation: Selectable
– Key Features
• Programmable over-voltage, over-current, and over-temperature protection
• Discrete fault indicator and remote inhibit capability
• User-definable power-on state
• Front-panel and digital control via GPIB (IEEE-488.2, SCPI compliant)
• Analog control inputs for voltage and current
• Serial link supports up to 16 units through single GPIB address
• VXIplug&play driver support
• 20 ms average command processing time (direct GPIB connection)
– Interfaces & Control
GPIB interface implements SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, E1, C0 codes. Programming via front panel, analog signals, or SCPI commands over IEEE-488.2.
– Typical Applications
Automated test equipment, production test systems, and laboratory environments requiring precise, high-current DC power delivery with digital programmability and fault protection.
