HP / Agilent 6621A System Power Supply, 80W, 2 outputs

The HP/Agilent 6621A is a dual-output linear power supply delivering 80 W across two fully isolated channels. Each output operates in dual-range mode: 0–7 V at 0–10 A (low range) or 0–20 V at 0–4 A (high range), with automatic range selection based on programmed parameters. Outputs can be paralleled or series-connected for enhanced flexibility.

Programming accuracy reaches ±19 mV + 0.06% for voltage and ±100 mA + 0.16% for current. Readback precision is ±20 mV + 0.05% (voltage) and ±20 mA + 0.1% (positive current). Ripple and noise remain well-controlled at 500 µV RMS and 3 mV peak-to-peak across the 20 Hz to 20 MHz band. Load regulation holds voltage to 0.5 mV or 2 mV, while line regulation maintains 0.01% stability. Cross regulation between outputs is 0.25 mV or 1 mV.

– Technical Specifications

• Output Capacity: 2 outputs, fully isolated; 80 W total
• Output 1 & 2: 0–7 V, 0–10 A (low range) or 0–20 V, 0–4 A (high range)
• Voltage Accuracy: ±19 mV + 0.06% (programming); ±20 mV + 0.05% (readback)
• Current Accuracy: ±100 mA + 0.16% (programming); ±20 mA + 0.1% (readback, positive current)
• Ripple/Noise: 500 µV RMS, 3 mV peak-to-peak (20 Hz–20 MHz)
• Load Regulation: 0.5 mV or 2 mV (voltage)
• Line Regulation: 0.01% (voltage)
• Cross Regulation: 0.25 mV or 1 mV (voltage)
• Form Factor: 3U high package

– Key Features

• Dual-range automatic selection on each output
• Parallel or series output configuration
• Programmable overvoltage (OVP) and overcurrent (OCP) protection
• Active downprogrammer for fast voltage ramping
• Fast CV/CC crossover transitions
• Remote voltage sensing to compensate lead drops up to 1 V or 10 V
• 10 user-selectable stored/recalled states
• Electronic calibration via GPIB
• Self-test capability at power-on

– Programming & Integration

• GPIB interface (IEEE 488) with full command set support
• SCPI command compatibility
• VXIplug&play driver support
• Local front-panel keypad control
• Fast programmable voltage control with active sinking

– Typical Applications

Automated test systems requiring dual-rail sourcing, DUT validation benches, and laboratory characterization of voltage-sensitive components.