HP / Agilent 6623A Precision System Power Supply, 80W, 3 outputs

The HP/Agilent 6623A is a triple-output precision linear DC power supply rated at 80 W total, designed for benchtop and automated test system integration. This 3U package delivers fully isolated outputs with dual-range capability, allowing flexible configuration across low and high voltage/current combinations. The unit sinks full rated current through its active downprogrammer, enabling rapid voltage transitions. Programming accuracy reaches 0.06% + 19 mV on voltage (low range) and 0.16% + 50 mA on current (low range), while readback voltage accuracy achieves 0.016% + 2 mV (low range). Output ripple and noise stay below 500 µV RMS and 3 mV peak-to-peak in constant voltage mode. Two outputs can be configured in series or parallel for increased voltage or current capability. Programmable over-voltage and over-current protection, plus electronic calibration, are accessible via GPIB. The 6623A executes power-on self-test via GPIB command and supports SCPI commands with VXIplug&play drivers for system integration.

Technical Specifications

Total Power Output: 80 W across three fully isolated outputs

Output Configurations: Low range 0–7 V/5 A (40 W), 0–20 V/2 A (40 W), 0–7 V/10 A (70 W); high range 0–20 V/2 A (40 W), 0–50 V/0.8 A (40 W), 0–20 V/4 A (80 W)

Voltage Programming Accuracy: 0.06% + 19 mV (low range); 50 mV (high range)

Voltage Readback Accuracy: 0.016% + 2 mV (low range); 0.016% + 3.5 mV (high range)

Current Programming Accuracy: 0.16% + 50 mA (low range); 20–100 mA (high range)

Ripple and Noise: 500 µV RMS, 3 mV peak-to-peak (constant voltage, 20 Hz–20 MHz)

Load Regulation (Voltage): 0.5–2 mV

Load Cross Regulation (Voltage): 0.25–1 mV

Line Regulation (Voltage): 0.01%

Floating Voltage: ±240 V DC from chassis ground

Form Factor: 3U rack height

Key Features

Dual-range outputs with automatic range selection

Series/parallel output combination for enhanced flexibility

Fast-acting active downprogrammer with full-current sinking

Programmable OV and OC protection

GPIB interface with SCPI command support

VXIplug&play driver compatibility

Electronic calibration via GPIB

Power-on self-test capability (GPIB-initiated)

Typical Applications Complex system integration, ATE (automated test equipment), component characterization, and bench-level R&D requiring precision multi-rail power delivery with remote control and monitoring.

Compatibility & Integration GPIB connectivity enables integration into instrument racks and automated test frameworks. VXIplug&play drivers streamline software development and system configuration.