Agilent/Keysight 6684A DC Power Supply

The Keysight 6684A is a 5120 W single-output DC power supply engineered for research, development, and automated testing environments requiring stable, precisely controlled power delivery. It combines low output ripple and noise with selectable load compensation and acoustic noise reduction through fan-speed control, while supporting direct front-panel operation or remote command via GPIB/SCPI.

Technical Specifications

• Output: 0–40 V, 0–128 A (5120 W total)


• Voltage ripple and noise: 1.0 mV RMS, 10 mV peak-to-peak (20 Hz–20 MHz)


• Current RMS (constant voltage mode): 23 mA


• Programming accuracy: voltage ±(0.04% + 40 mV), current ±(0.1% + 65 mA) at 25 ± 5°C


• Programming resolution: 10.8 mV (voltage), 34 mA (current)


• Output voltage response time: 60 ms (excluding command processing)


• Common-mode noise current: 3 mA RMS, 20 mA peak-to-peak


• Over-voltage protection resolution: 225 mV


• Floating output: ±60 VDC from chassis ground


• Remote sensing: up to half rated voltage drop per load lead AC Input


• 180–235 VAC or 360–440 VAC (three-phase, 47–63 Hz)


• Maximum line current: 27.7 A RMS (180–235 VAC), 14.3 A RMS (360–440 VAC)


• Input power: 6000 W maximum, 160 W at no load Physical & Environmental


• Dimensions: 425.5 mm W × 221.5 mm H × 674.7 mm D


• Weight: 51.3 kg net


• Operating temperature: 0–55°C


• Humidity: maximum 95% non-condensing


• Altitude: up to 2000 m


• Safety Class 1; requires protective earth connection

Key Features

• GPIB interface with IEEE 488.2 and SCPI command support


• Serial link capability: up to 16 units addressable through single GPIB port


• Multiple programming modes: front panel, SCPI commands, or analog control signals (0 to ±5 V)


• Software drivers: IVI-COM and VXIplug&play


• Selectable compensation for inductive load stability

Typical Applications

• Automated test environments and production verification


• R&D power delivery for high-current device testing


• Transient response and load-switching characterization

Compatibility & Integration The 6684A integrates into mixed-signal test systems via GPIB, supporting IVI-COM and VXIplug&play driver architectures. Analog programming inputs enable integration with legacy measurement and control systems without dedicated communication infrastructure.