Agilent/Keysight 6644A DC Power Supply

The Agilent/Keysight 6644A is a 200 W single-output programmable DC power supply engineered for high-throughput testing and development. It delivers 0–60 V at 0–3.5 A with exceptional voltage stability: ±0.06% + 26 mV programming accuracy and 500 µV RMS ripple. Fast voltage and current programming accelerates test cycles, while programmable over-voltage, over-current, and over-temperature protection safeguard device-under-test assemblies.

The supply integrates front-panel and GPIB/SCPI control, analog voltage and current command inputs, and user-definable power-on configuration.

Technical Specifications

• Voltage: 0–60 V


• Current (40°C): 0–3.5 A


• Current (50°C max): 3.2 A


• Current (55°C max): 3 A


• Power: 200 W Programming Accuracy (25°C ±5°C)


• Voltage: ±0.06% + 26 mV


• Current: ±0.15% + 4.1 mA Ripple and Noise (20 Hz–20 MHz)


• Voltage RMS: 500 µV


• Voltage peak-to-peak: 5 mV


• Current RMS: 1.5 mA

Key Features

• Programmable Over-Voltage Protection (OVP) and Over-Current Protection (OCP)


• Over-Temperature Protection with fast crowbar and mode crossover protection


• Discrete Fault Indicator/Remote Inhibit (DFI/RI) for external control


• Front-panel programming and SCPI command interface via GPIB


• Analog control of voltage and current via external signals


• VXI plug&play drivers supported


• Fan speed control for acoustic noise minimization

System Integration

• Auto-parallel connection of up to three units


• Series or parallel output configuration


• Serial link supports up to 16 power supplies on a single GPIB address

Environmental and Safety Operates indoors, installation category II, up to 95% relative humidity and 2000 m altitude. Safety Class 1 instrument with protective earth terminal; requires grounded power receptacle.