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Agilent Technologies 664xA, 665xA, 667xA Output Isolation, Load Considerations, Capacitive Loads

Models: 668xA 669xA 667xA 664xA 665xA

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Connecting Series 664xA and 665xA Power Supplies to the Load

 

 

 

Output Safety Cover

+ Output Terminal

- Output Terminal

Signal Common

Output Sense Switch

Analog Connector

Figure 4-3a. Series 664xA and 665xA Rear Panel Output Connections

Output Isolation

The output of the power supply is isolated from earth ground. Either output terminal may be grounded, or an external voltage source may be connected between either output and ground. However, both output terminals must be kept within

±240 Vdc of ground. An earth ground terminal is provided on the rear panel for convenience, such as grounding wire shields.

The earth ground terminal on the rear panel is a low-noise signal ground for convenience only. It is not designed to function as a safety ground.

Load Considerations

Capacitive Loads

Effect on the Output Circuit. In most cases, the power supply will continue to be stable with additional external load capacitors (see the following table for recommendations). However, large load capacitors may cause ringing in the supply's transient response. It is possible that certain combinations of load capacitance, equivalent series resistance, and load lead inductance will result in instability. If you need help in solving a stability problem, contact an Agilent service engineer through your local Sales and Support Office (see end of this guide).

 

 

Series 664xA/665xA Power Supplies, Maximum External Capacitance (∝F)

 

6641A

6642A

6643A

6644A

6645A

6651A

6652A

6653A

6654A

6655A

40,000

20,000

12,000

7,000

3,000

100,000

50,000

30,000

18,000

8,000

If the power supply output is rapidly programmed into capacitive loads, the supply may momentarily cross into CC mode. This extends the CV programming time and limits the maximum slew rate to the programmed current divided by the total internal (see the following section “Inductive Loads”) and external capacitance. These momentary crossovers into CC mode will not damage the supply.

Effect on the OVP Circuit. The OVP circuit is designed to discharge fully-charged capacitances up to a specified limit for each model. These limits are as follows:

User Connections 61

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Agilent Technologies 664xA, 665xA, 667xA Output Isolation, Load Considerations, Capacitive Loads, 6651A 6652A 6653A 6654A
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668xA, 669xA, 667xA, 664xA, 665xA specifications

Agilent Technologies has long been a pioneer in the production of high-performance electronic test and measurement instruments, particularly in the field of power sources. Among its notable offerings are the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA series of power supplies. These instruments are designed to provide stable, reliable power for a variety of applications, including electronic testing, industrial processes, and research laboratories.

The Agilent 667xA series is characterized by its programmability and advanced measurement functions. These power supplies support a wide range of output voltages and currents, allowing for flexible configurations that cater to different testing needs. The built-in measurement capabilities enable users to monitor the voltage, current, and power with high precision, which is essential for ensuring optimal performance in electronic applications.

The Agilent 669xA series stands out with its high-power outputs, making it suitable for demanding applications. These power supplies deliver high voltage and current levels, making them ideal for testing high-performance devices, such as power amplifiers and motor drives. Additionally, the 669xA series includes features such as overvoltage protection and complex output sequencing to enhance the safety and reliability of the testing process.

The Agilent 665xA and 664xA series focus on delivering high accuracy and excellent regulation. These models are particularly known for their low noise operation, which is critical for sensitive applications where precision is paramount. The integrated programming capabilities allow users to automate testing sequences, thus improving efficiency in research and development settings.

The 668xA series features advanced digital signal processing that enhances the precision and stability of the output. Users benefit from features like remote sensing and monitoring, allowing feedback adjustments that maintain output accuracy despite cable losses. Furthermore, the 668xA models can integrate seamlessly with various test environments thanks to their LAN, GPIB, and USB connectivity options.

Overall, the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA power supplies provide a comprehensive range of solutions for diverse electronic testing needs. With their advanced features, superb measurement capabilities, and robust performance, these instruments empower engineers and researchers to conduct their work with confidence, precision, and efficiency.