1L

Q = R int+ Re xt C

where: C = model-dependent internal capacitance (see below); L = inductance of the load; Rext = equivalent series resistance of the load; Rint = model-dependent internal resistance (see below):

C=

6671A

6672A

6673A

6674A

6675A

44,000 ∝F

44,000 ∝F

12,000∝F

7,000 ∝F

2,100 ∝F

Rint=

1.8 mΩ

2.2 mΩ

4 mΩ

14 mΩ

30 mΩ

If the Q is greater than 0.5, inductive loads will ring with the output capacitance and will be damped according to the following equation:

δ=

Battery Charging

The power supply's OVP circuit has a downprogrammer FET that discharges the power supply output whenever OVP trips. If a battery (or other external voltage source) is connected across the output and the OVP is inadvertently triggered or the output is programmed below the battery voltage, the power supply will sink current from the battery. To avoid this, insert a reverse blocking diode in series with the ⊕ output of the supply. Connect the diode cathode to the + battery terminal and the diode anode to the supply ⊕ output terminal. The diode may require a heat sink.

Local Voltage Sensing

Your power supply was shipped set up for local sensing. This means that the supply will sense and regulate its output at the output terminals, not at the load. Since local sensing does not compensate for voltage drops across screw terminals, bus bars, or load leads, local sensing should only be used in applications that require low output current or where load regulation is not critical.

Local sensing is obtained by connecting the +LS sense terminal to the +S analog connector pin and the pin and the -LSsense terminal to the -S analog connector pin. The power supply is shipped with these connections made.

Note

If the sense terminals are left unconnected, the voltage at the bus bars will increase approximately

 

3 to 5% over the programmed value. Since it is measured at the sense terminals, the voltage readback

 

will not reflect this increased output.

Remote Voltage Sensing

The dashed lines in the wiring diagrams illustrate remote voltage sensing. The remote sense terminals of the power supply are connected directly to the load rather than to the output terminals. This allows the supply to automatically compensate for the voltage drop in the load leads as well as to accurately read back the voltage directly across the load.

Setting Up Remote Sense Operation

Remote sensing is obtained by removing the jumpers connecting the +LS sense terminal to the +S analog connector pin and the -LSsense terminal to the -S analog connector pin. The power supply is shipped with these jumpers connected.

70 User Connections

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Agilent Technologies 665xA, 664xA, 667xA, 669xA, 668xA manual 6671A 6672A 6673A 6674A 6675A, Battery Charging
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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.
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