OVP Considerations, Stability | HP 6631B, 6633B, 6632B, 6634B

HP 6631B

HP 6632B and 66322A HP 6633B

HP 6634B

3 - Installation

at the load. When using remote sensing, you must program the OVP trip voltage high enough to compensate for the voltage drop between the output terminals and the load. Also, if the sum of the programmed voltage and the load-lead drop exceeds the dc source's maximum voltage rating, this may also trip the OV protection circuit.

Stability

When the unit is configured for remote sensing, it is possible for the impedance of the load wires and the capacitance of the load to form a filter, which becomes part of the unit's feedback loop. This can degrade the unit's stability and result in poor transient response performance. In extreme cases it may also cause oscillations. The wiring guidelines previously discussed under "Wire Considerations" will eliminate most stability problems associated with load lead inductance. If additional measures are required:

♦keep the load capacitance as small as possible

♦use larger diameter load wires to reduce resistance

OVP Considerations

The dc source's OVP circuit contains a crowbar SCR, which effectively shorts the output of the dc source whenever the OVP trips. If an external voltage source such as a battery is connected across the output and the OVP is inadvertently triggered, the SCR will continuously sink a large current from the battery, possibly damaging the dc source.

To avoid this, program the OVP setting to its maximum value to prevent it from inadvertently tripping. Additionally, an internal fuse is connected in series with the SCR. This fuse will open to prevent large currents from damaging the SCR. If this internal fuse has opened, The FS status annunciator will be set. Refer to the Service Manual for instructions about replacing this fuse.

In addition, the OVP circuit's SCR crowbar has been designed to discharge capacitances up to a specific limit. These limits are:

127,000 μF.

50,000 μF.

20,000 μF.

10,000 μF.

If your load capacitance approaches this limit, it is recommended that you do not intentionally trip the OVP and discharge the capacitance through the SCR as part of your normal testing procedure, as this may lead to long-term failure of some components.

6631B, 6633B, 6634B, 6632B specifications

The HP 6632B, 6634B, 6612B, and 6633B are high-performance programmable power supplies that have gained prominence in various testing and measurement applications. These models are part of the HP 6000 series, which is renowned for its reliability and versatility in providing precision power supply solutions.

The HP 6632B offers a dual-output capability, delivering up to 32 volts and 3 amps per channel. It is designed for applications requiring stable and accurate voltage and current supplies. With features like overvoltage protection and short-circuit protection, it ensures the safety of both the device under test and the power supply itself. The programmable voltage and current settings allow operators to automate their testing procedures, increasing efficiency.

The HP 6634B takes performance a step further with multiple outputs, providing up to 32 volts and 5 amps per channel. This model is particularly suited for applications requiring higher current, especially in battery testing and device characterization. The ability to program the device remotely adds an extra layer of usability, making it ideal for integration into automated testing environments.

The HP 6612B model is tailored for users who require a compact and portable power supply solution. It delivers up to 20 volts and 2 amps. Despite its smaller size, it retains essential features like programmable settings and fast transient response, making it suitable for both educational purposes and field testing scenarios.

For users looking for a versatile, multi-channel solution, the HP 6633B presents itself as an excellent choice. This model offers up to 32 volts and 5 amps across multiple outputs. It supports a wide range of programmable features and has an intuitive interface, making it user-friendly for both beginners and experienced engineers. The robust design of the 6633B ensures reliable performance in demanding environments.

All four models utilize advanced linear power supply technology that minimizes ripple and noise, which is critical for sensitive electronic components. Together, these power supplies provide professionals in research, manufacturing, and testing with the precision they need for their experiments and product developments. The combination of programmability, safety features, and high-performance specifications makes the HP 6632B, 6634B, 6612B, and 6633B essential tools for electronic engineers and technicians.