27
If the ratio L/(R1 + Rs) is less than 0.005, the dc source can reliably drive the load.
INH/FLT Connections
HP 6634B
HP 6633B
HP 6632B and 66322A
HP 6631B
The ratio of the load inductance (L) to the sum of the Equivalent Series Resistance (ESR) for the load (R1) and dc source (Rs), determines whether the source can drive a load without becoming unstable. To help determine this ratio, the value of Rs is listed as:
0.1 ohm.
0.2 ohm.
1.0 ohm.
2.0 ohm.
Inductive Loading
Fast mode is recommended for driving inductive loads, although you will typically experience stable conditions in Normal mode. Inductive loads present no loop-stability problems in constant voltage operation, but may cause problems in constant current operation if the load impedance is outside the boundaries mentioned below.
HP 6634B
HP 6633B
HP 6632B and 66322A
HP 6631B
In Fast mode, the dc source can maintain stability only for small capacitive loads. These limits are: 2.2 μF.
1.0 μF.
0.22 μF.
0.10 μF.
Installation - 3
Fast/Normal Operation
A switch on the rear of the unit lets you switch between operating in either Fast mode or Normal mode. When set to Fast mode, this switch disconnects the output capacitor that is located inside the unit. Fast mode lets you improve or enhance certain operating characteristics; while at the same time degrading other operating characteristics.
1. In Fast mode, the programming time for voltage programming is faster than for normal operation, however, output noise is greater.
2. In Fast mode, the absence of the internal output capacitor results in increased output impedance and therefore, greater stability when driving inductive loads. Conversely, the addition of external capacitive loads in Fast mode will reduce the stability of the unit during constant voltage operation.
3. In Normal mode, the internal output capacitor helps control peak voltage excursions away from the the nominal value for sudden changes in load current. In Fast mode, larger peak voltage excursions will show up at the output of the unit during sudden load current changes.
Capacitive Loading
In Normal mode, the dc source will be stable for many load capacitances, however, large load capacitances may cause ringing in the dc source’s transient response. If this occurs, the problem may be solved by increasing or decreasing the total load capacitance.
Page 26 Page 28
Page 27
Image 27
HP 6634B, 6633B, 6632B, 6631B manual
Page 26 Page 28

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.
Top Page Image Contents