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Benchtop DC Power Supplies
Source multiple channels of safe, clean, and reliable power
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ATE System Power Supplies
Accelerate throughput in a compact, rack-mounted solution
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Specialty Power Solutions
Solve power challenges with application-specific solutions
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Modular Power Solutions
Customize performance and power level to match your test needs
Benchtop DC Power Supplies
Keysight DC power supplies provide stable, precise power for designing, testing, and validating electronic devices across development and production. Choose the performance grade that fits your needs based on maximum power, voltage, current, and elevated measurement capabilities. Explore our broad portfolio of DC power supplies — from Essential to Pro models — to find the ideal DC power supply for your application.
Essential
Starting from
Maximum power
Advanced
Starting from
Maximum power
Expert
Starting from
Maximum power
Pro
Starting from
Maximum powerATE System Power Supplies
Keysight ATE system power supplies accelerate automated test sequences with fast command processing and rapid settling times, reducing overall test duration. Their compact, high-power-density design saves valuable rack space. Ideal for fast, parallel testing, they are optimized for semiconductor, automotive, consumer electronics, and wireless communications applications in both production and development environments. Explore our wide range of ATE system power supplies from Advanced to Pro performance grades to find the one that is right for your application.
Advanced
Starting from
Maximum power
Expert
Starting from
Maximum power
Pro
Starting from
Specialty Power Solutions
Keysight specialty power solutions, including battery emulators, photovoltaic array simulators, HEV / EV power converters, and mobile communication DC sources, provide precise power simulation for testing energy-intensive systems. These solutions enable you to validate critical components in electric vehicles, renewable energy systems, and telecommunications with accurate, real-world conditions. Important for industries like automotive, renewable energy, and consumer electronics, they ensure reliable performance and compliance for next-generation technologies. Explore our wide range of specialty power solutions to find the one that is right for your application.
Modular DC Power Solutions
Keysight modular DC power solutions enable you to optimize performance and power to match test needs in specific applications. Choose your mainframe and select from over 35 modules, including basic, high-performance, precision, source / measure units (SMU), and electronic loads, to create the custom power supply solution you need. With several mainframes and modules to choose from, select the modular DC power solution that is right for your application.
Meet Our New Expert ATE System Power Supplies
Pushing the boundaries of high-power innovation demands test systems built for precision, scalability, and safety. Keysight new Expert ATE System Power Supplies deliver all three with next-generation regenerative sources, electronic loads, and automation-ready control software. Designed for mission-critical validation in aerospace, energy storage, and data center applications, these solutions enable faster, safer, and more energy-efficient testing. With industry-leading accuracy and global compliance, you can validate high-power designs with confidence — and without compromise.
Find compatible software and accessories for your DC power supply
Choose from a wide variety of analysis, control, and application-specific software or accessories like cables, modules, rack mount kits, and more.
Explore DC power supply use cases
DC power supplies support a wide range of applications across various industries, discover them all.
General electronics
Emulate battery environmental characteristics and device current profiles to analyze power usage.
Automotive
Validating EV power converter designs with off-the-shelf test resources.
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Automotive
Test automotive electronic control unit (ECU) performance against various operational conditions.
Wired Communication
Perform power sequencing to ensure the proper functions and safety of devices.
Aerospace and Defense
Simulate all the I-V curves that a satellite will experience with a solar array simulator.
Services and support
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Get predictable, lease-based subscriptions and full lifecycle management solutions—so you reach your business goals faster.
Experience elevated service as a KeysightCare subscriber to get committed technical response and more.
Ensure your test system performs to specification and meets local and global standards.
Make measurements quickly with in-house, instructor-led training, and eLearning.
Download Keysight software or update your software to the newest version.
Frequently asked questions
DC power supplies are segmented between bench versus ATE use cases. Bench power supplies have large, legible displays and a user interface so you can easily control all aspects of the power supply from the front panel. In addition, the output terminals are easily accessible from the front. ATE power supplies are designed to be in a rack and part of an ATE system.
It is critical to select a supply that provides the right amount of power to meet your application needs. Keysight offers low, medium, and high-power solutions from a few watts to hundreds of kW. In selecting a DC power supply, it is also essential to pick one that meets the noise requirements of your application. Some devices, such as audio amplifiers, represent noise-sensitive applications. They require extremely low noise and ripple from a power source. Programming accuracy is also essential for demanding applications requiring the precise setting of voltage and current levels.
Modern DC power supplies are optimized for application-specific testing and analysis for today's devices. For example, measuring parameters such as an IoT device's dynamic current draw to analyze battery drain easily is an important capability.
Another characteristic to consider is the DC power supply's command processing and output response time. Command processing time is how quickly the DC power supply can execute a command, and the output response time is how long it takes for the voltage to transition and settle to the programmed setting. These characteristics determine power supply speed and can significantly affect throughput on a factory line.
Next, do you have an application that uses multiple voltage rails and need to turn the rails on and off in a specific sequence? If so, it is vital to consider a multi-output DC power supply that provides built-in sequencing capability that allows you to precisely control when the outputs turn on and off. And if your test requirements vary in terms of power required, accuracy, or other factors, you should consider a modular DC power supply. Modular DC power supplies allow you to mix and match power levels and performance levels with a single mainframe. You can even integrate electronic loads.
DC power supplies support precise voltage and current control by providing stable, adjustable power for testing circuits, components, and systems. This level of control is essential for accurate and repeatable measurements in applications such as prototyping, troubleshooting, and production testing.
Different DC power supply grades support different levels of test complexity. Together, these DC power supply grades help engineers match the right level of power, current, and control to the application. From basic bench testing to specialized high-performance measurement, DC power supplies make it possible to achieve clean, stable, and precise power delivery across a wide range of test environments.
Connecting two DC power supplies in parallel can be useful for increasing the available current while maintaining the same voltage. However, following proper procedures to ensure safety and avoid damage to the power supplies is crucial. Before connecting power supplies in parallel, consider the following requirements:
- Same voltage rating: Ensure that both power supplies have the same output voltage. Connecting power supplies with different voltages can cause currents to flow from one supply to another, potentially damaging them.
- Same polarity: Both power supplies should have the same polarity for their output terminals (i.e., both should have the positive terminal connected to the positive side of the load and the negative terminal connected to the negative side).
- Current capacity: The combined current output will be the sum of the currents each power supply can provide. Ensure that both power supplies can handle the total current required by the load without exceeding their rated capacities.
Note the following guidelines:
- One output must operate in constant voltage (CV) mode and the other(s) in constant current (CC) mode.
- The output load must draw enough current to keep the CC output(s) in CC mode.
- Only connect outputs that have identical voltage and current ratings in parallel.
- When you use remote sense in a parallel configuration, wire the remote sense terminals on each output in parallel and connect them to the load as shown in the illustration above.
- Keep the wiring from the power supplies to the load as short as possible and twist or bundle the leads to reduce lead inductance and noise pickup. The goal is to minimize the loop area or physical space between the + and - output leads from the power supply to the load.
Set the voltage setting of the supply operating in CV mode slightly lower than the voltage setting of the supplies operating in CC mode. The reason is that the voltage of the supply set is higher, which will push current into the load until it hits CC mode. After the supply reaches CC mode, its output voltage will reduce to the level of the other connected power supply's voltage. Those supplies will then be regulated in CV mode and contribute to the remaining load current. The paralleled supplies must end up in different operating modes, CV or CC. Otherwise, they will fight with each other for control, and one will win, or they will oscillate the control back and forth, which is not desirable.
Vital Considerations:
Load sharing: When connecting two or more DC power supplies in parallel, one of the critical challenges is ensuring that the current is shared equally among them. If the supplies are not perfectly matched in voltage and characteristics, this can lead to one supply delivering more current than the other, which may result in overheating, reduced lifespan, or outright failure of the supplying unit. To mitigate this, consider using small resistors (often called "ballast resistors") in series with each supply to balance the current sharing. By taking these steps, you can achieve a stable and efficient power supply configuration, minimizing the chances of overheating or failure.
Parallel connection risks: Careful consideration is required to ensure safe and effective operation when connecting DC power supplies in parallel. One of the most significant risks involves mismatched voltage ratings. If the voltage outputs of the supplies are not precisely matched, it can lead to various operational issues and potential damage. Best Practices to avoid mismatched voltage risks, such as ensuring identical voltage ratings, implementing load-sharing techniques, using active controllers, and maintaining regular performance monitoring, can significantly reduce these risks and ensure a stable and reliable power supply system.
Use of diodes: In parallel connections of DC power supplies, using diodes is essential to enhance system reliability and protect the power supplies from potential damage. By preventing reverse current flow, diodes help safeguard power supplies from damage, isolate their outputs, and maintain stable operation. Selecting the exemplary diodes based on voltage and current ratings, ensuring proper orientation, and performing regular inspections are crucial to ensure a safe and efficient power supply configuration.
It is crucial to test a power supply with caution. The following are safety tips for testing a DC power supply. If you are unfamiliar with electronic testing, consulting a professional or using pre-built testing equipment is better.
- Proper safety measures must be followed when working with power supplies to prevent accidents, damage to equipment, or injury. One of the most crucial precautions is ensuring the power supply is always turned off before making any connections or disconnections, including attaching or detaching the multimeter or load. Handling the power supply while it’s on can lead to accidental short circuits, electrical shocks, or damage to the testing equipment.
- Power supplies are critical components in electrical and electronic systems, providing energy to power circuits and devices. However, each power supply has defined limitations for voltage and current delivery, and exceeding these limits can result in severe consequences. Never exceed the power supply's rated voltage or current capacity. Each power supply is designed to deliver a maximum safe voltage and current. Pushing beyond these limits can lead to overheating, component failure, or even permanent damage to the power supply. Always check the manufacturer’s specifications and ensure your load remains within safe operating limits.
- Short-circuiting the output terminals of a power supply is one of the most hazardous actions you can take when working with electronic equipment. It can lead to immediate and severe consequences, including damage to the power supply, injury to the user, and risks of fire or electrical hazards. Avoid short-circuiting the output terminals. A direct short circuit across the output of a power supply can lead to immediate damage, potentially causing internal components like fuses, transistors, or capacitors to fail. This can create electrical sparks, heat, or even fire hazards in severe cases. Always handle the connections carefully to prevent accidental short circuits.
A programmable DC power supply is a precision test instrument designed to provide highly stable, accurately controlled direct current (DC) to a Device Under Test (DUT). Unlike a basic manual supply, a programmable unit enables engineers to digitally control, sequence, and automate voltage and current outputs. This capability is foundational to modern electronic design, allowing for the precise characterization of components and seamless integration into Automated Test Equipment (ATE) systems.
Engineers across the semiconductor, automotive, and aerospace industries utilize programmable DC power supplies to solve complex design and manufacturing challenges:
- Design Validation and Margin Testing: Programmatically sweep voltage and current levels to define the operational limits and efficiency of components, ensuring they perform reliably under worst-case scenarios.
- Real-World Transient Simulation: Replicate complex power disturbances such as automotive cranking profiles or voltage drops to verify how a device responds to volatile, real-world power conditions.
- Power Integrity for High-Speed Digital: Provide the ultra-clean, low-noise power required to validate high-speed digital standards (like PCIe 5.0 or DDR5), where even minor power ripple can compromise signal integrity.
- Battery Emulation and Profiling: Simulate the dynamic internal resistance and discharge curves of specific battery chemistries. This is critical for optimizing power consumption in IoT devices, wearables, and Electric Vehicle (EV) systems.
- High-Throughput Manufacturing: Deliver continuous, reliable power for burn-in and life-cycle testing to identify early-life failures and ensure long-term product reliability before shipment.
The main advantage of using a programmable DC power supply is that it delivers precise, controllable DC voltage and current for repeatable testing. Unlike a basic power source, a programmable DC power supply lets engineers set output values, current limits, and operating modes such as constant voltage and constant current to match the requirements of the device under test (DUT).
In test and measurement, this improves accuracy, helps protect sensitive devices, and makes it easier to reproduce the same test conditions from design and debug through validation and production. A programmable DC power supply also supports automated testing through remote interfaces such as USB, LAN, or optional GPIB, helping reduce manual setup time and improve workflow efficiency. Depending on the model, added capabilities can include remote sensing, data logging, LIST mode, output sequencing, and adjustable slew rate for more complex applications.