How to Minimize Voltage Drop in High-Current Systems

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Advanced ATE System Power Supply
+ Advanced ATE System Power Supply
Advanced ATE System Power Supply
+ Advanced ATE System Power Supply

Accurate Voltage at the DUT

In high-current life and durability test systems, maintaining accurate voltage at the device under test (DUT) becomes increasingly challenging as cable lengths and current levels increase. Resistive losses, parasitic inductance, and connection inefficiencies can introduce significant voltage drops, resulting in discrepancies between the programmed output and the actual voltage delivered to the DUT. These effects can compromise test accuracy and lead to invalid performance or reliability conclusions.

To ensure reliable operation, engineers must implement compensation techniques such as remote sensing and optimized power distribution architectures. Proper system design — including cable sizing, layout, and voltage headroom planning — is essential to maintain stable voltage under both steady-state and dynamic load conditions, enabling accurate and repeatable results in long-duration testing environments.

Precision Voltage Delivery Compensation Solution

Maintaining accurate voltage delivery in high-current, long-distance test setups requires power supplies capable of compensating for distribution losses while supporting stable operation under dynamic conditions. The Keysight Advanced ATE system DC power supply provides precise voltage regulation with remote sensing capabilities, enabling real-time compensation for voltage drops across cables and connections. When combined with optimized power distribution techniques, such as proper conductor sizing, bus bar implementation, and voltage headroom planning, this solution ensures stable and accurate voltage at the DUT. Together, these capabilities allow engineers to achieve reliable, repeatable performance in demanding life and durability testing environments.
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Block diagram of precision voltage delivery compensation solution

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