Transient Response

NI DC Power Supplies and SMUs Help (NI-DCPower)

Edition Date: January 2018

Part Number: 370736U-01

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In reference to power supplies and SMUs, transient response describes how a supply responds to a sudden change in load. Changes in load current, such as a current pulse, can cause large voltage transients. The transient response specifies how long it takes before the transients recover. The following figure shows how the transient behavior is typically specified. The transient response time specifies how quickly the supply can recover to within a certain voltage (ΔV) when a specific change in load (ΔI) occurs. Some power supplies also specify a maximum transient voltage dip under the same load conditions.

There is a trade-off between transient response and the stability of the supply under a wide variety of loads. To achieve the fastest transient response, a device should have a high gain-bandwidth (GBW) product, but the higher GBW is, the more likely it is that the device will become unstable with certain loads. Thus most devices compromise performance to achieve stability under most conditions. Other devices allow a degree of customization to enable optimization of performance under different circumstances.

Configuring Transient Response

Use the niDCPower Transient Response property or the NIDCPOWER_ATTR_TRANSIENT_RESPONSE attribute to configure transient response.

Support for Configurable Transient Reponse

The following devices do not support this feature: NI PXI-4110/4130/4132, NI PXIe-4112/4113.

Related Topics

Configuring Transient Response

Load Regulation

NI PXI-4130 Output Capacitance Selection

PXIe-4135 Transient Response

NI PXIe-4136/4137 Transient Response

NI PXIe-4138/4139 Transient Response

NI PXIe-4140/4141 Transient Response

NI PXIe-4142/4143 Transient Response

NI PXIe-4144/4145 Transient Response

NI PXIe-4154 Transient Response


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