National Instruments 781155-01

The National Instruments part number 781155-01, also known as the PXIe-4154, is a high-performance PXI Programmable Power Supply specifically designed for advanced battery simulation applications. This instrument features two power supply channels, each capable of delivering a maximum current of 3 A. Its unique capability to simulate the transient response and output resistance of a lithium-ion battery cell makes it indispensable for a range of RF and wireless applications. The PXIe-4154 offers rapid transient response times, enabling minimal voltage dips in reaction to dynamic load current changes, which is crucial for effectively powering devices under test (DUTs) such as RF power amplifiers and mobile devices including cellular handsets.

To enhance the accuracy of battery behavior modeling, the onboard programmable output resistance can replicate a battery's internal resistance. Additionally, the instrument includes integrated current measurement functionality for assessing quiescent and standby currents. A supplemental channel provides an 8 V, 1.5 A testing capability for power management integrated circuits, facilitating comprehensive testing solutions. Users can synchronize outputs and measurements via the PXI backplane, ensuring precise operation alongside digital I/O and RF instrumentation. Safety features include overvoltage protection that disconnects the output if the voltage at the Output + terminal exceeds the programmed level by 2.5 V, ensuring robust operation. The PXIe-4154 guarantees precise voltage regulation with a maximum deviation of 3 mV per amp of output load when utilizing remote sensing. With typical PXI Express power requirements of 5 W at 3.3 V and 46 W at 12 V, along with a maximum source update rate of 1850 updates per second, this device is a vital tool for modern testing environments. The PXIe-4154 has an approximate weight of 19.9 ounces, combining compact form factor with advanced functionality for today's demanding applications.