Keithley 2281S-20-6 - Precision DC Supply and Battery Simulator, 20 V, 6 A

The 2281S-20-6 Battery Simulator and Precision DC Power Supply innovatively integrates battery simulation with the functions of a high-precision power supply. The 2281S-20-6 can analyze the DC current consumption of a device under test and generate a battery model based on a battery charging process, and simulate a battery based on a battery model. The 2281S-20-6 can output 120 W with 20 V and 6 A, and sink current up to 1 A.

Precision DC Power Supply, with DMM-quality High Resolution, Low Current Measurements Capability 

Unlike conventional power supplies, 2281S-20-6 supplies feature up to 120 W, 20 V, and 6 A output and can also make measurements with up to 6½ digits of resolution. Voltage output measurements can be resolved down to 100 μV. These supplies measure load currents from 100 nA to amps. Four load current measurement ranges (10 A, 1 A, 100 mA, and 10 mA) support measuring a device’s full load current, standby mode current, and small sleep mode current with DMM-quality accuracy. The high resolution allows discerning small changes in load currents with confidence. It also makes it possible to make a broad range of measurements or a single range with excellent accuracy across both low and high current values.

Battery Simulation Based on a Battery Model

In the battery simulator function of the 2281S, real battery output performance can be simulated based on a selected battery model. State of Charge (SOC) and voltage open circuit (Voc) can be set to any state to test a device under- test’s (DUT’s) performance at various states of the battery.

Optimized Performance for Production Test

The 2281S-20-6 supplies are as powerful in a production test system as they are flexible on the R&D benchtop. They provide SCPI commands for all measurement functions. In addition, several other features can help minimize test time in automated systems. For example, an external trigger input allows hardware synchronization and control by other instruments in the test system. For the battery test and battery simulator function, the digital I/O can be configured as input or output. If the digital I/O is configured as input, the measurement can be triggered by external signals; if the digital I/O is configured as an output, the digital I/O pin will send out a signal when the measurement is finished. Furthermore, to reduce measurement time, reading speed can be increased by reducing the acquisition time from 16.6 ms (or 20 ms) to 33 μs (40 μs).

A choice of front or rear panel terminals provides enhanced connection flexibility. For maximum voltage accuracy, 4-wire remote sensing ensures that the output voltage programmed is actually the level applied to the load. In addition, the sense lines are monitored in order to detect any breaks in them. These features ensure that any production problems can be quickly identified and corrected.

2281S-20-6 supplies can be controlled via their built-in GPIB, USB, or LAN interfaces. The USB interface is test and measurement system (TMC) compliant. The LXI Core compliant LAN interface supports controlling and monitoring a 2281S-20-6 supply remotely, so test engineers can always access the power supply and view measurements, even if located on a different continent than the test systems.