High-speed DC load addresses PoL converter test challenges

October 06, 2016 // By Graham Prophet
Interpro Systems' EL 2000 HS modules minimize inductance, resistance and noise in fast slew rate DC load testing; the 40W unit features 50 MHz measurement bandwidth, offers 40 A/µsec rise time, and 20A sinking for sub-1V loads

The electronic DC load joins a range of power system automatic test equipment (ATE). It is a stand-alone 40W load module providing point-of-load (POL) connections and point-of-use (POU) for fast slew rate DC loading. Ever-higher switching speeds and lower operating voltages present unique challenges in testing POL/POU power conversion systems, Interpro notes. The EL 2000 HS load offers a smart on-board load head that minimizes inductance, resistive losses and noise, which pose serious problems with loads using wires to connect the load to the device-under-test (DUT). In addition, the EL 2000 HS is designed for sub-1V testing to meet the demands of low-voltage devices.

 

The EL 2000 HS’s standalone modular POU design, along with its smart on-board load head, allows for positioning the load to DUT without the need for customization. The standard load offers four programmable modes of operation: constant current, constant resistance, constant power and constant voltage. All have a 50 MHz measurement bandwidth with a 150 Msample/sec, 14-bit digitizer. Measurements include voltage, current, power, noise, settling time and overshoot/undershoot for both V and I. The standard 20V/20A/40W module can sink 20A with only 0.3V applied to the load head. In constant-current mode the module achieves 40 A/µsec rise time with a 20A load for high-speed pulse loading when conducting real load simulation of high-bandwidth devices. Ethernet control is by Intepro’s PowerStar software package or third-party software.

 

Intepro Systems; www.inteproATE.com