美国IST-Information Scan Technology, Inc.

CURVE TRACER

The IST 8900 Series is powered by a touch screen PC with Curve Tracer testing software preinstalled. Using the Curve Tracer application, the 8910/8920 is able to generate a single curve or as many as six curves per test cycle. Each curve is plotted from up to 32 different measurements taken by the tester within a test range specified by the user. The data increments can be set for either linear or logarithmic format. The resulting graph shows a precise operating point for a device under a set of changing conditions.

HIGH POWER CONSTANT CURRENT WITH RELAY ASSEMBLY

The 8920 features a high power constant current source that supplies up to 48 units of a 50 A or 100 A current source in parallel, enabling automated high current, high voltage power device testing.

KELVIN TEST FIXTURES FOR HIGH POWER TESTING

The IST 8920 includes specialized test fixtures that make it easy to setup and measure high power devices such as IGBTs, MOSFETs, Transistors, GTOs, SCRs, and Diodes. The test fixtures provide error-free testing while eliminating time consuming setups needed to secure test leads and sources. Using the test fixtures, testing can be performed at currents up to 4800 A and at voltages up to 10 KV.

SWITCHING EFFICIENCY ANALYSIS IN POWER IGBTS & MOSFETS

At low frequencies, conduction loss is the primary driver of power loss in a device and their performance can be assessed by measuring the DC parameters of Vce(sat), Vds(on), and Rds(on). At higher frequencies, the Cies, Coes, and Cres parameters and the device’s input impedance dictate the switching and driving loss.

Devices with heavy power loss will generate excess heat, leading to premature aging of the device and poor performance. The IST 8900 Series is a complete solution that is able to properly test high power devices as part of maintenance and production routines to ensure optimal performance and longevity of power devices used in today’s high frequency switching applications.