Keithley 3125 HBLED free download

File name 3125_HBLED.pdf

A G R E AT E R M E AS U R E O F CO N F I D E N C E Accurate, Cost-Effective converted to a current that's measured using an ammeter or one channel of a source- measure unit (SMU). High Brightness LED Reverse Breakdown Voltage Test A negative bias current applied to an HBLED Testing Starts with Device allows probing for its reverse breakdown volt- age (VR). The test current should be set to a level where the measured voltage value no Fundamentals longer increases significantly when current is increased slightly. At higher voltages, large increases in reverse bias current produce insignificant changes in reverse voltage. The VR test is performed by sourcing a low-level Mark Cejer, Marketing Director reverse bias current for a specified time, then Keithley Instruments, Inc. measuring the voltage drop across the HBLED. Results are typically in the tens of volts. H igh brightness light emitting speed system setup and enhance throughput. Leakage Current Testing diodes (HBLEDs) combine high Testing can be done at the die level (both Moderate voltages are normally used to mea- output and high efficiency with wafer and package), or the module / subas- sure the current that leaks across an HBLED long lifetimes. Manufacturers are sembly level. At the module/subassembly when a reverse voltage less t