Result unstable when LED driver is tested with electronic load
It is usually happened that result unstable when LED driver is tested with electronic load. Using appropriate electronic load and adjusting it at suitable operation mode are both important.
To monopole PFC LED driver, as LED driver output ripple is greater than standard AC/DC, it is DC+AC ripple output type, therefore common electronic load will detect the result as AC type incorrectly.
The working status of electronic load should be set in CR mode, not CC or CV mode, this is determined by LED driver feature.
For LED driver is constant current, using CC mode will result in conflict between Led driver constant current and load constant current, this cause LED driver working instability and test failure.
It is suggested to use CR mode of CHROMA 8000 system, also either resistance load or LED lamp can be used in test.