As the LED driver industry is evolving rapidly, more requirements related to professional LED light applications became popular in the market, uPowerTek provided solutions and updated the datasheets as below.
TLA Parameters.
TLA is Temporal Light Artifacts which is described by PstLM (<80Hz flicker) and SVA (80-2000Hz flicker). Here is the latest requirements of PstLM and SVM
According to NEMA77 (2017 Temporal Light Artifacts: Test Methods and Guidance for Acceptance Criteria)
| Parameter | Indoor | Outdoor |
| PstLM | ≤1.0 | ≤1.0 |
| SVM | ≤1.6 | – |
According to Commission Regulation (EU) 2019/2020:
| Parameter | Limit | Testing Condition |
| PstLM | ≤1.0 | 100% Load |
| SVM | ≤0.4 |
uPowerTek LED drivers are all at least dual stage switching power supply and output ripple is treated carefully, thus the typical TLA parameters are as below.
PstLM<0.02, SVM<0.05, test method according to IEC-61547-1.
And for sports lighting application, there is another parameter which affects the live broadcasting especially for high resolution and high speed camaras, Percentage Flicker, and this parameter is first time formally regulated by a Chinese standard “GB/T38539 Technical requirements for application of LED sports lighting”
And here is the typical PF (percent flicker) value of uPowerTek non-isolated LED drivers for sports lighting:
PF<1% Broadcasting level, according to GB/T-38539-2020
Fast Dimming Options.
Fast dimming is important for good dynamic performance of LED lights, especially for sport lighting applications. Also it is a feature related to lighting control systems, particularly in the context of smart lighting or advanced lighting solutions used in stadiums, buildings, warehouses, or industrial settings. It refers to the capability of a lighting system to quickly and smoothly dim lights in response to commands. And fast dimming normally includes the parameters like on-off transition time and 10-100% output transition time.
| Fast Dimming | Multi-channel drivers and Non-isolated Drivers | Isolated Drivers with -FD0000 Suffix |
| On-Off Transition | 50ms | 300ms |
| 10-100% Io Transition | 30ms | 70ms |
The fast dimming information is updated in Dimming Section of uPowerTek datasheets.
Enhanced PF, THD and Efficiency Curves
MCB (Miniature Circuit Breaker) Calculation
Now the new version datasheets provide the answers directly in the datsheets, as well as the wiring suggestions for 3 phase high input voltage application.
Programming Section
NFC Programmable D4i Dimming APD series datasheets are updated with 1 to X programming introduction. The plastic APD series are the one product family which support 10 pcs driver programmed simultaneously.
