This document describes the specifications, theory of operation, testing and construction of the NCL30073LED1GEVB evaluation board. The evaluation board demonstrates a 15 W high PF flyback LED driver for a typical downlight application.
This manual covers the specification, theory of operation, testing, and construction of the NCL30073LED1GEVB evaluation board. The board demonstrates a 15 W high power factor flyback LED driver for a typical downlight application.
It includes a schematic, bill of materials, PCB fabrication notes, test procedure, and test data. Key features include low parts count, TRIAC dimmer compatibility, high power factor, and integrated fault protection.
| Input voltage | 108-132 V ac |
|---|---|
| Line frequency | 60 Hz |
| Power factor (100% load) | 0.9 Min |
| Minimum output voltage | 36 V dc |
| Output ripple | 13% Pk-Pk |
| Output current | 415 mA dc ±5% |
| Efficiency | 85.7% Typ. |
| Start up time | <100 msec Typ. |
The board supports an input voltage of 108-132 V ac.
The typical efficiency is 85.7%.
The output current is set by the value of Rsens.
The OVP threshold is 25 V on the Vcc pin of U2.