This
document describes a non-isolated, high power factor (PF), TRIAC
dimmable LED driver designed to drive a nominal LED string voltage of
96V at 210 mA from a high line input voltage range of 195 VAC to 265 VAC
(50 Hz typical). The LED driver utilizes the LYT4326E from the
LYTSwitch-4 family of ICs. The topology used is a single-stage
non-isolated buck boost that meets constant current regulation, and
dimming requirements for this design.
Project Description
Figure 1
This document describes a non-isolated, high power factor (PF),
TRIAC dimmable
LED driver designed to drive a nominal
LED string voltage of 96V at 210 mA from a high line input voltage range of 195
VAC to 265
VAC (50 Hz typical). The
LED driver utilizes the LYT4326E from the
LYTSwitch-4
family of ICs. The topology used is a single-stage non-isolated buck
boost that meets constant current regulation, and dimming requirements
for this design.
Figure 2
Features
- Single-stage power factor correction combined with constant current (CC) output
- Fast start-uptime(< 200 ms) –no perceptible delay
- High efficiency > 85 % at 230 VAC
- PF > 0.9at 230VAC
- Output short-circuit protected with auto-recovery
- Auto-recovering thermal shutdown with large hysteresis
Read More…
تصنيف :
