NCL30100
Fixed Off Time Switched
Mode LED Driver Controller
The NCL30100 is a compact switching
regulator controller intended for space constrained constant current high−brightness LED driver applications where efficiency and small size are important.
The controller is based on a peak current, quasi fixed−off time control architecture optimized for continuous conduction mode step−down (buck) operation.
This allows the output filter capacitor to be eliminated.
In this configuration, a reverse buck topology is used to control a cost effective N−type MOSFET.
Moreover, this controller employs negative current sensing thus minimizing power dissipation in the current sense resistor.
The off time ...