NCL30100 - Fixed Off Time Switched Mode LED Driver Controller

Datasheet Summary

Description

Pin N5 Pin Name Function 1 CS Current sense input 2 GND Ground 3 CT Timing capacitor 4 IVC Input voltage compensation 5 VCC Input supply 6 DRV Driver output Pin Description A resistor divider consisting of R3 and R4 is used to set the peak current sensed through the MOSFET switch Power

Features

Quasi.
Fixed OFF Time, Peak Current Control Method.
N.
FET Based Controller Architecture.
Up to 700 kHz Switching Frequency.
Up to >95% Efficiency.
No Output Capacitor Needed.
VCC Operation from 6.35.
18 V.
Adjustable Current Limit with Negative Sensing.
Inherent Open LED Protected.
Very Low Current Consumption at Startup.
Undervoltage Lockout.
Compact Thin TSOP.
6 Pb.

ON Semiconductor

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Datasheet Details

Part number	NCL30100
Manufacturer	ON Semiconductor
File Size	1.41 MB
Description	Fixed Off Time Switched Mode LED Driver Controller
Datasheet	NCL30100 Datasheet
Additional preview pages of the NCL30100 datasheet.

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Full PDF Text Transcription

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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.

Published: Aug 25, 2010 |