NCL30100 Datasheet, PDF (1/27 Pages) ON Semiconductor – Fixed Off Time Switched Mode LED Driver Controller

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 is user adjustable through the
selection of a small external capacitor, thus allowing the design to be
optimized for a given switching frequency range. The control loop is
designed to operate up to 700 kHz allowing the designer the flexibility
to use a very small inductor for space constrained applications.
The device has been optimized to provide a flexible inductive
step--down converter to drive one or more high power LED(s). The
controller can also be used to implement non--isolated buck--boost
driver topologies.
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
 V_CC 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--Free Package
 --40 to + 125C Operating Temperature Range
 This is a Pb--Free Device
Typical Applications
 Low Voltage Halogen LED Replacement (MR--16)
 LED Track Lighting
 Landscape Lighting
 Solar LED Applications
 Transportation Lighting
 12 V LED Bulb Replacement
 Outdoor Area Lighting
 LED Light Bars
http://onsemi.com
MARKING
DIAGRAM
TSOP--6
(SOT23--6, SC59--6) XXXAYWG
SN SUFFIX
G
1
CASE 318G ₁
XXX = Specific Device Code
A =Assembly Location
Y = Year
W = Work Week
G = Pb--Free Package
PIN CONNECTIONS
TSOP--6
CS 1
6 Gate
GND 2
5 V_CC
CT 3
4 IVC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCL30100SNT1G
TSOP--6
(Pb--Free)
3000 /
Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
 Semiconductor Components Industries, LLC, 2010
1
June, 2010 -- Rev. 0
Publication Order Number:
NCL30100/D