NCL30100_11 Datasheet, PDF (1/27 Pages) ON Semiconductor – nuFixed 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) AAAAYWG
SN SUFFIX
G
1
CASE 318G ₁
AAA = Specific Device Code
A =Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
CS 1
6 Gate
GND 2
CT 3
5 V_CC
4 IVC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCL30100SNT1G TSOP−6 3000 / Tape & Reel
(Pb−Free)
†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, 2011
1
January, 2011 − Rev. 3
Publication Order Number:
NCL30100/D