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PDF NCL30100 Data sheet ( Hoja de datos )
| Número de pieza | NCL30100 | |
| Descripción | Fixed Off Time Switched Mode LED Driver Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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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. 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
• 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−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 VCC
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
January, 2011 − Rev. 3
1
Publication Order Number:
NCL30100/D
1 page  
NCL30100
6.260
6.255
6.250
6.245
6.240
6.235
−40 −20 0
20 40 60 80 100 120
TEMPERATURE (°C)
Figure 3. Vstartup Threshold vs. Junction
Temperature
30
28
26
24
22
20
18
16
14
12
10
−40 −20 0
20 40 60 80
TEMPERATURE (°C)
100 120
Figure 4. Startup Current Consumption vs.
Junction Temperature
12.6
12.5
12.4
12.3
12.2
12.1
12.0
11.9
11.8
11.7
11.6
−40
−20 0 20 40 60 80 100
TEMPERATURE (°C)
Figure 5. Minimum Source Current vs.
Junction Temperature
120
5.780
5.775
5.770
5.765
5.760
5.755
5.750
5.745
5.740
−40
−20 0 20 40 60 80 100
TEMPERATURE (°C)
Figure 6. Minimum Operating Voltage
Threshold vs. Junction temperature
120
1.10 50.0
49.5
1.05
49.0
1.00 48.5
48.0
0.95
47.5
0.90
−40 −20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Figure 7. Steady State Current Consumption
vs. Junction Temperature
47.0
−40
−20 0 20 40 60 80 100
TEMPERATURE (°C)
Figure 8. Maximum Source Current vs.
Junction Temperature
120
http://onsemi.com
5
5 Page 
NCL30100
Reverse Buck Operating Description
Figure 23 illustrates a typical application schematic and
Figure 24 displays simplified waveforms illustrate the
converter in steady state operation for critical circuit nodes.
Imag
Vin D1 LED
IC1 Idemag
ICS NCL30100
Rshift
1 CS DRV 6
ICT
2
3
GND
CT
VCC
IVC
5
4
Q1
L1
VCS
Vsense
CT VCT
VDRV
Rsense
Figure 23. Simplified Application Schematic
http://onsemi.com
11
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet NCL30100.PDF ] | |
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