NCL30002
http://onsemi.com
16
MFP
COMP
EA
+
gm
UVP
+
OVP
+
OVP Fault
(Enable EA)
UVP Fault
C
COMP
V
Control
V
REF
Bias
R
1
R
2
R
FB
+
+
+
V
OVP
V
UVP
POWER GOOD
Shutdown
Figure 29. MultiFunction Pin Operation
The positive input of the transconductance amplifier is
connected to a 2.51 V (nominal) reference. A filtered line
feed-forward signal (see Figure 2) is connected to the
negative input of the error amplifier and used to control the
on-time of controller.
V
CC
Management
The NCL30002 incorporates a supervisory circuitry to
manage the startup and shutdown of the circuit. By
managing the startup and keeping the initial startup current
at less than 35 mA, a startup resistor connected between the
rectified ac line and V
CC
charges the V
CC
capacitor to
V
CC(on)
. Turn on of the device occurs when the startup
voltage has exceeded 12 V (nominal) when the internal
reference and switching logic are enabled. A UVLO
comparator with a hysteresis of 2.5 V nominal gives ample
time for the device to start switching and allow the bias from
the auxiliary winding to supply V
CC.
Design Tool
The NCL30002 implements a unique control method to
achieve high power and superior current regulation even
though the average current is not directly sensed. There are
a number of design tradeoffs that can be made between peak
switch current, inductor size, and desired power factor that
can impact the current regulation accuracy, efficiency, and
physical size. These tradeoffs can be made by adjusting the
amount of line feed forward applied, selecting the amount of
time where the controller is operating in mode 2 and 3, as
well as factoring in the LED forward voltage range. To
simplify the component selection process and allow the
designer to interactively make these tradeoffs,
ON Semiconductor has developed an EXCELt based
Design Guide which allows step-by-step analysis. This tool
is available at onsemi.com along with a supporting
application note that illustrates a complete design and
provides typical application performance.
NCL30002
http://onsemi.com
17
PACKAGE DIMENSIONS
SOIC8 NB
CASE 75107
ISSUE AK
SEATING
PLANE
1
4
58
N
J
X 45
_
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
6. 75101 THRU 75106 ARE OBSOLETE. NEW
STANDARD IS 75107.
A
B
S
D
H
C
0.10 (0.004)
DIM
A
MIN MAX MIN MAX
INCHES
4.80 5.00 0.189 0.197
MILLIMETERS
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020
G 1.27 BSC 0.050 BSC
H 0.10 0.25 0.004 0.010
J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050
M 0 8 0 8
N 0.25 0.50 0.010 0.020
S 5.80 6.20 0.228 0.244
X
Y
G
M
Y
M
0.25 (0.010)
Z
Y
M
0.25 (0.010) Z
S
X
S
M
____
1.52
0.060
7.0
0.275
0.6
0.024
1.270
0.050
4.0
0.155
ǒ
mm
inches
Ǔ
SCALE 6:1
*For additional information on our PbFree strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
NCL30002/D
PUBLICATION ORDERING INFORMATION
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USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
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Phone: 81358171050
LITERATURE FULFILLMENT:
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Phone: 3036752175 or 8003443860 Toll Free USA/Canada
Fax: 3036752176 or 8003443867 Toll Free USA/Canada
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ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative

NCL30002DR2G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
LED Lighting Drivers Power Factor Offline Buck LED Driver
Lifecycle:
New from this manufacturer.
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