NCP3065 ON Semiconductor, NCP3065 Datasheet

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NCP3065

Manufacturer Part Number
NCP3065
Description
Up to 1.5 A Constant Current Switching Regulator for LEDs
Manufacturer
ON Semiconductor
Datasheet

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NCP3065, NCV3065
Up to 1.5 A Constant Current
Switching Regulator for LEDs
deliver constant current for powering high brightness LEDs. The
device has a very low feedback voltage of 235 mV (nominal) which is
used to regulate the average current of the LED string. In addition, the
NCP3065 has a wide input voltage up to 40 V to allow it to operate
from 12 Vac or 12 Vdc supplies commonly used for lighting
applications as well as unregulated supplies such as Lead Acid
batteries. The device can be configured in a controller topology with
the addition of an external transistor to support higher LED currents
beyond the 1.5 A rated switch current of the internal transistor. The
NCP3065 switching regulator can be configured in Step-Down
(Buck) and Step-Up (boost) topologies with a minimum number of
external components.
Features
Applications
© Semiconductor Components Industries, LLC, 2007
July, 2007 - Rev. 0
0.15 W
V
The NCP3065 is a monolithic switching regulator designed to
in
Operation with All Ceramic Output Capacitors or No Output Capacitance
(Landscape, Path, Solar, MR16 Replacement)
Integrated 1.5 A Switch
Input Voltage Range from 3.0 V to 40 V
Low Feedback Voltage of 235 mV
Cycle-by-Cycle Current Limit
No Control Loop Compensation Required
Frequency of Operation Adjustable up to 250 kHz
Analog and Digital PWM Dimming Capability
Internal Thermal Shutdown with Hysteresis
Automotive Version Available
Automotive and Marine Lighting
High Power LED Driver
Constant Current Source
Low Voltage LED Lighting
Rs
220 mF
C
in
Figure 1. Typical Buck Application Circuit
V
th
NCP3065
NC
I
V
FB
pk
in
= 0.235 V
SWC
SWE
GND
CT
R
2.2 nF
CT
D
L
22 mF
C
out
0.68 W
R
Cluster
-LED
sense
+LED
LED
1
D
D
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
(Note: Microdot may be in either location)
8
P, P1 SUFFIX
8
MN SUFFIX
NCP3065
A
L, WL
Y, YY
W, WW
G or G
CASE 751
CASE 626
CASE 488
D SUFFIX
SOIC-8
PDIP-8
DFN-8
ORDERING INFORMATION
1
1
1
http://onsemi.com
8
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb-Free Package
Publication Order Number:
1
DIAGRAMS
MARKING
ALYW G
NCP3065
ALYWG
YYWWG
3065
3065
G
NCP3065/D
G
AWL

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NCP3065 Summary of contents

Page 1

... LED string. In addition, the NCP3065 has a wide input voltage allow it to operate from 12 Vac or 12 Vdc supplies commonly used for lighting applications as well as unregulated supplies such as Lead Acid batteries ...

Page 2

... Inverting input pin of internal comparator Inverting Input 6 V Voltage supply Sense Peak Current Sense Input to monitor the voltage drop across an external resistor to limit the peak pk current through the circuit 8 N.C. Pin not connected NCP3065, NCV3065 8 N.C. Switch Collector I Sense 7 pk Switch Emitter Timing Capacitor Comparator 5 ...

Page 3

... This device contains latch-up protection and exceeds 100 mA per JEDEC Standard JESD78. 3. The relation between junction temperature, ambient temperature and Total Power dissipated The pins which are not defined may not be loaded by external signals copper copper area NCP3065, NCV3065 Symbol CII ...

Page 4

... Current Limit Sense Voltage is specified at static conditions. In dynamic operation the sensed current turn-off value depends IPK(Sense) on comparator response time and di/dt current slope. See the Operating Description section for details. 8. NCV prefix is for automotive and other applications requiring site and change control. NCP3065, NCV3065 ( -40°C to +125°C, unless otherwise specified) ...

Page 5

... Darlington Switch Voltage Drop vs. Temperature 2 25°C 1.8 J 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 EMITTER CURRENT (A) E Figure 9. Emitter Follower Configuration Output Darlington Switch Voltage Drop vs. Emitter Current NCP3065, NCV3065 190 180 170 160 150 140 130 120 110 3 7 Figure 6. Oscillator Frequency vs. Supply 1. 5 1.20 1.15 1.10 1.05 1.0 ...

Page 6

... T , JUNCTION TEMPERATURE (°C) J Figure 11. Comparator Threshold Voltage vs. Temperature 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 3.0 Figure 13. Standby Supply Current vs. Supply Voltage NCP3065, NCV3065 0.30 0.28 0.26 0.24 0.22 0.20 0.18 0.16 0.14 0.12 0.10 90 110 130 150 -40 -25 -10 Figure 12. Current Limit Sense Voltage vs 2 Pin Pin 2 = GND 8 SUPPLY VOLTAGE (V) CC http://onsemi ...

Page 7

... OFF 85.7% (typical). The oscillator peak and valley voltage difference is 500 mV typically. To calculate the C value for required oscillator frequency, use the equations found in Figure 22. An online NCP3065 design tool can be found at www.onsemi.com, which adds in selecting component values. Startup Figure 14. Typical Operating Waveforms http://onsemi ...

Page 8

... It is not intended to be used as a replacement for proper heatsinking. NCP3065, NCV3065 LED Dimming The COMP pin of the NCP3065 is used to provide dimming capability. In digital input mode the PWM input signal inhibits switching of the regulator and reduces the average current through the LEDs. In analog input mode a ...

Page 9

... Figures 16 through 24 show the simplicity and flexibility of the NCP3065. Two main converter topologies are demonstrated with actual test data shown below each of the circuit diagrams. (See Notes 9, 10, 11 SWCE * V out t off L(avg (Switch SWCE * V out ...

Page 10

... ON/OFF Figure 17. Buck Demo Board with External Switch Application Schematic This design illustrates the NCP3065 being used as a PFET controller, the design has been optimized for continuous current operation with low ripple which allows the output filter capacitor to be eliminated. Figure 20 illustrates the ...

Page 11

... V , INPUT VOLTAGE (V) IN Figure 20. Efficiency vs. Input Voltage for the 1.5 A Buck Demo Board 350 mA, T out 100 mF Output Capacitor NCP3065, NCV3065 3 Output Cap OUT Figure 19. Efficiency vs. Input Voltage for the 1.5 A Buck Demo Board at I ...

Page 12

... MBRS140LT3G, Schottky diode D2 MMSZ36VT1G, Zener diode 100 mH, DO3340P-104ML Coilcraft Inductor L1 Test Results Test Line Regulation Output Ripple Efficiency NCP3065, NCV3065 L1 100 N.C. SWC 7 2 SWE TCAP V CC ...

Page 13

... Figure 23. Boost Demoboard Layout NCP3065, NCV3065 Figure 24. Efficiency vs. Input Voltage for the Boost Demo Board (6xLED with V OUT http://onsemi.com INPUT VOLTAGE (V) = 350 mA, OUT = 3.6 V 255C F A ...

Page 14

... MMSD4148T1G, Diode BC817-LT1G, SOT23 Test Results Test Line Regulation Output Ripple Efficiency Rload = 0.15 W Short Circuit Current V in NCP3065, NCV3065 MTB30P06V Q4 MMBT3904LT1G Q5 R15 N.C. SWC 7 2 SWE TCAP V CC ...

Page 15

... Figure 26 Buck Demoboard Layout ORDERING INFORMATION Device NCP3065MNTXG NCP3065PG NCP3065DR2G NCV3065MNTXG NCV3065PG NCV3065DR2G †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. NCP3065, NCV3065 ...

Page 16

... F -A- NOTE 2 C -T- N SEATING PLANE 0.13 (0.005) M NCP3065, NCV3065 PACKAGE DIMENSIONS 8 LEAD PDIP CASE 626-05 ISSUE http://onsemi.com 16 NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14 ...

Page 17

... G C SEATING PLANE - 0.25 (0.010 *For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. NCP3065, NCV3065 PACKAGE DIMENSIONS SOIC-8 NB CASE 751-07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1 ...

Page 18

... PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT:  Literature Distribution Center for ON Semiconductor  P.O. Box 5163, Denver, Colorado 80217 USA  Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada  Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada  Email: orderlit@onsemi.com NCP3065, NCV3065 PACKAGE DIMENSIONS 8 PIN DFN, 4x4 CASE 488AF-01 ISSUE ...

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