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NCP3065DR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
© Semiconductor Components Industries, LLC, 2009
May, 2009 − Rev. 3
1 Publication Order Number:
NCP3065/D
NCP3065, NCV3065
Up to 1.5 A Constant Current
Switching Regulator for LEDs
The NCP3065 is a monolithic switching regulator designed to
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
• 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
• Operation with All Ceramic Output Capacitors or No Output Capacitance
• Analog and Digital PWM Dimming Capability
• Internal Thermal Shutdown with Hysteresis
• Automotive Version Available
Applications
• Automotive and Marine Lighting
• High Power LED Driver
• Constant Current Source
• Low Voltage LED Lighting
(Landscape, Path, Solar, MR16 Replacement)
Figure 1. Typical Buck Application Circuit
NCP3065
V
in
C
in
220 mF
0.15 W
NC
I
pk
V
in
COMP
C
out
22 mF
V
th
= 0.235 V
2.2 nF
CT
D
D
D
+LED
L
LED
Cluster
−LED
R
sense
0.68 W
SWC
SWE
GND
CT
Rs
R
PDIP−8
P, P1 SUFFIX
CASE 626
http://onsemi.com
MARKING
DIAGRAMS
DFN−8
MN SUFFIX
CASE 488
SOIC−8
D SUFFIX
CASE 751
1
8
NCP3065
AWL
YYWWG
A = Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
ORDERING INFORMATION
3065
ALYWG
G
1
1
8
NCP
3065
ALYW G
G
1
NCV3065
AWL
YYWWG
V3065
ALYWG
G
1
NCV
3065
ALYW G
G
NCP3065, NCV3065
http://onsemi.com
2
Figure 2. Pin Connections
Timing Capacitor
Comparator
Inverting
Input
V
CC
N.C.
I
pk
Sense
GND
Switch Emitter
Switch Collector
(Top View)
4
3
2
1
5
6
7
8
Comparator
Inverting
Input
V
CC
N.C.
I
pk
Sense
Timing Capacitor
GND
Switch Emitter
Switch Collector
(Top View)
Figure 3. Pin Connections
EP Flag
Figure 4. Block Diagram
REFERENCE
COMPARATOR
5
R
S
Q
SET dominant
+
−
7
COMPARATOR
CT
3
0.235 V
8
NCP3065
REGULATOR
TSD
0.2 V
+
−
2
6
R
S
Q
4
1
OSCILLATOR
Switch Collector
Switch Emitter
Timing Capacitor
GND
Comparator Inverting Input
+V
CC
I
pk
Sense
N.C.
SET dominant
PIN DESCRIPTION
Pin No. Pin Name Description
1 Switch Collector Internal Darlington switch collector
2 Switch Emitter Internal Darlington switch emitter
3 Timing Capacitor Timing Capacitor Oscillator Input, Timing Capacitor
4 GND Ground pin for all internal circuits
5 Comparator
Inverting Input
Inverting input pin of internal comparator
6 V
CC
Voltage supply
7 I
pk
Sense Peak Current Sense Input to monitor the voltage drop across an external resistor to limit the peak
current through the circuit
8 N.C. Pin not connected
NCP3065, NCV3065
http://onsemi.com
3
MAXIMUM RATINGS (measured vs. pin 4, unless otherwise noted)
Rating
Symbol Value Unit
V
CC
(Pin 6) V
CC
0 to +40 V
Comparator Inverting Input (Pin 5) V
CII
−0.2 to +V
CC
V
Darlington Switch Collector (Pin 1) V
SWC
0 to +40 V
Darlington Switch Emitter (Pin 2) (Transistor OFF) V
SWE
−0.6 to +V
CC
V
Darlington Switch Collector to Emitter (Pins 1−2) V
SWCE
0 to +40 V
Darlington Switch Current I
SW
1.5 A
I
pk
Sense (Pin 7) V
IPK
−0.2 to V
CC
+ 0.2 V
Timing Capacitor (Pin 3) V
TCAP
−0.2 to +1.4 V
Power Dissipation and Thermal Characteristics
PDIP−8
Thermal Resistance Junction−to−Air
R
q
JA
100
°C/W
SOIC−8
Thermal Resistance Junction−to−Air
R
q
JA
180
°C/W
DFN−8
Thermal Resistance Junction−to−Air
Thermal Resistance Junction−to−Case
R
q
JA
R
q
JC
78
14
°C/W
Storage Temperature Range T
STG
−65 to +150 °C
Maximum Junction Temperature T
J(MAX)
+150 °C
Operating Junction Temperature Range (Note 3)
NCP3065, NCV3065
T
J
−40 to +125
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Pin 1−8: Human Body Model 2000 V per AEC Q100−002; 003 or JESD22/A114; A115
Machine Model Method 200 V
2. 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 in IC is T
J
= T
A
+ R
q
•
P
D
4. The pins which are not defined may not be loaded by external signals
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

NCP3065DR2G

Mfr. #:
Buy NCP3065DR2G
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators 1.5A SW REG FOR LED APPL
Lifecycle:
New from this manufacturer.
Delivery:
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