On Semiconductor NCP3066 Evaluation Board NCP3066S3BCKGEVB NCP3066S3BCKGEVB NCP3066S3BCKGEVB Data Sheet

Product codes
NCP3066S3BCKGEVB
Page of 20
©  Semiconductor Components Industries, LLC, 2009
January, 2009 − Rev. 3
1
Publication Order Number:
NCP3066/D
NCP3066, NCV3066
Up to 1.5 A Constant
Current Switching
Regulator for LEDs with
ON/OFF Function
The NCP3066 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
NCP3066 has a wide input voltage up to 40 V to allow it to operate
from a 12 Vac or a 12−36 Vdc supply, commonly used for lighting
applications as well as unregulated supplies such as rechargeable
batteries. The NCP3066 switching regulator can be configured in
Step−Down (Buck), Step−Up (Boost) and Voltage−Inverting
topologies with a minimum number of external components. The
ON/OFF pin provides PWM dimming capability or a low power
shutdown mode.
Features
Integrated 1.5 A Switch
Input Voltage Range from 3.0 V to 40 V
Logic Level Shutdown Capability
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
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
These are Pb−Free Devices
Applications
Automotive and Marine Lighting
Constant Current Source, High Brightness LED Driver
Low Voltage and Landscape Lighting
Ç
Ç
Ç
Ç
Ç
Ç
Ç
Ç
ON/OFF
Ipk
COMP
SWC
SWE
CT
GND
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
V
CC
ON/OFF
V
CC
GND
C
IN
C
T
LED−
LED+
L
1
R
sense
D
1
NCP3066
C
OUT
LED
1
LED
n
Figure 1. Typical Buck Application Circuit
R
s
PDIP−8
P, P1 SUFFIX
CASE 626
http://onsemi.com
MARKING
DIAGRAMS
DFN8
MN SUFFIX
CASE 488AF
SOIC−8
D SUFFIX
CASE 751
1
8
NCP3066
AWL
YYWWG
NCP3066
=  Specific Device Code
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 17 of this data sheet.
ORDERING INFORMATION
ALYWG
G
1
1
8
3066
ALYWG
G
3066
1