On Semiconductor NCP3066 Evaluation Board NCP3066SCBCKGEVB NCP3066SCBCKGEVB NCP3066SCBCKGEVB Scheda Tecnica
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NCP3066SCBCKGEVB
© 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.
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.
dimensions section on page 17 of this data sheet.
ORDERING INFORMATION
ALYWG
G
1
1
8
3066
ALYWG
G
3066
1