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NCP5010
500 mW Boost Converter for
White LEDs
The NCP5010 is a fixed frequency PWM boost converter with
integrated rectification optimized for constant current applications
such as driving white LEDs. This device features small size, minimal
external components and high?efficiency for use in portable
applications and is capable of providing up to 500 mW output power
to 2?5 series connected white LEDs. A single resistor sets the LED
current and the CTRL pin can be pulse width modulated (PWM) to
reduce the LED Current.
http://onsemi.com
MARKING
DIAGRAM
A1
The device includes True?Cutoff circuitry to disconnect the load
from the battery when the device is put into standby mode. To protect
the device, an output overvoltage protection, and short circuit
1
8?Pin Flip?Chip
FC SUFFIX
CASE 499AJ
DAX G
AYWW
protection have been incorporated. The NCP5010 is housed in a low
profile, space efficient 1.7 x 1.7 mm Flip?Chip package. The device
has been optimized for use with small inductors and ceramic
capacitors.
Features
DAX
G
A
Y
WW
= Specific Device Code
= Pb?Free Package
= Assembly Location
= Year
= Work Week
? 2.7 to 5.5 V Input Voltage Range
? Efficiency: 84% for 5 LED (V F = 3.5 V by LED) at 30 mA and
PIN CONNECTIONS
?
?
?
?
?
?
4.2 V V IN
Low Noise 1 MHz PWM DC?DC Converter
Open LED Protection and Short Circuit Protection
Serial LEDs Architecture for Uniform Current Matching
1 m A Shutdown Current Facility with True?Cutoff
Very Small 8?Pin Flip?Chip 1.7 x 1.7 mm Package
This is a Pb?Free Device
A1 A2
AGND CTRL
B1
V IN
C1 C2
V OUT SW
A3
NC
B3
FB
C3
PGND
Typical Applications
Top View
?
?
?
?
?
White LED Backlighting for Small Color LCD Displays
Cellular Phones
Digital Cameras
MP3 Players
High Efficiency Step?up Converter
90
80
70
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
V OUT = 5 LED (18 V)
V OUT = 3 LED (11 V)
60
50
40
30
20
10
0
V IN = 4.2 V
1
10
I OUT (mA)
Figure 1. Efficiency vs. Output Current
100
? Semiconductor Components Industries, LLC, 2007
March, 2007 ? Rev. 2
1
Publication Order Number:
NCP5010/D
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