NCP5010 Datasheet, PDF (1/18 Pages) ON Semiconductor – 500 mW Boost Converter for White LEDs

NCP5010
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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. The device can also be configured as a fixed
output voltage boost converter for applications such as OLED bias
where it is capable of generating voltage up to 20 V.
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
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.
http://onsemi.com
MARKING
DIAGRAM
A1
8−Pin Flip−Chip
FC SUFFIX
1
CASE 499AJ
DAX
AYWW
DAX
A
Y
WW
= Specific Device Code
= Assembly Location
= Year
= Work Week
PIN CONNECTIONS
Features
• 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
4.2 V V_IN
• Low Noise 1 MHz PWM DC−DC Converter with Damping Switch
• Open LED Protection and Short Circuit Protection
A1 A2 A3
AGND CTRL NC
B1
B3
V_IN
FB
C1 C2 C3
V_OUT SW PGND
• Serial LEDs Architecture for Uniform Current Matching
Top View
• 1 mA Shutdown Current Facility with True−Cutoff
• Very Small 8−Pin Flip−Chip 1.7 x 1.7 mm Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
Typical Applications
• White LED Backlighting for Small Color LCD Displays
• Cellular Phones
• Digital Cameras
dimensions section on page 16 of this data sheet.
90
80 ^{VOUT = 5 LED (18 V)}
70
V_OUT = 3 LED (11 V)
• MP3 Players
60
• High Efficiency Step−up Converter
50
40
30
20
10
0
1
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
V_IN = 4.2 V
10
100
I_OUT (mA)
Figure 1. Efficiency vs. Output Current
© Semiconductor Components Industries, LLC, 2005
1
December, 2005 − Rev. P2
Publication Order Number:
NCP5010/D