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NCP5010_06 Datasheet, PDF (1/18 Pages) ON Semiconductor – 500 mW Boost Converter for White LEDs | |||
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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 highâefficiency for use in portable
applications and is capable of providing up to 500 mW output power
to 2â5 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 includes TrueâCutoff 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 FlipâChip package. The device
has been optimized for use with small inductors and ceramic
capacitors.
Features
http://onsemi.com
MARKING
DIAGRAM
A1
8âPin FlipâChip
FC SUFFIX
1
CASE 499AJ
DAXG
AYWW
DAX
G
A
Y
WW
= Specific Device Code
= PbâFree Package
= Assembly Location
= Year
= Work Week
⢠2.7 to 5.5 V Input Voltage Range
⢠Efficiency: 84% for 5 LED (VF = 3.5 V by LED) at 30 mA and
4.2 V VIN
⢠Low Noise 1 MHz PWM DCâDC Converter
⢠Open LED Protection and Short Circuit Protection
⢠Serial LEDs Architecture for Uniform Current Matching
⢠1 mA Shutdown Current Facility with TrueâCutoff
⢠Very Small 8âPin FlipâChip 1.7 x 1.7 mm Package
⢠This is a PbâFree Device
PIN CONNECTIONS
A1 A2 A3
AGND CTRL NC
B1
B3
VIN
FB
C1 C2 C3
VOUT SW PGND
Typical Applications
Top View
⢠White LED Backlighting for Small Color LCD Displays
⢠Cellular Phones
⢠Digital Cameras
⢠MP3 Players
⢠High Efficiency Stepâup Converter
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
90
80 VOUT = 5 LED (18 V)
70
VOUT = 3 LED (11 V)
60
50
40
30
20
10
VIN = 4.2 V
0
1
10
100
IOUT (mA)
Figure 1. Efficiency vs. Output Current
© Semiconductor Components Industries, LLC, 2006
1
August, 2006 â Rev. 1
Publication Order Number:
NCP5010/D
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