NCP5008_06 Datasheet, PDF (1/17 Pages) ON Semiconductor – Backlight LED Boost Driver

NCP5008, NCP5009
Backlight LED Boost Driver
The NCP5008/NCP5009 is a high efficiency boost converter
operating in current loop control mode to drive Light Emitting
Diode. The current mode regulation allows a uniform brightness of
the LEDs.
Features
• 2.7 to 6.0 V Input Voltage Range
• Output Voltage from V_bat to 15 V
• 3.0 mA Quiescent Supply Current
• Automatically LEDs Current Matching
• No External Sense Resistor
• Includes Dimming Function
• Programmable or Automatic Current Output Mode
• LOCAL or REMOTE Control Facility
• Photo Transistor Sense Feedback Input
• Inductor Based Converter brings High Efficiency
• Low Noise DC/DC Converter
• All Pins are Fully ESD Protected
• Pb−Free Package is Available
Typical Applications
• LED Display Back Light Control
• High Efficiency Step Up Converter
V_bat
R1
30 k
GND
U1
1 _Iref
2
PHOTO
C1
V_bat ¹⁰
9
L1
10 mF/6.3 V
GND
Q1
NPN−PHOTO
V_bat
GND
Vcc
4
3
5
VBIAS
CS
CLK
NCP5009
D1
D2
8
L2
7
GND
6
LOCAL
D3
D4
L1
22 mH
D5 MBR0520
GND
LED
LED
LED
LED
GND
C2
GND
2.2 mF/16 V
Figure 1. Typical Battery Powered LED Boost Driver
http://onsemi.com
MARKING
DIAGRAM
Micro 10
DM SUFFIX
5Tx
AYW G
1
CASE 846B
G
1
5Tx = Device Number
x = 8 or 9
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
I_ref 1
NC ₂
CS 3
VBIAS 4
CLOCK 5
10 V_bat
9 ^L1
8 L2 Iout
7 GND
6 LOCAL
NCP5008
I_ref 1
Photo ₂
CS 3
VBIAS 4
CLOCK 5
10 V_bat
9 L1
8 L2 Iout
7 GND
6 LOCAL
NCP5009
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5008DMR2
NCP5008DMR2G
Micro 10 4000 / Tape & Reel
Micro 10 4000 / Tape & Reel
(Pb−Free)
NCP5009DMR2 Micro 10 4000 / Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2006
1
April, 2006 − Rev. 7
Publication Order Number:
NCP5008/D