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.
http://onsemi.com
Features
• 2.7 to 6.0 V Input Voltage Range
MARKING
DIAGRAM
• Output Voltage from V to 15 V
bat
• 3.0 mA Quiescent Supply Current
• Automatically LEDs Current Matching
• No External Sense Resistor
Micro 10
DM SUFFIX
CASE 846B
5Tx
AYW G
G
• Includes Dimming Function
1
1
• 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
5Tx = Device Number
x = 8 or 9
A
Y
W
G
= Assembly Location
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
Typical Applications
• LED Display Back Light Control
• High Efficiency Step Up Converter
I
1
2
3
4
5
10
9
V
bat
ref
NC
CS
L1
V
bat
8
L2 Iout
GND
VBIAS
CLOCK
7
C1
6
LOCAL
U1
R1
30 k
1
2
10
9
10 mF/6.3 V
NCP5008
I
V
bat
ref
GND
PHOTO
L1
GND
Q1
I
1
2
3
4
5
10
9
V
ref
bat
Photo
CS
L1
L1
8
L2 Iout
GND
V
bat
22 mH
NPN−PHOTO
VBIAS
CLOCK
7
GND
6
LOCAL
Vcc
D5 MBR0520
GND
4
3
5
8
7
6
NCP5009
VBIAS
CS
L2
GND
CLK
LOCAL
ORDERING INFORMATION
NCP5009
D2
†
Device
Package
Shipping
D1
LED
D3
D4
LED
NCP5008DMR2
Micro 10
4000 / Tape & Reel
4000 / Tape & Reel
LED
LED
Micro 10
NCP5008DMR2G
GND
C2
(Pb−Free)
4000 / Tape & Reel
NCP5009DMR2
Micro 10
2.2 mF/16 V
GND
†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.
Figure 1. Typical Battery Powered LED Boost Driver
©
Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
April, 2006 − Rev. 7
NCP5008/D