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NCP5008 Datasheet(PDF) 1 Page - ON Semiconductor

Part # NCP5008
Description  Backlight LED Boost Driver
PDF  20 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP5008 Datasheet(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2003
August, 2003 − Rev. 4
1
Publication Order Number:
NCP5008/D
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
Typical Applications
• LED Display Back Light Control
• High Efficiency Step Up Converter
Figure 1. Typical Battery Powered LED Boost Driver
Iref
PHOTO
L2
CS
CLK
1
2
Q1
NPN−PHOTO
GND
4
Vbat
3
5
6
LOCAL
GND
7
4
8
GND
L1
9
Vbat
10
R1
30 k
GND
Vcc
GND
NCP5009
L1
22
mH
Vbat
C1
10
mF/6.3 V
GND
D5 MBR0520
LED
D1
LED
D2
LED
D3
LED
D4
2.2
mF/16 V
C2
GND
U1
VBIAS
Micro 10
DM SUFFIX
CASE 846B
PIN CONNECTIONS
Iref
Vbat
NC
CS
VBIAS
L1
L2 Iout
GND
110
2
3
4
9
8
7
10
1
5Tx
AYW
MARKING
DIAGRAM
x
= Device Number 8 or 9
A
= Assembly Location
Y
= Year
W
= Work Week
CLOCK
5
LOCAL
6
Iref
Vbat
Photo
CS
VBIAS
L1
L2 Iout
GND
110
2
3
4
9
8
7
CLOCK
5
LOCAL
6
NCP5008
NCP5009
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
ORDERING INFORMATION
http://onsemi.com


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