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NCP5008 Datasheet

  • NCP5008

  • Backlight LED Boost Driver

  • 122.70KB

  • 20頁

  • ONSEMI

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

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