Description
NCP5008, NCP5009 Backlight LED Boost Driver The NCP5008/NCP5009 is a high efficiency boost converter operating in current loop control mode to drive.
Pin Symbol
Type
1 Iref INPUT
2
PHOTO
SIGNAL
3 CS INPUT
4
VBIAS
POWER
5 CLOCK INPUT
6 LOCAL INPUT
7
GND
POWER
8 L2 POWER
9 L1 POWER 10.
Features
* 2.7 to 6.0 V Input Voltage Range
* Output Voltage from Vbat 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 Mo
Applications
* LED Display Back Light Control
* High Efficiency Step Up Converter
Vbat
R1
30 k GND
U1 1 Iref 2
PHOTO
C1
Vbat 10 9
L1
10 mF/6.3 V GND
Q1 NPN
* PHOTO
Vbat
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
MICROCONTROLLER