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PDF NJU6043 Data sheet ( Hoja de datos )

Número de pieza NJU6043
Descripción White LED Driver / SOT-23-6(MTP6)
Fabricantes JRC 
Logotipo JRC Logotipo



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No Preview Available ! NJU6043 Hoja de datos, Descripción, Manual

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Preliminary
PWM WHITE LED DRIVER
General Description
The NJU6043 is a high efficiency white LED driver with low
input voltage. It is a PWM type DC/DC converter.
The typical output current is 20 mA. Because the switching
frequency is about 1 MHz, so tiny parts such as inductor and
capacitor can be used to save space.
The NJU6043 is suitable for portable electronic applications
such as cell phone, digital still camera, or PDA etc..
Package
NJU6043
Features
Drive up to 5 white LEDs in series
IOUT = 20mA
High Efficiency
87%
Over Voltage Protection Circuit(OVP)19.5V
Shut-down circuit
Switching Frequency 1MHz (PWM)
Under-voltage lockout circuit (UVLO)
Low profile inductor and capacitor
Operation Voltage
Package
VDD = 2.5 ~ 5.5V
SOT-23 6pin (MTP-6)
CMOS
Pin Configuration
SW 1
VSS 2
FB 3
6 VDD
5 OVP
4 SHNb
SOT-23 6pin (MTP-6)
Block Diagram
VIN
C1
4.7µF/6.3V
SHNb
PWM input
L1
4.7µH
VDD
Bias
Shut down
SW
VSS
D1
OVP
OVP
VOUT
FB
Boost
-
Control
+
OSC
1MHz
VREF
0.25V
RLED
12
C2
1µF/25V
ILED
Ver.2006-06-27
-1-

1 page




NJU6043 pdf
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Typical Performance
Stability for Driving 5 WLEDs
Preliminary
NJU6043
(VDD=3.6V, VSS=0V, L=4.7uH, Ta=25°C)
Stability for Driving 4 WLEDs
Stability for Driving 3 WLEDs
Stability for Driving 2 WLEDs
Inrush Current for Driving 5 WLEDs
Inrush Current for Driving 4 WLEDs
Ver.2006-06-27
-5-

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