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PDF NJU6049 Data sheet ( Hoja de datos )

Número de pieza NJU6049
Descripción White LED Driver / VSP10
Fabricantes JRC 
Logotipo JRC Logotipo



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No Preview Available ! NJU6049 Hoja de datos, Descripción, Manual

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NJU6049
PRELIMINARY
High Efficiency White LED Driver
! GENERAL DESCRIPTION
The NJU6049 is a high-efficiency white LED driver. It
contains a high-efficiency step-up DC/DC converter and an
output driver. The IC can output max.18V and drive as many
as 4 white LEDs in series with a constant current, which
guarantees the LEDs with uniform brightness.
The high frequency of the step-up converter permits the
use of small, low-profile inductors and capacitors to
minimize the footprint in space-conscious applications. The
NJU6049 also features low operating voltage of 1.7V and the
small package VSP10.
All of these benefits make the NJU6049 suitable for the
battery-powered portable applications such as cellular phones,
camcorders, PDAs, etc.
! PACKAGE OUTLINE
NJU6049R
! FEATURES
# Drives Up to 4White LEDs in Series
IOUT = 20mA(typical)
# Uses Small Inductor and Capacitors
# 1.7V to 6.5V Operating Voltage for Step-up Circuits (VDD)
# Low Switch RDS (ON)
VSW = 18V, RDS=0.8(ISW=150mA)
# OVP Function
# Shutdown terminal
# CMOS Technology
# Package
: VSP10
! PIN CONFIGURATION (TOP VIEW)
FB 1
NC 2
VSS 3
NC 4
SW 5
10 SHDNb
9 OVP
8 VSS
7 NC
6 VDD
Ver.2005-06-09
-1-

1 page




NJU6049 pdf
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TEST CIRCUITS
OVP Threshold Voltage
VIN
4.7uF
NJU6049
VDD
SHDNb
SW
OVP
NJU6049
FB
VSS
A
A
V
GND
Quiescent Current
VIN A
GND
4.7uF
15
VDD
SHDNb
SW
OVP
NJU6049
FB
VSS
5V
0.3V
Ver.2005-06-09
-5-

5 Page





NJU6049 arduino
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! TYPICAL APPLICATION CIRCUITS
(1) 4 white LEDs
VIN
C1
L1
VDD SW
D1
OVP
VOUT
C2
SHDNb
VSS FB
NJU6049
RLED1
(2) 4 white LEDs & Dimming control by external PWM signal 1
VIN
C1
L1 D1
VDD SW
OVP
VOUT
C2
PWM Input
SHDNb
VSS FB
RLED1
Referential List of External Components
IC1
L1
D1
C1
C2
RLED1
LED1 to 4
Component
LED Driver IC
Inductor
Schottky Diode
Ceramic Capacitor
Ceramic Capacitor
Chip Resistor
White LED
Supplier / Parts Number
Qty Value
NJRC / NJU6049
1-
Murata / LQH32CN100K23 1 10uH
On Semiconductor / MBR0530
1
-
Murata / GRM21BF11A475Z
1 4.7uF/10V
Taiyo Yuden / TMK325BJ105MD
1
1uF/25V
Standard
Nichia / NSCW215T
1 12
4-
Ver.2005-06-09
- 11 -

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