NJW4617 Datasheet, PDF (1/4 Pages) New Japan Radio – Constant Current LED Driver with PWM Control

NJW4617
Constant Current LED Driver with PWM Control
GENERAL DESCRIPTION
The NJW4617 is a constant current LED Driver with PWM control.
45V resisting constant current control and PWM control circuit can
be offered with small package.
It can achieve luminance control multiple white or blue and red
LEDs. It can contribute to the reliability improvement of the system
because it has an overcurrent protection and thermal shutdown
circuit.
„ PACKAGE OUTLINE
NJW4617DL3
(TO-252-5)
FEATURES
Operating Voltage Range
2.5V to 40V
Recommended LED Drive Voltage V_LED=40V(max.)
LED Output Current
I_LED=500mA(max.)
Output Current Accuracy
±2.0%
To 11 of White LED can be operated. (at LED Vf=3.4V)
Current Consumption
450µA typ.
With PWM Luminance Control and ON/OFF Control
Internal Over Current Protection Circuit
Internal Thermal Shutdown Circuit
Package
TO-252-5
„ BLOCK DIAGRAM
V_DD
LED
VREF
( 0.2V )
R_S
Current Limit
TSD
LED OVP
Control
Logic
Standby Timer
GND
EN/PWM
„ PIN CONFIGRATION
1: V_DD
2: EN/PWM
3: GND
4: R_S
5: LED
1 2345
* Please note that this device is still under the development and therefore the specifications are subject to change.
Ver.2013-09-24
-1-