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NJW4605-T fiches techniques PDF

New Japan Radio - I2C Controlled White LED Driver IC

Numéro de référence NJW4605-T
Description I2C Controlled White LED Driver IC
Fabricant New Japan Radio 
Logo New Japan Radio 





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NJW4605-T fiche technique
NJW4605-T
I2C Controlled White LED Driver IC for Backlight
GENERAL DESCRIPTION
The NJW4605 is a high efficiency multiple strings white LED driver for
backlight. This device is composed with 3-channel constant current drivers,
step-up switching regulator that can drive up to 24pcs LED.
Each constant current driver is able to supply maximum current of 80mA
per channel. And the accuracy of supply current between each driver is
±2.0% (max.) controlled by high precision current control circuit. The
NJW4605 can control luminance by PWM signal input, and also features
variable switching frequency between 300kHz and 1MHz.
When an abnormal LED lighting occurs, the FLT Pin sends out signals
notifying the abnormality to the controller such as CPU. The NJW4605
operates over a wide supply voltage range from 6V to 30V, and operating
temperature is up to 105ºC.
This very wide operating temperature range makes the IC ideal for
medium sized LCD backlights, such as car navigations, note PC, and
applications for amusement device.
FEATURE
Operating Voltage Range
6.0V to 30V
Constant Current Driver 10mA to 80mA (each channel)
LED Current
Switching Frequency
±2% max. (@ILED=40mA)
300kHz to 1MHz
I2C BUS Control
Luminance Control with PWM technique
Soft-start Function
FAULT Signal Output
LED Open / Short Protection
PWM Luminance Duty Ratio 0.1% Setting Available @ fPWM=200Hz
Over Current Protection
Over Voltage Protection
Under Voltage Lock Out Circuit
Thermal Shutdown Circuit
Package
SSOP32
PACKAGE OUTLINE
NJW4605V
Ver.2013-09-18
-1-

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