NJW4600 Datasheet, PDF (1/2 Pages) New Japan Radio – White LED Driver for Backlight

U.D.
White LED Driver for Backlight
NJW4600
■ GENERAL DESCRIPTION
The NJW4600 is a high efficiency multiple strings white
LED driver for back light.This device is composed with
4channel constant current drivers and step up switching
regulator, and can drive up to 32pcs. LED.
Each constant current driver is able to supply maximum
of 120mA per channel, and the driver interval is
performed by highly precise current control of ±2% typ.
The NJW4600 can control luminance up to 100 : 4 by
PWM signal input, and also features selectable switching
frequency of 800kHz or 1MHz.
When abnormal LED lighting occurs, the FAULT
terminal sends out signals notifying the abnormality to the
control departments, such as CPU.
The NJW4600 operates over a wide supply voltage
range from 6V to 35V, 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.
■ PACKAGE OUTLINE
NJW4600V
NJW4600KT1
■ FEATURE
▪ Constant Current Driver : 10mA ~ 120mA
▪ LED Current Control : ±2% ( typ. )
▪ Operating Voltage
: 6V ~ 35V
▪ Switching Frequency : 800kHz / 1MHz
▪ LED Open / Short Protection
▪ FAULT Signal Output
▪ Luminance Control with PWM
▪ Internal Soft Start
▪ Under Voltage Lock Out Circuit ( UVLO )
▪ Built in Over Voltage Protection
▪ Built in Over Current Protection
▪ Built in Thermal Shutdown Protection
▪ Package
: NJW4600V SSOP-32
NJW4600KT1 QFN-24
　　　　　　　　　 Ver.2010/09/03　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
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