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LED Drivers

I2C Controlled White LED Driver IC for Backlight

  • Operating Voltage Range (6.0V to 30V)
  • Constant Current Driver (10mA to 80mA (each channel))
  • LED Current (±2% max. (@ILED=40mA))
  • Switching Frequency (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 Outline (SSOP32)
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 105°C.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 Information
Part Number Package OutlinePinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
32-Sn2Bi185Yes-YesDry pack 12a
Sample & Buy
Part NumberPackagesStatusPacking SpecificationSample  Buy   

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