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NJU6051

Features: · Drives up to 8 white LEDs (4 series x 2 parallels)VSW = 18.0V(Max.), IOUT = 30mA· Built-in PWM Dimming Control(Selectable 8 out of 64 steps)· Built-in Luminance Sensor Control (Power Supply for Sensor & A/D converter)(No MPU-access required after initial setting)· Built-in Temperat...

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SeekIC No. : 004434402 Detail

NJU6051: Features: · Drives up to 8 white LEDs (4 series x 2 parallels)VSW = 18.0V(Max.), IOUT = 30mA· Built-in PWM Dimming Control(Selectable 8 out of 64 steps)· Built-in Luminance Sensor Control (Power Sup...

NJU6051 Data Sheet

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Part Number:
NJU6051
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Drives up to 8 white LEDs (4 series x 2 parallels)
VSW = 18.0V(Max.), IOUT = 30mA
· Built-in PWM Dimming Control
(Selectable 8 out of 64 steps)
· Built-in Luminance Sensor Control (Power Supply for Sensor & A/D converter)
(No MPU-access required after initial setting)
· Built-in Temperature Compensation Circuit to Suppress the Characteristic Degradation of LEDs
· Uses Small Inductor and Capacitors
· 1.8V to 3.6V Operating Voltage for Logic Circuits (VDDL)
· 3.0V to 5.5V Operating Voltage for Step-up Circuits (VDD)
· CMOS Technology
· Package : QFN20 / SSOP20


Specifications

PARAMETERS SYMBOL CONDITIONS RATINGS UNIT NOTE
VDD Power Supply VDD   -0.3 to +6 V  
VDDL Power Supply VDDL   -0.3 to VDD V  
Input Voltage VIN1 CX/TCLK, REF,
FB, SENS terminals		 -0.3 to VDD+0.3 V  
Input Voltage VIN2 REQ, DATA, SCK, RSTb
Terminals		 -0.3 to VDD+0.3 V  
Switch Voltage VSW SW terminal +18.0 V 3
Power Dissipation PD   640 (QFN20)
540 (SSOP20)		 mW 4
5
Operating Temperature Topr   -40 to +85  
Storage Temperature Tstg   -55 to +125  



Description

The NJU6051 is a white LED driver with an automatic dimming control. It contains an output driver, a PWM controller, a luminance sensor control (power supply for sensor & A/D converter), a step-up DC/DC converter, a serial interface, etc.

The output driver  NJU6051 ensures a 30mA maximum capability which allows the connection of 8 white LEDs (4 series x 2 parallels). Depending on the ambient light sensed with an external luminance sensor, the PWM controller controls PWM duty in 8 steps preselected out of 64 steps. In addition, the frequency of the DC/DC converter is high so that NJU6051 permits the use of small, low-profile inductors and capacitors to minimize the footprint in space-conscious applications.

All of these benefits make the NJU6051 suitable for the battery-powered portable applications such as a cellular phone, a camcorder, PDA, etc.




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