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LM3503 Datasheet PDF - Texas Instruments

Part NameDescriptionManufacturer
LM3503 Dual-Display Constant Current LED Driver with Analog Brightness Control Texas-Instruments
Texas Instruments Texas-Instruments
LM3503 Datasheet PDF : LM3503 pdf   
LM3503 image

DESCRIPTION
The LM3503 is a white LED driver for lighting applications. For dual display backlighting applications, the LM3503 provides a complete solution. The LM3503 contains two internal white LED current bypass FET (Field Effect Transistor) switches. The white LED current can be adjusted with a DC voltage from a digital to analog converter or RC filtered PWM (pulse-width-modulated) signal at the Cntrl pin.
With no external compensation, cycle-by-cycle current limit, output over-voltage protection, input under-voltage protection, and dynamic white LED current control capability, the LM3503 offers superior performance over other step-up white LED drivers.

FEATURES
• Drives up to 4, 6, 8 or 10 White LEDs for Dual
   Display Backlighting
• >80% Peak Efficiency
• Output Voltage Protection Options: 16V, 25V,
   35V & 44V
• Input Under-Voltage Protection
• Internal Soft Start Eliminates Inrush Current
• 1 MHz Constant Switching Frequency
• Analog Brightness Control
• Wide Input Voltage Range: 2.5V to 5.5V
• Low Profile Packages: <1 mm Height
   – 10 Bump DSBGA
   – 16 Pin WQFN

APPLICATIONS
• Dual Display Backlighting in Portable devices
• Cellular Phones and PDAs

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