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LM3503ITLX-25 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM3503ITLX-25 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 20 page LM3503 Dual-Display Constant Current LED Driver with Analog Brightness Control General Description The LM3503 is a white LED driver for lighting applications. For dual display backlighting applications, the LM3503 pro- vides 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 protec- tion, and dynamic white LED current control capability, the LM3503 offers superior performance over other step-up white LED drivers. Features n Drives up to 4, 6, 8 or 10 White LEDs for Dual Display Backlighting n > 80% Peak Efficiency n Output Voltage Protection Options: 16V, 25V, 35V & 44V n Input Under-Voltage Protection n Internal Soft Start Eliminates Inrush Current n 1 MHz Constant Switching Frequency n Analog Brightness Control n Wide Input Voltage Range: 2.5V to 5.5V n Low Profile Packages: <1 mm Height — 10 Bump MicroSMD — 16 Pin LLP Applications n Dual Display Backlighting in Portable devices n Cellular Phones and PDAs Typical Application 20128662 August 2006 © 2006 National Semiconductor Corporation DS201286 www.national.com |
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