LM3503 - National Semiconductor

LM3503 Dual-Display Constant Current LED Driver

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-.

Features

n Drives up to 4, 6, 8 or 10 White LEDs for Dual Display Backlighting Typical Application 20128662 © 2005 National Semiconductor Corporation DS201286 www.national.com LM3503 Connection Diagrams 10-Bump Thin MicroSMD Package (TLP10) 16-Lead Thin Leadless Leadframe Package (SQA16A) 20128603 Top View 20128602 Top View www.national.com 2 LM3503 Pin Descriptions/Functions Bump # A1 B1 C1 D1 D2 D3 C3 B3 A3 A2 Pin # 9 7 6 4 2 and 3 15 and 16 14 13 12 10 1 5 8 11 DAP Name Cntrl Fb VOUT2 VOUT1 Sw Pgnd Agnd VIN En2 En1 NC NC NC NC DAP Feedback Voltage Connection Drain Connections of the NM.