1 2 3 VIN 3V-10V 7 8 A C2 1uF 16V L1 15uH SD3112-150 D2 D3 D4 D5 D6 7 LED2 D8 D9 D10 D11 D12 5 3 LED1 D7 3 1 U1 LT3497EDDB SW2 D1 SW1 9 E2 L2 15uH SD3112-150 8 + C1 47uF,16V (Opt.) GND 2 E3 VIN JP1 Output1 1 2 C5 0.1uF PWM2 R6 0 C4 1uF 35V 1 B E6 2 6 Exposed Pad Solder Side GND R3 100K 1% SHDN/DIMMING CONTROL1 CAP2 CTRL1 11 CAP1 Q2 (Opt.) R4 100K 1% C6 0.1uF SHDN/DIMMING CONTROL2 JP2 Output2 3 E4 2 2 E5 10 LED (White) CTRL2 C3 1uF 35V R2 10 4 1 R1 10 GND LED (White) R5 0 3 PWM1 B 6 VIN E1 Q1 (Opt.) 5 VIN A 4 3 VIN 1 ON OFF ON C OFF C LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY Customer Notice D 1 2 3 LINEAR TECHNOLOGY CORPORATION Linear Technology Has Made A Best Effort To Design A Circuit That Meets Customer-Supplied Specifications; However, It Remains The Customer's Responsibility To Verify Proper And Reliable Operation In The Actual Application. Component Substitution And Printed Circuit Board Layout May Significantly Affect Circuit Performance Or Reliability. Contact Linear Technology Applications Engineering For Assistance. This Circuit Is Proprietary To Linear Technology And Supplied For Use With Linear Technology Parts. 4 5 1630 McCARTHY BLVD. MILPITAS, CA. 95035 PHONE (408) 954-8400 FAX (408) 434-0507 Title D Dual White LED Driver Converter Size Document Number Date: Thursday, November 10, 2005 DC1019A 6 Rev LT3497EDDB 7 Sheet 1 of A 8 1