4 R1 VIN C7 22uF (OPT) 4.7uH C1 1uF 25V E3 C4 4.7uF R5 1.02M 1% 9 IADJ2 R4 0.3 1% 7 FBP 8 VREF 1 E9 SS 4 Q1 2N7002 1 3 R8 10K 21 GND D2 1N4148W 2 2 5 VC R2 0 RT 2 R3 C3 0.033uF LED3- LED2- LED1- E7 E6 E5 LT3003EMSE E11 8 OT2 CUSTOMER NOTICE 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. 3 VMAX Vmax 4 B VIN Vin 5 SHDN 7 OT1 9 OT2 E10 11 GND OT1 10 VEE B 4 C VOUT LED+ C2 22nF 6 PWM 5 GND 6.81K U2 A VOUT E4 ISN2 12 15 GND C E8 ISP2 11 3 SHDN LED2 2 E2 R6 45.3K 1% FBN 6 N/C 18 N/C 19 N/C 20 1 VIN 10 IADJ1 SHDN D DFLS140 LT3477EFE 1 VMAX 1 U1 R7 45.3K PWM D1 2 SUMIDA CDRH5D16-4R7 VIN SHDN L1 0 LED3 3 GND E1 ISP1 13 ISN1 14 VIN 8V-16V 2 SW 16 SW 17 D 3 LED1 1 5 C9 1uF 25V SHDN CONTRACT NO. APPROVALS DRAW N DATE HELEN 11/29/05 W alker Bai 11/29/05 CHECKED TECHNOLOGY DESIGNER W ednesday, October 25, 2006 2 A TITLE APPROVED ENGINEER 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SIZE LT3477EFE+LT3003EMSE, High Current Multi-String LED Driver with Wide PWM Dimming Range CAGE CODE SCALE: FILENAME: DWG NO REV A DC1130A SHEET 1 1 OF 1