DC637A

DC637A demonstration circuit features the LT®3465 and LT®3465A constant-current white LED drivers in small SOT23 ThinSOT packages. The demo board is designed to demonstrate high efficiency and small size performance of the LT3465 and LT3465A, made possible by a 200mV feedback voltage, 1.2MHz (2.4MHz for LT3465A) switching frequency, and a special internal compensation network allowing 0603 input/output capacitors (the output capacitor at 0.22uF). The DC637A is specifically designed for white LED backlight applications using 2~4 LEDs, making the LT3465 an ideal solution for battery powered portable applications such as cellular phone, digital camera, MP3 player, GPS receiver, and handheld computer (PDAs). LT3465 offers numerous LED dimming circuit options.

• 13V output voltage at VIN = 2.7V to 5V
• 30mV typical output ripple at typical output ripple
• 80% at typical efficiency at VIN = 3.6V, ILED = 15mA