LM3410

LM3410 PowerWise® 525kHz/1.6MHz, Constant Current Boost and SEPIC LED Driver with Internal Compensation January 23, 2008 LM3410 PowerWise® 525kHz/1.6MHz, Constant Current Boost and SEPIC LED Driver with Internal Compensation General Description The LM3410 constant current LED driver is a monolithic, high frequency, PWM DC/DC converter in 5-pin SOT23, 6-pin LLP, & 8-pin eMSOP packages. With a minimum of external components the LM3410 is easy to use. It can drive 2.8A typical peak currents with an internal 170 mΩ NMOS switch. Switching frequency is internally set to either 525 kHz or 1.60 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficiencies up to 88% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 80 nA. The LM3410 utilizes current-mode control and internal compensation to provide high-performance over a wide range of operating conditions. Additional features include dimming, cycle-by-cycle current limit, and thermal shutdown. Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Space Saving SOT23-5 & 6-LLP Package Input voltage range of 2.7V to 5.5V Output voltage range of 3V to 24V 2.8A Typical Switch Current High Switching Frequency — 525 KHz (LM3410-Y) — 1.6 MHz (LM3410-X) 170 mΩ NMOS Switch 190 mV Internal Voltage Reference Internal Soft-Start Current-Mode, PWM Operation Thermal Shutdown Applications ■ ■ ■ ■ LED Backlight Current Source LiIon Backlight OLED ...