描述 Description

\tThe AAT1507 is a boost DC-DC converter for white LEDs. Series connection of the LEDs allows consistent currents essential for uniform brightness, and also eliminates the need for ballast resistors. The 28V over voltage comparator can also be used to prevent output open-circuit, caused by bond wire breakages.


\tThe AAT1507 switches at 1.3MHz. Optional external components may be added if required. The optimized input/output capacitor and a low feedback voltage to minimize power loss in current setting resistor makes AAT1507 a power-smart solution.


\tThe AAT1507 is available in a space-saving TSOT23-6 (TSOT26), and SOT23-6 (SOT26) packages, which are ideal for portable applications.

特性 Features

? Boost PWM with Internal NMOS
? Wide PWM Dimming Range: 100Hz to 200kHz
? 2.7V to 5.5V Input Voltage Range
? Under-Voltage Lockout (UVLO) Protection
? Internal Over Voltage and Thermal Protection
? Internal Soft-Start
? Fixed Switching Frequency: 1.3MHz
? 0.1μA Shutdown Current
? Small TSOT-23-6 and SOT-23-6 Package

應(yīng)用 Application

? Cell PhonesDSCSmall LCD Displays