器件名称: AAT1231
功能描述: Step-Up DC/DC Converters for White LED Backlight Applications
文件大小: 1559.13KB 共27页
简 介:PRODUCT DATASHEET
AAT1231
SwitchRegTM Step-Up DC/DC Converters for White LED Backlight Applications
Features
Input Voltage Range: 2.7V to 5.5V Maximum Continuous Output 24V @ 50mA Drives 6 LEDs in Series, 12 LEDs in Parallel / Series Configuration Constant LED Current with 6% Accuracy Digital Control with S2Cwire Single Wire Interface 26 Discrete Steps No PWM Control Required No Additional Circuitry Up to 82% Efficiency Up to 2MHz Switching Frequency Allows Small External Chip Inductor and Capacitors Hysteretic Control No External Compensation Components Excellent Load Transient Response High Efficiency at Light Loads Integrated Soft Start with No External Capacitor True Load Disconnect Guarantees <1.0μA Shutdown Current Selectable Feedback Voltage Ranges for High Resolution Control of Load Current Short-Circuit, Over-Voltage, and Over-Temperature Protection 12-Pin TSOPJW Package -40°C to +85°C Temperature Range
General Description
The AAT1231/1231-1 are high frequency, high efficiency constant current boost converters capable of 24V maximum output voltage. Both devices are ideal power solutions for backlight applications with up to six white LEDs in series or up to twelve white LEDs in a parallel/series configuration. The input voltage is 2.7V to 5.5V for singlecell lithium-ion/polymer (Li-ion) based portable devices. The LED current is digitally controlled across a 6x operating range using AnalogicTech’s Simple Serial Control (S2Cwire) interface. Progr……
