LCD Bias Outputs (+5V/25mA, +15V/100µA, -10V/100µA) Output Sequencing No External Diodes Required POS, NEG, and MAIN Are Autodischarged During Shutdown LED Backlight Step-Up DC-DC Converter Series Connection for Uniform Illumination Supports Up to 8 LEDs at 25mA (max) 900mW (max) Power Overvoltage Protection Low Input/Output Ripple Soft-Start Fast 1MHz PWM Operation for Small Component Size Temperature Derating Function (MAX1579) High Efficiency Bias: 83% (5.0V at 25mA, 15V/-10V at 100µA) LED: 84% (6 LEDs at 20mA) Independent Enable Inputs for LED and Bias Power Thermal-Shutdown Protection 1µA Shutdown Current Tiny 4mm x 4mm Thin QFN Package Fully Assembled and Tested
- Internet Appliances
- LCD Displays with White LED Backlight
- PDAs, Palmtops
The MAX1579 evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX1578/ MAX1579. This MAX1579 EV kit drives six white LEDs in series for backlighting and includes complete bias supplies for small TFT displays. The internal charge pumps for the TFT bias supplies provide fixed +15V at 100µA for VON, -10V at 100µA for VOFF, and +5V at 25mA for the source driver. The MAX1579 EV kit can also evaluate the MAX1578. To evaluate the MAX1578, order a free sample along with this EV kit.