TPS61177A

Product Folder Order Now Technical Documents Tools & Software Support & Community TPS61177A SNVSA76B – MARCH 2015 – REVISED MARCH 2017 TPS61177A WLED Driver for Notebooks With PWM Interface and Mixed Dimming Mode 1 Features 1 2.5-V to 24-V Input Voltage Range 39-V Maximum Output Voltage Integrated 1.8-A, 40-V MOSFET 450-kHz to 1.2-MHz Programmable Switching Frequency Adaptive Boost Output to WLED Voltages 100-Hz to 25-kHz Wide Input PWM Dimming Frequency Range 1% Minimum Dimming Duty Cycle Small External Components Integrated Loop Compensation Six Current Sinks of 30 mA Maximum 1% (Typical) Current Matching Input PWM Glitch Filter PWM Brightness Interface Control Three Optional Dimming Methods, including Direct PWM Dimming, Analog Dimming, and Analog and PWM Mixed Dimming Built-in WLED Open Protection Thermal Shutdown 2 Applications Notebook and Tablet LCD Display Backlights Patient Monitors Medical Displays HMI Test and Measurement Equipment 3 Description The TPS61177A device provides a highly integrated white LED (WLED) driver solution for notebook LCD backlight. This device has a built-in high-efficiency boost regulator with integrated 1.8-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 72 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency. The TPS61177A su...