TPS61181A

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS61181A SLVSAN6B – FEBRUARY 2011 – REVISED SEPTEMBER 2016 TPS61181A White-LED Driver For Notebook Display 1 Features 1 4.5-V to 24-V Input Voltage 38-V Maximum Output Voltage Integrated 1.5-A/40-V MOSFET 1-MHz Switching Frequency Adaptive Boost Output to WLED Voltages Small External Components Integrated Loop Compensation Six Current Sinks of 30 mA Up to 10 WLED in Series 1% Typical Current Matching and Accuracy Up to 1000:1 PWM Brightness Dimming Minimized Output Ripple Under PWM Dimming Driver for Input/Output Isolation PFET True Shutdown Overvoltage Protection WLED Open and Short Protection Built-in Soft Start 2 Applications Notebook LCD Display Backlight UMPC LCD Display Backlight Backlight for Media Form Factor LCD Display 3 Description The TPS61181A device provides highly integrated solutions for media-size LCD backlighting. The six current sink regulators provide high-precision current regulation and matching. In total, the device can support up to 60 WLEDs. The devices support pulse width modulation (PWM) brightness dimming. During dimming, the WLED current is turned on/off at the duty cycle and frequency, determined by the PWM signal input to the DCRTL pin. The TPS61181A device is designed to minimize the output AC ripple across a wide dimming duty cycle and frequency range and also reduces the audible noise from the output ceramic capa...