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SNVSA76B – MARCH 2015 – REVISED MARCH 2017 TPS61177A WLED Driver for Notebooks With PWM Interface and Mixed Dimming Mode
1 Features 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. 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 …
