The TPS61176 is an integrated WLED backlight driver for tablets or notebook PCs using
single-cell batteries. It comprises a high-efficiency boost converter with an integrated 2-A, 40-V
power MOSFET, and six current sink regulators. The device can drive up to 60 WLEDs. The boost
output voltage automatically adjusts to the WLED forward voltage to improve efficiency.
The TPS61176 supports mixed dimming mode. The automatic switch between PWM dimming and
analog dimming increases the overall electrical-to-optical efficiency, reducing power of the
backlight significantly. The switch point can be programmed to 12.5% or 25%. PWM dimming mode can
also be programmed to fixed frequency dimming or direct PWM dimming. The device supports up to
14-bit dimming resolution to avoid potential flickering during low brightness dimming.
True shutdown is supported with a driver for an external isolation P-channel MOSFET.
When the device is disabled or the boost output is shorted to ground, the isolation PFET is turned
off to cut off the power path from battery preventing any leakage current from the battery. The
device also integrates soft start, thermal shutdown, WLED open and short protection. Its 16-pin
WQFN package provides a space-saving and high-performance WLED driver solution.
View datasheet View product folder