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
The TPS61181A device provides a driver output for an external PFET connected between the
input and inductor. During short circuit or overcurrent conditions, the device turns off the
external PFET and disconnects the battery from the WLEDs. The PFET is also turned off during device
shutdown (thereby giving shutdown) to prevent any leakage
current from the battery. The device integrates overvoltage protection, soft-start and thermal
shutdown and has a built-in linear regulator for the device supply.
For all available packages, see the orderable addendum at the
end of the data sheet.
View datasheet View product folder