TPS61185,pdf(WLED Driver for N

The TPS61185 IC provides highly integrated soluTIons for large-size LCD backlighTIng. This device has a built-in high efficiency boost regulator with integrated 2 A/40 V power MOSFET. The eight current sink regulators provide high precision current regulaTIon and matching. In total, the device can support up to 80 LEDs. In addiTIon, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The TPS61185 supports the PWM method for brightness dimming. Simply tie the unused current sinks to ground if fewer than eight are needed. During PWM dimming, each of the eight current regulators is turned on/off at the duty cycle determined by an external pulse width modulation (PWM) signal input to the PWM pin.