IC drives up to six LED strings at 93.5% efficiency

March 30, 2016 // By Julien Happich
The ARC1C0608 IC is a LED driver that is so efficient that it is able to save 0.5W (in a typical 2W host platform) when deployed in backlights for tablets and other smart mobile devices, according to manufacturer Arctic Sand Technologies.

Arctic Sand IC’s feature TIPS (Transformative Integrated Power Solution) a patented ‘staged pipeline’ architecture that effectively reduces dependence on inductance, inherently lowers EMI and ripple. The ARC1C0608 LED driver has six integrated programmable current sinks, integrates all MOSFETs, its control and driver circuitry, and features state of the art dimming options within a tiny WLCSP-35 package. The TIPS boost architecture delivers LED efficiency levels of 93.5% peak for up to six LED strings at 3.8V input voltage.

The chip runs off a single cell Li-Ion battery input voltage of 2.7V - 5.5V and delivers up to 30V output for maximum flexibility in the assignment of LEDs to strings and selection of LED forward voltage. The IC includes extensive fault protection including over-current, output over-voltage and under-voltage protection, LED open and short protection (eliminating the need for an external disconnect switch). An I²C 6.0-compatible serial interface operating at up to 1MHz is included.

The IC facilitates linear, PWM, or hybrid PWM dimming with either linear or logarithmic function, and phase-shifted PWM dimming can be employed among active strings to eliminate audible noise.

Visit Arctic Sand Technologies at www.arcticsand.com