TFT-LCD power supply ICs now shipping

Mouser Electronics is now shipping Nexperia’s NEX1000xUB power supply ICs. These new, space-saving, programmable, high-efficiency, dual-output LCD bias power supplies are designed for space-constrained applications, extending battery life and video display lifetime for smartphones, tablets, virtual reality (VR) headsets and LCD modules.

The ICs combine an LDO regulator, integrated boost converter and negative charge pump with an integrated active output discharge function to deliver programmable power supply efficiency in a wafer-level chip scale package smaller than standard wafer level packages (1.16 by 1.96 by 0.62 by 0.4mm pitch). Features include I²C programmable asymmetric voltage outputs with programmable positive and negative output, from 80mA dual output LCD bias to 220mA output current.

The components are internally compensated, requiring only a single inductor for both outputs. To address low power considerations the ICs have an internal boost converter which can operate either in continuous conduction mode (CCM) or pulse frequency modulation mode (PFM) to provide the highest level of efficiency.