Power supply ICs suit TFT-LCD applications

16-02-2024 | Mouser Electronics | Semiconductors

Mouser now offers NEX1000xUB power supply ICs from Nexperia. These new, space-saving, programmable, high-efficiency, dual-output LCD bias power supplies are created for space-constrained applications, extending battery life and video display lifetime for smartphones, tablets, VR headsets, and LCD modules.

The power supply ICs combine an LDO regulator, an integrated boost converter, and a negative charge pump with an integrated active output discharge function to supply programmable power supply efficiency in a wafer-level chip scale package (WLCSP), smaller than standard wafer level packages (1.16mm × 1.96mm × 0.62mm, 0.4mm pitch). The ICs feature I²C programmable asymmetric voltage outputs with programmable positive and negative output, from 80mA dual output LCD bias (NEX10000UB) to 220mA (NEX10001UB) output current.

The ICs are internally compensated, needing only a single inductor for both outputs. To address low power considerations in TFT-LCD applications that need longer battery life, the ICs have an internal boost converter that, depending on the load current, can operate in CCM or PFM to provide the highest efficiency level. This feature decreases device current consumption, which helps to extend the life of single-cell Li-ion, Ni-Li and Li-polymer batteries from which they can operate. Both devices have an input voltage range of 2.7V to 5V, notably providing excellent line and load transient responses. These features decrease the amount of output ripple to provide more stable images, which can help extend the operating lifetime of an LCD display.

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By Seb Springall