New LCD Bias Power ICs Extend Battery Life and Video Display Lifetime in Smartphones and VR Headsets

Published  January 12, 2024   0
L Lakshita
LCD Bias Power ICs

Nexperia has introduced a new series of space-saving, high-efficiency, dual-output LCD bias power supplies that are designed to extend the lifetime of thin film transistor liquid crystal display (TFT-LCD) panels used in various applications including smartphones, tablets, virtual reality (VR) headsets, and LCD modules. The new NEX10000 is an 80 mA dual output LCD bias power supply while the NEX10001 can deliver up to 220 mA of output current.

Both these devices feature I²C programmable asymmetric voltage outputs. These devices are internally compensated and require only a single inductor for both outputs allowing for a small bill-of-material and PCB area. To minimize the amount of board area required in space-constrained applications, the NEX10000/1 are provided in a wafer level chip scale package (WLCSP) with 15 bumps and a 1.16 × 1.96 × 0.62 mm form factor, which is even smaller than standard wafer level packages.

To address low power considerations in TFT-LCD applications that require longer battery life, the NEX10000/1 have an internal boost converter which, depending on the load current, can operate either in continuous conduction mode (CCM) or pulse frequency modulation mode (PFM) to provide the highest level of efficiency. This reduces 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 2.7 V to 5 V and notably offer excellent line and load transient responses.