New LCD bias power ICs deliver high performance in display devices

Nexperia has introduced a new series of space-saving, high-efficiency, dual-output LCD bias power supplies. These devices have been designed to extend the lifetime of TFT-LCD panels used in various applications, including smartphones, tablets, VR headsets, and LCD modules.

The NEX10000 is an 80mA dual output LCD bias power supply, while the NEX10001 can deliver up to 220 mA of output current. The devices feature I²C programmable asymmetric voltage outputs. The devices are internally compensated and require only a single inductor for both outputs, allowing for a small BoM and PCB area. To minimise the amount of board area needed in space-constrained applications, the NEX10000/1 are provided in a WLCSP with 15 bumps and a 1.16mm × 1.96mm × 0.62mm form factor, which is even smaller than standard wafer-level packages.

"We're excited to launch the LCD bias IC as the first product in the portfolio," said Irene Deng, general manager of the Power and Signal Conversion Business Group at Nexperia. "It is a great example of how Nexperia is working to meet the power and small size demands for the latest smartphones and other handheld electronic devices. The NEX10000/1 also features high accuracy output and high efficiency output to extend battery life and longer display life."

To address low power considerations in TFT-LCD applications requiring longer battery life, the NEX10000/1 have an internal boost converter which, depending on the load current, can operate either in CCM or PFM to provide the highest efficiency level. 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 2.7V to 5V and notably offer excellent line and load transient responses. These features reduce the amount of output ripple to provide more stable images, which can help extend an LCD display's operating lifetime.