Powering LCDs

has developed a power management IC that supports all four voltage requirements in a thin film transistor (TFT) liquid crystal display (LCD) panel.

TI's single-chip TPS65160 incorporates two high-efficiency DC/DC converters, two charge pumps, a range of safety features and adjustable power-on sequencing functionality.

Supporting input voltages from 8 V to 14 V, the integrated device includes a 2.6A switch-mode boost converter to provide the source voltage for the system, a 1.8A non-synchronous step-down converter to provide the logic voltage, and positive and negative charge pump drivers with adjustable regulated output voltages to ensure optimal picture quality.

The TPS65160 provides fast transient response and maintains up to 95% power conversion efficiency to help save energy usage.

The chip also includes safety features such as over-voltage protection of the boost converter; short-circuit protection of the buck converter; and thermal shutdown to prevent damage caused by excessive heat and power dissipation. Additionally, an under-voltage lockout function shuts down the device at voltages lower than 6V to provide added protection.

The power converter comes in a 28-pin TSSOP package. Suggested resale pricing in quantities of 1,000 is $2.60. Evaluation modules, application notes and TI’s power management selection tool are available.