TI Offers New Charge Pumps and Switch-Mode IC
Texas Instruments Inc. (TI, Dallas, TX) announced two new triple-output charge pumps for low-temperature poly silicon (LTPS) liquid crystal displays (LCDs) in hand-held, battery-powered applications, and an inductive dc/dc power supply for thin-film transistor (TFT) LCDs in notebooks and LCD monitors. The new power management integrated circuits (ICs) will help deliver innovative small- and large-form-factor LCD applications with improved power efficiency and increased board savings.
The integrated TPS65110 and TPS65111 triple-output power supply charge pumps efficiently manage the three bias voltages required in most LTPS LCD displays used by PDAs, smart phones and digital cameras. In addition to high efficiency, the 4mm x 4mm devices come in QFN packages and provide low 5mV ripple at 5mA (typical). The TPS65110 and TPS65111 feature internally set power-up and power–down sequencing and require only small ceramic capacitors for operation.
The new TPS65100 power supply IC manages all voltages required by TFT LCD displays in notebooks and LCD monitors. The TPS65100 uses a fixed-frequency boost converter at 1.5MHz to supply the main source drive for the LCD display. An integrated adjustable charge pump provides the positive LCD gate drive voltage, and an external adjustable negative charge pump provides the negative gate drive voltage. For LCD panels powered with 5V, the TPS65100 provides an auxiliary linear regulator controller to provide a regulated 3.3V for logic circuitry.
The TPS65110, TPS65111 and TPS65100 LCD drivers are available now. The TPS65110 comes in a 4mm x 4mm QFN package and the TPS65100 comes in a 24-pin TSSOP or 4mm x 4mm QFN package. Suggested resale pricing in 1,000-piece quantities is $1.69 each for the TPS65110 and TPS65111, and $2.69 for the TPS65100.
