Power Electronics

Power Management ICs

Extending efforts to support every power requirement for next-generation portable color displays, Texas Instruments Inc. recently announced its first organic light emitting diode (OLED) display power conversion integrated circuit (IC) and a new white LED charge pump for backlight applications.

"The market for OLED displays is expected to top $1 billion by 2006, with rapid growth driven by a shift from monochrome to color," said Kimberly Allen, industry analyst from iSuppli. "These high-value displays offer the potential for manufacturers to produce thinner, lighter and more power-efficient digital cameras and other portable electronics, and TI is stepping in at a key moment to support customers ready to go to market with OLED technology."

TI's TPS65130 is a dual-output, dc-dc converter optimized to generate a positive output voltage up to 15 V and a negative output voltage down to -12 V with programmable sequencing. With a power conversion efficiency up to 89%, the new driver supports advanced OLED and charge-coupled device (CCD) sensor bias supply applications in battery-powered equipment, such as cellular phones, PDAs, digital cameras and camcorders. The TPS65130 supports an input voltage range of 2.7 V to 5.5 V, which allows it to be powered directly from a single-cell lithium-ion (Li-Ion) battery or multi-cell nickel-metal hydride (NiMH), nickel-cadmium (NiCd) and alkaline batteries.

Meeting designer's need for board space reduction, the TPS65130 features a small 4-mm × 4-mm QFN package and a minimum number of external components. The TPS65130 operates at a low quiescent current and with a fixed frequency pulse width modulation (PWM) of minimum 1.25 MHz, which allows the use of tiny 4.7-µH inductors. Independent enable pins allow power-up and power-down sequencing for both outputs. Furthermore, load-disconnect during shutdown conserves battery life.

For more information, visit www.ti.com.

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