Texas Instruments introduced today an organic light emitting diode (OLED) power driver designed to enhance image quality for small form factor displays up to 2.5 inches. The TPS65136 power integrated circuit supports active matrix OLED (AMOLED) displays used in mobile phones, digital cameras and portable media players.
With just one 2.2-uH inductor to generate both outputs on the single- inductor, multiple-output converter technology, the TPS65136 provides high picture quality and achieves a smaller solution size with a reduced component count. A buck-boost topology allows the device to generate a positive voltage up to 4.6 V and adjustable negative output voltag down to -7 V. In addition, the TPS65136 input voltage can be above or below the positive output voltage, allowing it to support new batteries with a starting voltage up to 4.8 V.
The unique converter technology results in excellent line and load regulation, which is required to avoid potential display disturbances in mobile devices during transmit periods. The converter also lowers the switching frequency as the load current decreases to maintain high efficiency over the entire load current range. The TPS65136 maintains the switching frequency above the audible range with a voltage-controlled oscillator to avoid causing audible noise from the vibration of the ceramic output capacitors.
The TPS65136 is offered in a 16-pin QFN package, and the suggested resale price is $1.20 in 1,000-unit quantities.
With just one 2.2-uH inductor to generate both outputs on the single- inductor, multiple-output converter technology, the TPS65136 provides high picture quality and achieves a smaller solution size with a reduced component count. A buck-boost topology allows the device to generate a positive voltage up to 4.6 V and adjustable negative output voltag down to -7 V. In addition, the TPS65136 input voltage can be above or below the positive output voltage, allowing it to support new batteries with a starting voltage up to 4.8 V.
The unique converter technology results in excellent line and load regulation, which is required to avoid potential display disturbances in mobile devices during transmit periods. The converter also lowers the switching frequency as the load current decreases to maintain high efficiency over the entire load current range. The TPS65136 maintains the switching frequency above the audible range with a voltage-controlled oscillator to avoid causing audible noise from the vibration of the ceramic output capacitors.
The TPS65136 is offered in a 16-pin QFN package, and the suggested resale price is $1.20 in 1,000-unit quantities.
Posted: May 19,2008 by Ron Mertens
