Opto-Electronics


OLED driver for small displays

11 June 2008 Opto-Electronics

Texas Instruments has introduced 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 IC supports active matrix OLED (AMOLED) displays used in mobile phones, digital cameras and portable media players.

AMOLED displays allow each pixel to emit its own light, resulting in high colour saturation, thin form factor, high contrast ratio, fast response time and low power consumption. The TPS65136 manages power to AMOLED displays by providing positive and negative voltages, and supplying less current and lower voltages than passive matrix displays.

With just one 2,2 μH inductor to generate both outputs on the single-inductor, multiple-output converter technology, the device provides high picture quality and achieves a small solution size with a low component count. A buck-boost topology allows the device to generate a positive voltage up to 4,6 V and adjustable negative output voltage down to -7 V. In addition, the 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.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Smallest automotive maXTouch controllers
29 July 2020, Altron Arrow, Avnet South Africa , DSP, Micros & Memory
To help enhance and ease today’s driving experience, automotive manufacturers are implementing additional touch displays beyond the centre infotainment display (CID). Supporting the application of these ...

Read more...
MOSFET half-bridge power stage
30 June 2020, Altron Arrow , Power Electronics / Power Management
Vishay Intertechnology introduced a new 30 V n-channel MOSFET half-bridge power stage that combines a high-side TrenchFET MOSFET and low-side SkyFET MOSFET with integrated Schottky diode in one compact ...

Read more...
Cypress ships one billionth USB-C device
30 June 2020, Altron Arrow , News
Cypress, an Infineon Technologies company, announced that in less than five years, the company has achieved a landmark milestone by shipping its one billionth USB-C device. As the leading provider of ...

Read more...
18 V synchronous buck converters
30 June 2020, Altron Arrow , Power Electronics / Power Management
Suitable for consumer and industrial applications, Diodes Incorporated announced the AP62xxx family of high-efficiency synchronous step-down DC-DC converters including the AP62250 (2,5 A), AP62300 (3 A), ...

Read more...
MOSFET half-bridge power stage
30 June 2020, Altron Arrow , Power Electronics / Power Management
Vishay Intertechnology introduced a new 30 V n-channel MOSFET half-bridge power stage that combines a high-side TrenchFET MOSFET and low-side SkyFET MOSFET with integrated Schottky diode in one compact ...

Read more...
Video Reel: Microchip’s SAM L11
30 June 2020, Altron Arrow , Multimedia, Videos
This video (www.dataweek.co.za/*jun20-sam) provides a brief overview of Microchip Technology’s SAM L11 comprehensive security solution framework and demos to make implementation of security simple. Microchip’s ...

Read more...
Dual-core wireless MCU
30 June 2020, Altron Arrow , Telecoms, Datacoms, Wireless, IoT
The STM32WBx0 is a dual-core wireless MCU based on an Arm Cortex-M4 core running at 64 MHz (application processor) and an Arm Cortex-M0+ core at 32 MHz (network processor). The STM32WBx0 Value Line ...

Read more...
What’s in your healthcare monitor?
29 July 2020, Altron Arrow , Power Electronics / Power Management
System designers of portable and wireless medical monitoring devices used for in-home patient health monitoring purposes face daunting design challenges such as thermally- and space-constrained enclosures, as well as being able to transmit data without interference or interruption.

Read more...
A social distancing solution for workplaces
29 July 2020, Altron Arrow , Telecoms, Datacoms, Wireless, IoT
As South Africa gradually eases lockdown to resuscitate the economy after a hard lockdown that lasted for more than 10 weeks, there is a need to facilitate people returning to work safely. Apart from ...

Read more...
Low-voltage automotive buck converter
29 July 2020, Altron Arrow , Power Electronics / Power Management
Diodes Incorporated announced the AP61100Q, a 5,5 V, 1 A continuous output current, automotive-compliant, synchronous buck converter for point of load (POL) applications. With a fully integrated 110 mΩ ...

Read more...