tft lcd power supply ic supplier

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ROHM was established in Kyoto in 1958 as initially a manufacturer of small electronic components. In 1967 production was expanded to include transistors and diodes, and in 1969 ICs and other semiconductor products were added to the lineup. Two years later (in 1971), going against conventional Japanese business culture, the company entered the US market by establishing a sales office and IC design center in Silicon Valley. Through the hard work and passionate dedication of its young work force, business flourished, causing the industry to take notice. ROHM"s expansion overseas soon became a template for other companies and eventually was accepted as common business practice.

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Distributor of component LCDs for equipment which provide high-contrast ratio, color saturation, luminance and performance enhancements such as advanced wide viewing (AWV) for true color fidelity, super-high brightness (SHB) and wide temperature range. Focus on industrial, instrumentation, hand-helds, medical and other low-to-medium volume markets. High-bright LED backlights for outdoor use. LVDS interfaces decrease EMI. Factory installed touch screen solutions. 3.5" to 12.1" QVGA, HVGA, VGA, WVGA, SVGA, XGA, WXGA. Also distributes other related products including LED drivers, lamps, indicators, LED assemblies, segment displays, LED mounts, LEDs, and light pipes. Distributor of electronic components, hardware and fasteners and provides design/value engineering support, fulfillment strategies, procurement services and transactional models to meet specific needs and priorities.

The XC9516 series can offer three different power supplies to TFT-LCD panels. These power supplies consist of a step-up DC/DC converter for a source driver, positive and negative charge pumps for a gate driver.

This IC has power-on sequences to keep inrush current as small when output voltage rises. The step-up DC/DC output can be used as power-on sequences with adding a P-channel FET as external component. Also, the FET can shut down a path to the power input line when CE pin is low.

An IC for which any output voltage can be set by the reference voltage of the FB pins and the external dividing resistor. The output voltage is determined by the RFB1 and RFB2 values, using the following formula: VOUT = Vref × (RFB1 + RFB2)/RFB2

This circuit forcibly turns off the driver transistor when VIN drops below the UVLO voltage. If the input voltage recovers to the value which is equal to the specified value or more, UVLO will be released to resume the switching operation. It is resumed by the soft-start function. The paused state by UVLO is not the shutdown. The pulse output is stopped, but the internal circuit is operating.

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