tft lcd power supply ic manufacturer

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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.

BD83854GWL is a step-up switching regulator and charge pump inverter for small TFT-LCD Displays. It has a wide input voltage range of 2.5V to 4.5V that is suitable for portable applications. In addition, its small package design is ideal for miniaturizing the power supply.

The is an integrated power management IC (PMIC) for TFT-LCDs used in central display, rear seat entertainment and virtual dashboards. The device integrates a boost converter for generating AVDD, an LDO regulator for VLOGIC. VON and VOFF are generated by a charge pump driven by the switch node of the boost converter. The ISL78419 also includes a VON slice circuit, reset function, and a high performance VCOM amplifier with a Digitally Controlled Potentiometer (DCP) that is used as a VCOM calibrator. The AVDD boost converter features a 1.5A/0.18 boost FET with 600kHz/1200kHz switching frequency. The integrated logic LDO includes a 350mA FET for driving the low voltage needed by external digital circuitry. The gate pulse modulator can control the gate voltage to 30V, and both the rate and slew delay times are selectable. The supply monitor generates a reset signal when the system is powered down based on a user selected threshold level (programming resistor). The ISL78419 provides a digitally controlled VCOM output using I2C interface. One VCOM amplifier is also integrated in the chip to provide a fast slewing 150mA drive (sourcing or sinking). The output of the VCOM is powered up with the voltage stored at the last programmed 8-bit (internal) EEPROM setting. The ISL78419 is rated to operate over the temperature range to +105�C) and is qualified according to AEC - Q100.

to 5.5V input 1.5A, 0.18 integrated boost FET VON/VOFF supplies generated by charge pumps driven by the boost switch node LDO for VLOGIC channel 600kHz/1200kHz selectable switching frequency Integrated gate pulse modulator Reset signal generated by supply monitor Integrated VCOM amplifier DCP - I2C serial interface, address: 0101000, MSB left - Wiper position stored in 8-bit nonvolatile memory and recalled on power-up - Endurance, 1,000 data changes per bit UVLO, UVP, OVP, OCP, and OTP protection Pb-free (RoHS compliant) Ld 4x5 QFN AEC - Q100 qualified

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-468-3774 | Copyright Intersil Americas Inc. 2012. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners.

PIN# SYMBOL FB PGND CE RE VGH VGHM VFLK VDPM GPM_LO AVDD SCL DESCRIPTION AVDD boost converter feedback. Connect to the center of a voltage divider between AVDD and GND to set the AVDD voltage. Power ground Gate Pulse Modulator Delay Control. Connect a capacitor between this pin and GND to set the delay time. Gate Pulse Modulator Slew Control. Connect a resistor between this pin and GND to set the falling slew rate. Gate Pulse Modulator High Voltage Input. Place a 0.1�F decoupling capacitor close to the VGH pin. Gate Pulse Modulator Output for gate driver IC Gate Pulse Modulator Control input from TCON Gate Pulse Modulator Enable. Connect a capacitor from VDPM to GND to set the delay time before GPM is enabled. A current source charges the capacitor on VDPM. Gate Pulse Modulator Low Voltage Input; place a 0.47�F decoupling capacitor close to the GPM_LO pin. DCP and VCOM amplifier high voltage analog supply; place a 0.47�F decoupling capacitor close to the AVDD pin. I2C compatible clock input

PIN# SYMBOL SDA POS RSET VOUT NEG VDIV ADJ RESET L_OUT CD2 L_IN SS COMP FREQ VIN EN I2C compatible serial bidirectional data line VCOM Amplifier Non-inverting input DCP sink current adjustment pin; connect a resistor between this pin and GND to set the resolution of the DCP output voltage. VCOM Amplifier output VCOM Amplifier inverting input Voltage detector threshold. Connect to the center of a resistive divider between VIN and GND. VLOGIC LDO feedback. Connect to the center of a resistive divider between L_OUT and GND to set VLogic voltage for TCON. Voltage detector reset output LDO output. Connect at least one 1�F capacitor to GND for stable operation. Voltage detector rising edge delay. Connect a capacitor between this pin and GND to set the rising edge delay. LDO input. Connect a 1�F decoupling capacitor close to this pin. Boost Converter Soft-Start. Connect a capacitor between this pin and GND to set the soft-start time. Boost converter compensation pin. Connect a series resistor and capacitor between this pin and GND to optimize transient response and stability. Boost Converter frequency select; pull it to logic high to operate boost at 1.2MHz. Connect this pin to GND to operate boost 600kHz. IC input supply. Connect a 0.1�F decoupling capacitor close to this pin. AVDD boost converter switching node AVDD enable pin (Continued) DESCRIPTION

PART NUMBER (Notes 3) ISL78419ARZ NOTES: 1. Add "-T*" suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL78419 For more information on MSL please see techbrief TB363. PART MARKING 78419 ARZ VIN RANGE (V) to 5.5 TEMP RANGE (�C) to +105 PACKAGE (Pb-free) Ld 4x5 QFN PKG. DWG. # L28.4x5A

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.

TFT LCD display is characterized by good brightness, high contrast, strong sense of layering, and bright colors, but it also has the disadvantages ofrelatively highpowerconsumptionand high cost. TFT LCD technology has accelerated the development ofmobile phone color screens. Many of the new-generation color screen mobile phones support 65536-color displays, and some even support 160,000-color displays. At this time, the advantages of TFT high contrast and rich colors are very important.

TFT technology was developed in the 1990s. It adopts new materials and new processes for large-scale semiconductor full integrated circuit manufacturing technology. It is aliquidcrystal(LC), inorganic and organic thin film electroluminescence (EL and OEL) flat panel display. basis. TFTs are formed on glass or plastic substrates and other non-single wafers (of course, they can also be on wafers) by sputtering and chemical deposition processes to form various films necessary for manufacturing circuits, and large-scale semiconductor integrated circuits (LSIC) are produced by processing the films . The use of non-single-crystal substrates can greatly reduce costs, which is the extension of traditional large-scale integrated circuits to large areas, multi-functions, and low costs.Manufacturing TFTs thatcontrolthe switching performance of pixels (LC or OLED) on large-area glass or plastic substrates is more difficult than manufacturing large-scale ICs on silicon wafers. The requirements for the production environment (purification degree is 100), the requirements for the purity of raw materials (the purity of electronic special gas is 99.999985%), the requirements for production equipment and production technology exceed the large-scale integration of semiconductors, and are the top of modern large-scale production technology. Its main features are:

(1) Large area: The first generation of large-area glass substrate (300mm×400mm) TFT-LCD production line was put into operation in the early 1990s. By the first half of 2000, the area ofthe glass substrate had been expanded to 680mm×880mm), and 950mm×1200mm The glass substrate will also be put into operation. In principle, there is no area limit.

(2) High integration: The resolution of the 1.3-inch TFT chip used for liquid crystal projection is XGA containing millions of pixels. The 16.1-inch TFT array amorphous silicon with a resolution of SXGA (1280×1024) has a film thickness of only 50 nm, and TABONGLASS and SYSTEMONGLASS technologies. The IC integration, the requirements for equipment and supply technology, and the technical difficulty are more than traditional LSI.

(3) Powerful function: TFT was thefirst matrix addressingcircuitto improve the light valve characteristics of liquid crystal. For high-resolution displays, through the voltage adjustment in the range of 0-6V (its typical value is 0.2 to 4V), the precise control of the object element is realized, thereby making it possible for the LCD to achieve high-quality high-resolution display. TFT-LCD is the first flat panel display in human history that exceeds CRT in display quality. And people began to integrate the driver IC on the glass substrate, the function of the entire TFT will be more powerful, which is unmatched bytraditional large-scalesemiconductorintegrated circuits.

(4) Low cost: Glass substrates and plastic substrates have fundamentally solved the cost problem of large-scale semiconductor integrated circuits, and opened up a broad application space for the application of large-scale semiconductor integrated circuits.

(5)Flexibleprocess: In addition to sputtering, CVD (Chemical Vapor Deposition), MCVD (Molecular Chemical Vapor Deposition) and other traditional processes for film formation, laser annealing technology has also begun to be applied. It can produce both amorphous and polycrystalline films. A single crystal film can be manufactured. Not only can silicon films be made, but other II-VI and III-V semiconductor thin films can also be made.

(6) Wide application fields, LCD flat panel displays based on TFT technology are the pillar industries of the information society, and the technology can also be applied to the rapidly growing thin film transistor organic electroluminescence (TFT-OLED) flat panel displays. Growing up.

With the maturity of TFT technology in the early 1990s, color liquid crystal flat panel displays have developed rapidly. In less than 10 years, TFT-LCD has rapidly grown into a mainstream display, which is inseparable from its advantages. The main features are:

(1) Good use characteristics: low-voltage application, low driving voltage, solidified use safety and reliability improvement; flat, light and thin, saving a lot of raw materials and use space; low power consumption, its power consumption is about CRT display One tenth, reflective TFT-LCD is only about 1% of CRT, which saves a lot of energy; TFT-LCD products also have specifications, sizes, series, variety, convenient and flexible use, maintenance, update , Easy upgrade, long service life and many other features. The display range covers the application range of all displays ranging from 1 inch to 40 inches and the large plane of projection. It is afull-size displayterminal; the display quality ranges from the simplest monochrome character graphics to high resolution, high color fidelity, High-brightness, high-contrast and high-response video monitors of various specifications and models; display methods include direct-view type, projection type, perspective type, and reflective type.

(2) Good environmental protection characteristics: no radiation, no flicker, no damage to the user"s health. In particular, the emergence of TFT-LCD electronic books and periodicals will bring human beings into the era of paperless office and paperlessprinting, triggering a revolution in the way humans learn, spread, and document civilization.

(3) Wide application range, can be used normally within the temperature range from -20℃to +50℃, and the low-temperature working temperature of the TFT-LCD after temperature strengthening treatment can reach minus 80℃. It can be used as a mobile terminal display, desktop terminal display, and can also be used as a large-screen projection TV. It is a full-size video display terminal with excellent performance.

(4) The degree of automation of manufacturing technology is high, and the characteristics of large-scale industrial production are good. The technology of the TFT-LCD industry is mature, and the yield rate of large-scale production reaches more than 90%.

(5) TFT-LCD is easy to integrate and update, it is the perfect combination of large-scale semiconductor integrated circuit technology andlightsource technology, and there is great potential for continued development. There are currently amorphous, polycrystalline, and monocrystalline silicon TFT-LCDs, and in the future there will be TFTs of other materials, both glass substrates and plastic substrates.

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Intersil"s ISL78010 is an automotive-grade TFT-LCD power supply IC that is AEC-Q100 rated, fully ISO/TS 16949:2002 compliant and operates over the automotive temperature range of -40°C to +105°C. It is highly integrated to improve performance and reduce costs associated with powering 7-inch to 15-inch displays. The ISL78010 provides enhanced reliability against transients, with its higher voltage capability that protects against stray capacitance and parasitic inductances caused during switching.

The device integrates sequencing, regulated charge pumps, a 2 Amp FET, and fault protection for each output channel. This integration not only reduces costs and increases available board space, but the reduced component count improves a system"s overall mean time between failures (MTBF). The ISL78010 also has four highly accurate output channels for high performance. It is designed to deliver up to 20 V of boost voltage necessary for mid-size display panels and is available in a 5 mm x 5 mm TQFP package providing high reliability against vibration, as well as accommodating visual inspection of pins during board manufacture.For more information contact Arrow Altech Distribution, +27 (0)11 923 9600, [email protected], www.arrow.altech.co.za