The ic and discrete combination offers the ultimate cost vs performance solution for led backlight applications. Backlight led drivers products microchip technology inc. Lcd electroluminescent backlight driver circuit youtube. An lcd driver also referred to as an lcd display driver or lcd controller is an integrated circuit that provides an interface between a microprocessor mpu or microcontroller mcu system and a liquid crystal display lcd. Maxims continually expanding portfolio includes products covering the full range of efficient switchmode topologies stepdown.
The output current can be adjusted separately for each channel by 8bit analog dimming control up to 20 ma per channel and 12bit internal pwm dimming control. Backlighting led driver technical documents led driver. Backlight inverter driver ic id electronics forums. Led driver ic s highbrightness led drivers are integrated circuits that are optimized to efficiently drive strings of highbrightness leds. Every kit shipped before 4072009 has an lcd which actually includes an electroluminescent backlight. A configurable bill of materials allows the designer to create a highly efficient solution for a variety of lcd screen sizes. Direct ac led driver solution accurate led cc regulation. I need help identifying an ic for the backlight inverters in the sharp lc15sh7u. Kits shipped on 4072009 or newer have an ledbased backlight, so this video does not apply. With 12 output channels, a single led1202 can drive four rgb leds running up to eight programmable patterns and stored sequences.
This part of our web site contains the data sheets for the liquid crystal display drivers and controllers. Driver 1 fpga host mcu video usb dvi spi 12 leds per string, 64 led strings, total 768 leds i 80ma 20 monitor screen 8ch driver 2 driver 3 driver 4 driver 5 driver 6 driver 7 driver 8 high speed differential interface direct type led backlighting local dimming block diagram led backlighting types and dimming modes, contd. It consists of an oscillator, a frequency divider, a coil driving circuit and a switched h. D305a ic electroluminescent lamp driver ic ctrends. Contact your local microchip sales representative or distributor for volume and or discount pricing. Lm36274 integrated backlight driver with lcd bias, 4, 2.
Troubleshooting lcd monitor led backlight circuit page 1. These ics control the complex ac voltage requirements for the lcds and they need a lcd controller to keep refreshing the individual pixel. Global led backlight display driver ics market research. Led backlight driver ics control the voltage and current for white leds used to illuminate lcd panels. Lp8553 is a highvoltage led driver for medium sized lcd backlight applications. Digital and mixed signal, single and dualstage high voltage control ics for led drivers. A wide variety of backlight ic options are available to you, such as other, logic ics, and drive ic. The d388 chips integrated design delivers an efficient answer for multiple backlighting technologies that are used in the various sections of wireless handsets and other applications. An innovative synchronization feature allows connecting. The tps61185 ic supports boost switch frequency programming from 600khz to 2mhz by an external resistor on the fsw pin. Additional component manufacturers may be found by selecting the components icon below, or equipment manufacturers may be found by selecting the oem equipment icon. Led backlight driver ic princeton technology corporation.
It comprises a highefficiency boost converter with an integrated 2a, 40v power mosfet, and six current sink regulators. Diodes led drivers for displayslcd screens consist of highefficiency and highswitching frequencies make them well suited to modern consumer equipment. We show how to build a driver for a highvoltage electroluminescent backlight using an inductor, microcontroller, and a handful of other components. The prices are representative and do not reflect final pricing. A d backlight suppliers, manufacturer, distributor. Nerdkits lcd backlight electroluminescent inverter. Backlight led drivers technical documents how to use analog dimming with the tps6116x this application report shows a simple, external circuit that can be used to perform analog dimming from pwm signals that are below 5 khz. There are no capacitors around that suspect yellowed area, so it is not flux. Discussion in electronic design started by tom twist, aug 10, 2005. I2c controlled white led driver ic for backlight general description package outline the njw4605 is a high efficiency multiple strings white led driver for backlight. Replacement of led driver ic, replacement corroded resistors, fixed board traces. Automotive infotainment systems, one of the enduse segments analyzed and sized in this study, displays the potential to grow at over 4. Led driver ic for lighting applications stmicroelectronics. Markets rogers partners with customers in a wide range of industries, providing advanced materials to power, protect and connect our world.
D372a electroluminescent lamp driver ic data sheet ctrends. This is a listing of digital lcd and led driver ic manufacturers. Max14514 dual electroluminescent lamp driver maxim integrated. Led control ics for solidstate lighting luminaires infineons control ics for led drivers deliver excellent power quality and high efficiency for led lighting applications supporting dimming levels down to 1%.
Led solutions for lcd backlighting mouser electronics. The mic4826 and mic4827, were designed and developed by micrel semiconductor nasdao. I tried to look up the datasheet for that ic but it is another cryptic one that comes up with no hits. High efficient 6channel wled driver supporting single. Ncs29001 led backlight driver the ncs29001 is an integrated led driver used in lcd display backlighting applications. Typical applications include portable appliances such as smartphones, tablets, cameras, notebook pcs as well as displays such as computer monitor and tv. Macbook air 2015 no backlight due to water damage led driver. This driver ic uses a proprietary circuit design for programmable waveshaping for lownoise performance in applications that are sensitive to audible and electrical noise, such as cellular. This device is composed with 3channel constant current drivers, stepup switching regulator that can drive up to 24pcs led. System solutions technology integration and innovation excellent technical support stmicroelectronics, datapoint and darnell 2008 isupply 2010. Electroluminescent backlights are hard to drive because they actually require about 100 volts ac at around 150 hz, and were just running our logic.
The ic is marked as follows 2215 6m1 60st it is an 8 pin soic, no mfg label on it. Mc33441 electroluminescent lamp driver ic the mc33441 is a dc. The ncs29001 uses a boost type converter to deliver constant current in a string of leds. The lamp outputs of the device generate up to 300v pp for maximum lamp. The device also provides a driver output for an optional external pfet connected between the input and inductor for truly disconnecting the. The tps61176 is an integrated wled backlight driver for tablets or notebook pcs using singlecell batteries. Alibaba offers 495 a d backlight suppliers, and a d backlight manufacturers, distributors, factories, companies. Youre right, it looks like something got cooked there. Dcdc led backlight drivers products dialog semiconductor.
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