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Led current mainstream ASIC Performance Comparison
Led current mainstream ASIC Performance Comparison
Led current mainstream ASIC Performance Comparison
TOSHIBA products, cost-effective high share in the domestic market is also the highest. The main products are TB62705, TB62706, TB62725, TB62726, TB62718, TB62719, TB62727, etc.. One TB62705, TB62725 is 8-bit source chip, TB62706, TB62726 16-bit source chip. TB62725, TB62726 are TB62705, TB62706 upgrade chip. Error in the current output of these products (including spaces between rooms and on-chip error), the data shift clock, supply voltage and chip power consumption are improved. As a mid-range chip, the current "TB62725, TB62726 TB62705 and has gradually replaced the TB62706. In addition, TB62726 there is a narrow body package TB62726AFNA chip, the width of only 6.3mm (TB62706 the patch package chip width 8.2mm), this more suitable for narrow-body package, the distance between the use of a smaller screen. be noted that, AFNA common package pin package with a different definition of (anti-clockwise rotation by 90 degrees). TB62718, TB62719 is aimed at high-end market TOSHIBA introduction of driver chips, in addition to a common constant current chip features, but also increased the generation mechanism 256 grayscale (8-bit PWM), an internal current regulator, the temperature overheat protection (TSD) and the output open detection (LOD) and other functions . such a chip for the high-end full-color Led display, and obviously, its price Ye cheap. TB62727 of new products for the TOSHIBA, mainly in the TB62726 based on the increase of the current regulation, temperature alarm and Shu Chu open Jiance 等 features, the market positioned between TB62719 (718) and between TB62726 planned October 2003 production.
TI as a world-class IC manufacturers, the performance of their products do not use the natural question. However, early development of the Chinese Led market weak, the market share is not high. The main products are TLC5921, TLC5930 and TLC5911, etc.. TLC5921 is a TSD, LOD function of high-precision 16-bit source driver chip, the bits between the current error is ± 4%, but prices have been high until recently dropped to a level with TB72726 considerable. TLC5930 is a 1024 gray (10-bit PWM) 12-bit source chip, with 64 adjustable brightness feature. TLC5911 is positioned to drive high-end chip market with a 1024 gray, 64 brightness adjustable, TSD, LOD and other functions of the 16-bit source chip. TLC5921 and TLC5930 chip in the bottom of a metal heat sink, we should pay attention to avoid the practical application of Led light feet, otherwise leakage caused by Led lights dimmed.
SONY product has been targeted at high-end market, Led driver chips are no exception, the main products are CXA3281N and CXR3596R. CXA3281N chip is 8-bit source with a 4096 gray mechanism (12-bit PWM), 256 brightness adjustment, 1024 output current regulation, TSD, LOD, and LSD (output short-circuit test) functions. CXA3281N primarily designed for static drive mode, the maximum output current of only 40mA. CXA3596R is a 16-bit source chip, functions inherited all the characteristics of CXA3281N mainly to increase the output current (from 40mA to 80mA) and the current source output into large ones (from 8 to 16). CXA3281N-chip current price of more than one U.S. dollar, CXA3596R price of 2 dollars.
MBI (Macroblock) TOSHIBA products essentially corresponds to mid-range products, pin and function compatible, in addition to the external set resistor current source is slightly different things, basically can use direct substitution. The product's price is lower than the TOSHIBA 10 to 20%, mid-range display is a good choice. MBI's MBl5001 and MBl5016 corresponding respectively TB62705 and TB62706, MBl5168 1000 MBl5026 points the other (j correspond with TB62725 TB62726 Wo Hau. In addition, there is a function of its new products LOD MBl5169 (8 digital source), MBl5027 (16 digital source ), 64-step brightness adjustment function MBl5170 (8 digital source) and MBl5028 (16 digital source). with the LOD and the brightness adjustment function chip MBI's Share-I-OTM technology, the chip pin completely without a functional chip, such as MBl5168 and MBl5026 compatible. In this way, you can not change the case of driver board design can be upgraded to the new features.
SITI (Point Crystal Technology) is a professional manufacturer in Taiwan Led driver IC company, its products and stable performance. Point of crystal orientation and TOSHIBA similar technology, performance and price their products fairly. But do not pin compatible. Point of crystal products are ST2221A, ST2221C, DMl34, DMl35, DMl36, DMl33 and ST2226A so. In addition ST2221A 8-bit source, the rest are 16-bit source chip. DMl34, DMl35 Wo Hau DMl36 is ST2221C upgrade products. The three chips is the difference between the output current different, DMl34 output current of 40-90mA, DMl35 output current 10-50mA, DMl36 output current of 3-15mA. DMl33 with 64 brightness adjustable, LOD and TSD functions. ST2226A with 1024 gray mechanism (10 PWM), a high-end chips.
Led Driver IC from several major manufacturers of the product structure, the constant current Led chip is divided into three grades. First grade is a gray mechanism chips, such chips have an internal PWM body of data generated from the input gray, deep gray form more easily achieve the high quality picture. The second grade is a LOD, TSD, brightness adjustment function of the chip, these chips have additional functions as more suitable for specific occasions, such as variable information for the board, with Led error detection function. The third file without any additional features for the constant current source of chips, such chips only provide high-precision Led constant current source, to ensure the quality of the display screen body good.
