摘要：本應(yīng)用筆記介紹了一種擴(kuò)展掃描的方法，可以擴(kuò)展MAX6954和MAX6955 LED顯示驅(qū)動(dòng)器的鍵盤(pán)掃描范圍，從32鍵擴(kuò)展到80鍵。 MAX6954/MAX6955是4線或2線串行接口的LED驅(qū)動(dòng)器，...

摘要：該應(yīng)用筆記詳細(xì)說(shuō)明了如何使用MAX6958和MAX6959 LED顯示驅(qū)動(dòng)器實(shí)現(xiàn)象素級(jí)(單個(gè)LED)亮度控制。該技術(shù)增強(qiáng)了這些驅(qū)動(dòng)器內(nèi)置的64級(jí)整體(一次調(diào)整所有LED)亮度控制功能。 ...

摘要：本應(yīng)用筆記提供了一個(gè)驅(qū)動(dòng)高亮度LED的簡(jiǎn)單電路，只需很少的外圍元件，并提供了線性和PWM亮度調(diào)節(jié)的功能。非常適合Osram、Lumiled、Cree和Nichia LED。 概述...

摘要：本文討論的簡(jiǎn)單電路能夠調(diào)節(jié)高亮度LED的驅(qū)動(dòng)電流，該電路采用非定制、高度集成的降壓型開(kāi)關(guān)調(diào)節(jié)器(MAX5035)，能夠準(zhǔn)確地控制流過(guò)LED的電流。MAX5035 DC/DC轉(zhuǎn)換器在7.5V至76V寬輸...

Abstract: Gamma correction is used to correct for the nonlinear relationship between luminance and brightness. This application note presents an assembly program written for the MAXQ2000 microcontroller (µC) that uses gamma correctio...

摘要：本應(yīng)用筆記介紹了一套基于MAX6960顯示驅(qū)動(dòng)器和MAXQ2000微控制器(MAXQ20內(nèi)核)的股價(jià)顯示系統(tǒng)，并提供了構(gòu)建該系統(tǒng)的所有必備信息。其中包括電路原理圖、Windows軟件和微控制器...

摘要：本應(yīng)用筆記說(shuō)明MAX6951/MAX6950 LED驅(qū)動(dòng)器和MAXQ2000的SPI外設(shè)通信的匯編程序設(shè)計(jì)。 引言MAX6950和MAX6951分別為5位和8位共陰極LED顯示驅(qū)動(dòng)器，通過(guò)高速SPI 接口控...

Abstract: A white-LED driver based on a DC-DC step-up converter operates on one or two alkaline cells, and starts with voltages as low as 0.8V. Replacing incandescent bulbs with high-power white LEDs yields higher reliabi...

Abstract: A common brightness-control circuit for LEDs uses an electrically controlled potentiometer (EPOT) to achieve digital control of the LED brightness. Replacing the EPOT with an RC network, however, reduces both the IC count and the...

摘要：電路驅(qū)動(dòng)一只大功率白光LED (WLED)，當(dāng)溫度過(guò)高以及熱敏電阻發(fā)生開(kāi)路或短路故障時(shí)，將關(guān)閉LED。 具備高溫保護(hù)功能的白光LED驅(qū)動(dòng)器 摘要：電路驅(qū)動(dòng)一只大功率...

摘要：本指南給出了MAX6956 LED顯示驅(qū)動(dòng)器以及I/O擴(kuò)展器編程的詳細(xì)信息。同時(shí)還討論了類似器件(MAX6957、MAX7300以及MAX7301)的一些編程技巧。 概述MAX6956 LED驅(qū)動(dòng)器...

摘要：本參考設(shè)計(jì)是汽車LED應(yīng)用的完整系統(tǒng)設(shè)計(jì)。采用MAX15005電流模式控制器，將標(biāo)準(zhǔn)鉛酸汽車電池的電壓升至21V，用于驅(qū)動(dòng)一串汽車LED。 下列提供了汽車LED系統(tǒng)的參...

Abstract: This note shows an application circuit and provides all the firmware required to interface the MAXQ2000 microcontroller evaluation (EV) kit to the MAX6970, an 8-port, 36V constant-current LED driver. Included in this application ...

Abstract: Currently, all of the top LED video-display board manufacturers have similar but proprietary architectures using LED video bricks of different color pixel sizes. Maxim has taken its knowledge of these applications and incorporate...

Abstract: This application notes shows how to buffer the triplex backplane drive outputs of a LCD driver such as MAX7231 family to increase the capacitive drive capability. This enables a large LCD to be driven without ghosting and other a...

Abstract: Manufacturers of portable equipment, workstations, small handheld computers, cell phones, and video games use flat panel displays to display text and images. Electro-mechanical potentiometers have been the typical mechanism used ...

A stringent height limitation on the PC boards for personal digital assistants (PDAs) and palmtop computers compels the use of expensive, low-profile inductors in switch-mode power supplies. As an alternative, however, certain switch-mode ...

Abstract: The DS1050 is a 5-bit pulse-width modulator (PWM) controlled by a 2-wire bus. This allows a single master device to control up to 8 slave (DS1050 and other 2-wire devices) on a single 2-wire bus. In this application note, an inte...

Abstract: The digital, pulse-width-modulation (PWM) output available from many microprocessors is based on an internal 8- or 16-bit counter and features a programmable duty cycle. It is suitable for adjusting the output of an LCD driver, a...