http://www.maxim-ic.com Maxim - Whats New en Copyright 2008, Maxim Inc Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/new info2@maxim-ic.com info2@maxim-ic.com 10 http://media.maxim-ic.com/maxkit/images/max_logo_header.gif http:www.maxim-ic.com 88 31 Maxim Logo http://www.maxim-ic.com/appnotes.cfm/an_pk/4369 This is 6A step-down LED driver based on the MAX16821 device. This circuit drives a single LED. This application note includes the circuit specifications, circuit schematic, and circuit description and performance. http://www.maxim-ic.com/appnotes.cfm/an_pk/4369 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4385 This application note presents a reference design for a signal-lamp linear LED driver that consists of six strings of 4 LEDs per string and delivers 350mA per string with a common cathode configuration. Common cathode arrangements require that the current-sense resistors be placed on the high (anode) side, which forces the LED drivers to use a level shifter. http://www.maxim-ic.com/appnotes.cfm/an_pk/4385 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4335 Consumers demand long battery life in their portable devices. Meanwhile for nonportable devices, increasing energy costs and the latest Energy Star&reg; guidelines are focusing public awareness on wasted standby power. Thus, meeting green energy regulations and reducing standby power has become designers’ new mantra, especially when systems are active 24 hours a day. To meet the lower power-consumption levels, circuit designers know that the devil is in the details, with every single circuit required to justify its current budget. This article shows how Maxim chips can help system designers reduce the power budget of typical systems. The examples highlight just a few of the products in Maxim’s broad portfolio of ultra-low-current devices. http://www.maxim-ic.com/appnotes.cfm/an_pk/4335 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4383 This is a reference design for a SEPIC/linear LED-display backlight driver for eight parallel strings of 8 WLEDs (white LEDs) at70mA/string. The dimming ratio is 4000:1. The input voltage is 16V to 36V with 50V transients. The design combines a SEPIC switching power supply with adaptive feedback and linear current sinks for high dimming ratios. The MAX16809 16-channel LED driver is featured. http://www.maxim-ic.com/appnotes.cfm/an_pk/4383 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4420 This application note discusses the code and data segment facility provided by MAX-IDE for applications programming on MAXQ&reg; microcontrollers. The code and data segment mechanism provides a way to automatically declare variable locations in data memory and to initialize those variables with starting values. Application code can then be used to cache those variable values in flash memory and restore them as needed. This approach allows an assembly-based application to take advantage of the data segment autoloading provided by MAX-IDE, while still operating consistently whether or not the microcontroller is connected to a JTAG debugger. The MAXQ2000 microcontroller EV kit is used to demonstrate the method and code examples are provided in the text. http://www.maxim-ic.com/appnotes.cfm/an_pk/4420 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4449 This application note presents the MAX9890 and MAX9892 which use different approaches to remove audible click and pop from headphones. Each device is uniquely suited to different applications. http://www.maxim-ic.com/appnotes.cfm/an_pk/4449 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4381 This application note presents a reference design for a 4S1P MR-16 LED driver that provides 750mA to a string of four white LEDs (WLEDs). The circuit operates from a 24V source and is based around the MAX16820 hysteretic LED driver. Also included is a MAX5033 24V-to-5V, 150mA switching power supply to power a Nuventix&reg; pulsating LED cooler. http://www.maxim-ic.com/appnotes.cfm/an_pk/4381 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4382 This application note presents a reference design for an AR111 lamp LED driver with two parallel strings of five LEDs (5S2P). Using the MAX16819 in buck-boost mode, the circuit operates from 12VAC and delivers an average current of 500mA per string. http://www.maxim-ic.com/appnotes.cfm/an_pk/4382 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/74 This application note presents the electrical aspect of the 1-Wire protocol for new and legacy devices. A special section explains how to determine appropriate timing parameters for a network comprised of both old and new 1-Wire slaves. The 1-Wire Master Concepts section provides references to other documents that discuss 1-Wire masters in detail and to the related software. http://www.maxim-ic.com/appnotes.cfm/an_pk/74 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4387 This application note presents a reference design for a nonisolated LED driver intended to operate directly from a 400V_DC input. The design drives a string of 27 WLEDs (white LEDs) or, optionally, 6 amber LEDs at 400mA. The topology is a discontinuous flyback with a transformer. The MAX16801 HB (high brightness) LED controller is featured. http://www.maxim-ic.com/appnotes.cfm/an_pk/4387 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4409 This application note presents a simple circuit that combines an ADC with a small USB module to make an 8-channel, 16-bit measuring system. The MAX1168 ADC is featured. http://www.maxim-ic.com/appnotes.cfm/an_pk/4409 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4328 Providing power to drive high-brightness LEDs (HB LEDs) can be achieved by a number of different schemes. Because many systems are battery powered, energy efficiency is key to maximizing each battery charge and the system's operating time. By improving battery efficiency you also improve the system's "green" footprint. Over the life of the battery for the same number of charge cycles, longer times between charges translate into potentially hundreds of hours of additional use from the batteries. Thus fewer batteries may end up in landfills or hazardous waste-disposal sites. http://www.maxim-ic.com/appnotes.cfm/an_pk/4328 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4451 This application note shows how the MAX2170 triple-band (T-DMB, DAB, FM) receiver's input-scattering parameter (S11) is measured for the VHF and L-band inputs. http://www.maxim-ic.com/appnotes.cfm/an_pk/4451 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4354 Charge pumps are often the best choice for powering an application requiring a combination of low-power, low-voltage operation and low cost. This application note explains how to supply the <a href=/MAX13041>MAX13041</a> HS-CAN transceiver with the <a href=/MAX683>MAX683</a>, a 3.3V-input-to-regulated-5V-output charge pump. It also discusses the impact on electromagnetic emissions and immunity. http://www.maxim-ic.com/appnotes.cfm/an_pk/4354 Fri, 10 Jul 2009 11:42:5 GMT http://www.maxim-ic.com/appnotes.cfm/an_pk/4405 This application shows how to use a spare op amp to generate a regulated negative voltage supply, used to power the op amp itself as well as other low current circuitry. The regulated negative supply is generated from a regulated positive voltage and an unregulated negative voltage. http://www.maxim-ic.com/appnotes.cfm/an_pk/4405 Fri, 10 Jul 2009 11:42:5 GMT