Quad regulator takes care of LCDs Product News 12/30/2003 Post a comment Linear Technology's LT1943 quad output regulator is designed specifically to power and protect 22-inch and larger thin-film transistor liquid-crystal display (TFT LCD) panels. Included in the power block (three supplies for the display as well as a 3.3- or 5-V logic supply) is a 2.6-amp boost regulator to drive the TFTs, a high voltage TFT biasing output, an inverter for negative TFT biasing, and a 2.4-amp buck regulator to power VLOGIC. All of the switchers are synchronized to an internal 1.2 M
Active-clamp PWM controller peaks ZVS designs Product News 12/29/2003 Post a comment National Semiconductor's LM5025 is an active-clamp PWM controller for high-frequency forward converter topologies designed to boost the efficiency and power density of conventional forward regulators. Using the company's analog bipolar-CMOS-DMOS technology to cut external component count, the LM5025 integrates a 3-amp driver, 100-volt start-up bias regulator and a user programmable 1 MHz oscillator, and the chip exhibits a total propagation delay of less than 100 ns, thus suiting it to a variety
DC/DC driver IC addresses pre-biased loads Product News 12/29/2003 Post a comment Intersil's new ISL6608, for driving two n-channel power MOSFETs in synchronous-buck, multiphase power converters, features a diode-emulation mode that eases power-up into a pre-biased load and maximizes performance under light-load conditions.
First Digitally Controlled Microphone Preamplifier? Product News 12/24/2003 Post a comment TI introduced the industry's first digitally controlled microphone preamplifier IC. The PGA2500 is designed for use as a front end for high-performance analog-to-digital converters in a variety of professional audio applications, such as microphone preamplifiers, digital audio mixers and recorders, and broadcast and studio equipment.
Active-clamp PWM controllers tweak switchmode supplies Product News 12/19/2003 Post a comment Texas Instruments' newest generation of pulse-width modulation (PWM) controllers, the UCC2891 through UCC2894, are designed to significantly simplify implementation of active clamp/reset and synchronous rectifier topologies for high-efficiency switching power supplies. The peak current-mode controllers increase efficiency in off-line power supplies and DC/DC converters used in high-end desktops, servers, 48-volt telecommunications, data communications and 42-volt automotive systems.
Secondary-side drivers do more to protect MOSFETs Product News 12/19/2003 Post a comment Linear Technology's LTC3900 and LTC3901 are two secondary-side synchronous N-channel MOSFET drivers designed to go the extra mile to protect the external MOSFETs of a DC/DC converter during normal and light load operation, power up/down, and when the driver supply voltage drops too low. A programmable timeout function disables the synchronous drivers when the synchronization signal between the primary and secondary sides is missing or incorrect. Additionally, the ICs turn off the MOSFETs if indu
ICs regulate satellite receivers Product News 12/19/2003 Post a comment Allegro MicroSystems' four new low-noise block voltage regulators (LNBRs) are designed for satellite set-top box systems. They provide both power and interface signals to the LNB downconverter via the system's coaxial cable. The new chips provide the flexibility of two-way digital satellite equipment control (DiSEqC) encoding or, optionally, legacy system compatibility (non DiSEqC operation).
Looking ahead: Op Amps are hot and getting hotter Product News 12/18/2003 Post a comment What a year it has been for operational amplifiers, those versatile circuits that can be hooked up to your design in hundreds of ways. Several companies have introduced upwards of 50 different op amp products in 2003 with predictions to introduce similar numbers in 2004. In just the 100+ MHz region there were more than 150 new op amp introductions from the suppliers this year.
Design your op amps online Product News 12/16/2003 Post a comment National Semiconductor Corporation announced its Amplifiers Made Simple tool, the industry's first online design tool created to speed the selection, design and testing of many types of operational amplifiers.
Video decoder/de-interlacer solution for LCD displays Product News 12/15/2003 Post a comment Royal Philips Electronics introduced its SAA7154 single chip system solution - a video decoder, scaler and de-interlacer with picture improvements and memory less Edge Dependant De-Interlacing (EDDI) and LCD controller for use in Liquid Crystal Display (LCD) TV's, LCD monitors.
Over-voltage protection IC responds in a flash Product News 12/12/2003 Post a comment ON Semiconductor's NCP346 is an over-voltage protection circuit (OVP) optimized for applications with an external AC/DC adapter, car charger accessory or a battery charger. The NCP346 will protect battery chargers from high input-voltage events (up to 30-volt transients) by quickly disconnecting the charger from the adapter, responding to turn off a series PFET in less than 1 microsecond.
3-in-1 regulator shrinks DDR power solutions Product News 12/12/2003 Post a comment California Micro Devices bills its CM3131 family as the industry's first fully integrated, all-linear DDR voltage regulator solution for cost-sensitive PC and consumer set-top applications. These regulators provide VDDQ, VTT and VSTBY power for DDR and DDR II SDRAM memories. The CM3131, according to the company, differs from existing switching regulator based solutions by doing away with the need for multiple external FETs and inductors, thus cutting solution costs by up to 70 percent and board
Fastest Low Noise Amplifier? Product News 12/11/2003 Post a comment Intersil Corporation introduced six new low noise amplifiers. According to the company one of the family members, the EL5132 represents, an architectural breakthrough since it keeps the noise down while consuming a low current of only 11 mA.
When Analog and Digital Co-exist on One Chip: Advanced Data Conversion Architectures News & Analysis 12/11/2003 Post a comment Data conversion technology is a vital element in a wide
variety of new-generation applications ranging from
communications to consumer goods, says Analog Devices in this informative NetSeminar. Data converters must
constantly evolve to meet stringent new system and
market demands for higher accuracy and speeds, and
lower-power and cost. In many modern systems, data
converters are one of the key signal processing
elements and are relied-upon to enable next-generation
system performance an
What have you done for me today? Product News 12/9/2003 Post a comment Op amps are available for almost every design need you have. Design engineers tend to take them for granted because they expect that there will be one for just the design they are building. However, no matter what op amp suppliers provide engineers always want it tweaked a little bit so it works just right for their application.
NamTai EyeToy for Sony PS2: Gaming grows eyes Teardown 12/9/2003 Post a comment You've seen young people acting stupid at Fry's and Best Buy. Here's the reason: computer games have eyes. A camera attachment for the PS2 has the ability to track body motions and gestures. From the forthcoming December issue of Planet Analog magazine, Portelligent's David Carey lifts its lid and finds analog.
Motor-drive modules combine the best of GTOs and IGBTs News & Analysis 12/9/2003 Post a comment The IGBT-7 Series of 1200-volt insulated gate bipolar transistor modules from Toshiba America Electronic Components tout higher operating frequency and reliability in general inverter and motor drive applications, owing to its new injection enhancement gate transistor process and trench structure. As a result, the nine new modules, rated from 50 to 600 amps, combine the best features of traditional gate turn-off (GTO) thyristors and IGBTs.
PFC controller IC saves a stage News & Analysis 12/9/2003 Post a comment ON Semiconductor bills its NCP1651 as the first integrated single-stage, active power-factor-correction and step-down controller. The controller eases the task of meeting the IEC1000-3-2 harmonic requirements for isolated AC/DC converters with mid to high output voltage requirements at powers up to 200 watts. It drives a flyback converter topology and programs the average input current to follow the line voltage in order to provide unity power factor.
Cap-free, reverse-current-protected LDOs simplify portable design News & Analysis 12/9/2003 Post a comment Texas Instruments' three new families of low drop-out linear regulators (LDOs) feature reverse leakage current protection and extremely low noise, and don't require an output capacitor. The new LDOs, which deliver standard outputs at 5, 3.3, 3, 2.5, 1.8, 1.5 and an adjustable 1.2 to 5.5 V, are designed for 150-, 250- and 400-mA applications.
14-bit, 125-MSPS A/D converter Opens Up Path to Advanced Signal Processing News & Analysis 12/9/2003 Post a comment Texas Instruments has acknowledged that it is playing catch up to Analog Devices in the high-speed data converter market. Promoted with poster ads that say, "Go fast," TI has introduced a 14-bit, 125 Msamples/s pipeline A/D converter with a conservative 750 mW power dissipation. The company says this enables next-generation, high-performance portable wireless, test and measurement and video imaging systems. Paul O'Shea strokes his chin.
Cell balancing maximizes the capacity of multi-cell batteries News & Analysis 12/8/2003 Post a comment Common multiple cell configurations for Li-Ion cells in battery packs consist of three or four cells in series, with one or more cells in parallel. This combination gives both the voltage and power necessary for Portable Computer, medical, test and industrial applications. While these configurations are common in many battery powered applications, they may not be as efficient as they could be, write Xicor engineers. The reason for this is that any capacity mismatch between cells in a series conn
Spreadsheet tools estimate available wattage for Power over Ethernet applications News & Analysis 12/3/2003 Post a comment The recently approved 802.3af Power over Ethernet standard is gaining wide industry acceptance. But the appliance designer is faced with both a limited number of choices about getting power to the application, and a limitation in the amount of power that is available to the application's functional circuits. A Texas Instruments engineer calculates how much power is available, and suggests some tools and techniques that will help you maximize what's available.
Audio chip aims at loaded cell phones Product News 12/3/2003 Post a comment Integration is a gateway to success in the developing market for handheld, cellular-based gadgets. By combining phone service, Web access, audio and some degree of video, these devices look set to open a new replacement market in the rapidly saturating cellular handset business. In addition to meeting end-user demand, these devices must be highly compact, and bundling all these features into a compact package can only happen at the outer limits of integration and power management. To that end, W
Simple logic circuit doubles input frequency News & Analysis 12/3/2003 Post a comment The versatile phase-locked loop allows multiplication of a reference frequency with an operating frequency that ranges from "DC to daylight," writes John Guy, a Maxim applications engineer. But a PLL is overkill for some applications, he says, especially if the input frequency only needs to be doubled. Be amazed at what you can do with an op amp and a logic gate.
Startup bolts smart antennas to existing WiFi chip sets News & Analysis 12/3/2003 Post a comment Startup Motia came out of stealth mode to announce its first product Tuesday (Dec. 2), an analog signal processing chip that brings smart antenna technology to 2.4-GHz wireless LAN cards and access points. The Stamford, Conn.-based company claims its Javelin chip can improve the gain of existing 802.11b and .11g signals by 6 to 18 dB. Rick Merrit reports.
Digital vs. Analog Design for a Multi-Gigabit SerDes News & Analysis 12/2/2003 Post a comment Market demands are continually pushing semiconductor developers to design smaller, faster chips that consume less power. This article by TriCN's Hansel Collins and Steve McConnell addresses the drivers in the market creating the demand for these smaller, faster, less power-intensive interfaces, the challenges in designing them, and the advantages of digital design techniques in the implementation of these new high-performance interfaces.