2200µF tantalums in low-profile package

A new high capacity PulseCap tantalum capacitor in a low profile package, was introduced by AVX. The capacitors are designed for applications such as PCMCIA / Wireless USB cards express bulk capacity is needed for power of the issuer.

The large case tantalum products listed at 2200F (2.2mF) / 6.3V. A maximum of 2 mm height of the cases makes them ideal for smaller applications. The extinction undertab style, where the "J" are replaced by the excellent dismissal led outside the perimeter of the case, the increase in volumetric EFFICIENCY parties and can be placed on the foot, so important economies of the area.

PulseCap devices are RoHS compliant and can meet up to 3x reflow soldering profile 260C. Operating temperature range is-55c to 125 C. Other applications include wireless data cards sensors and counting, says the company.

"Our new capacitors PulseCap devices complement our BestCap low ESR. Unlike other cases of large size, high capacity devices, where his Pulse Caps surface mount devices are lead-free reflow assembly process. They also have more space on a PCB and offer excellent robustness thrust, "said Thomas Zednicek, technical marketing, AVX.

DC-DC Converters, which feature an ultra-wide 4:1 Input and Provide 50 to 200W of Output Power

A new line of rugged DC-DC converters with a high 4:1 and 50 to 200W of power, was introduced by CUI Europe.

The chassis for installation are included in an aluminum enclosure measuring 4.25 x 4 x 1.5 cm and is equipped with a heat sink to improve thermal performance. VHK The series is seen as ideal for a variety of communication and industrial applications where robust is needed.

Users can choose from a range of input from 9 to 36VDC or 72VDC and 18 to output voltage of 3.3, 5, 12, 15, 24 or 48DC. The range of the standard operating temperature is-40C 85c, 50W with the operational model 60C under convection-cooled conditions. Security features include serial VHK most temperature, input transient and short circuit protection.

Additional features include high efficiency, fast transient response remote sense, remote on / off, says the company.

Mini-USB AC-DC Power Adapters

Emerson Network Power has its line of serial DCH3 Wall mount AC-DC power adapter with the addition of four new models (DCH3-050XX-004) which are equipped with the results to support cable less removable USB Mini / Micro - USB 2.0 output cables. This compact power adapters have a small size and are intended to be worn by consumers of portable electronic devices - such as PDAs, digital cameras and mobile phones - a 5 V power supply and the use of the Mini-USB connectors for their contributions .

DCH3 Series AC-DC power adapter, universal feature 100 to 254 Vac inputs offered in four models (U.S., EU, UK and has recently introduced models AU), each configured with the input to accept the different regions of the world they are intended to be used. Moreover, all four adapters generate regulated 5V output with an output of 3 watts and meet the strict Energy Star standards for efficiency level IV.

The series offers comprehensive protection against overvoltage and short circuit, and built in EMI filtering and safety approvals, including UL/cUL60950-1 and EN60950-1 VDE. The flexibility of the serial adapter also supports a wide range of ambient operating temperatures of 0 to 45 degrees Celsius, a best-in-class ground maximum leakage current of 10 microamperes and a voltage / current output.

Voltage Regulator Enhances Control and Improves Efficiency from Ericsson

A digital, non-isolated voltage regulator estimated at 40A, the BMR451, was announced by Ericsson power modules. After the recent publication BMR450 rated 20A, the new device has a high density of the current 7.90A/cm3 (129A/in3)

Thanks to its high power density and flexibility offered by the different functions integrated into the product, and offering the possibility to monitor the vital signs through the open standard PMBus interface, BMR451 adapted to a wide range of applications in information and communication technology - but is not limited to these two questions.

The BMR451 be adapted to new uses or applications to be upgraded to reduce energy consumption, and / or migration of passive energy for the active monitoring of energy use and management. Since the mid-bus architecture is not limited to ICT applications, because of its high power density and low profile (less than 8.5mm), the BMR451 is regarded as an ideal product for all applications space was Card and a good thermal performance are critical interest, such as in industrial process control, seal the box, test equipment or transportation applications. The small voltage regulators are easier to find close to FPGA, DSP and other processors, making the power failure and parasitic inductance issues.

Factors behind the need for this type of product are reducing consumption of energy produced by improving efficiency, but also the requirement of designers permanent access to strategic information of all the chain of service, the front-end of the rectifier loading point.

In comparison with existing products, Ericsson BMR451 offers an unparalleled level of functions (reading data back) via the open standard interface, PMBus. For system designers and architects, through PMBus access to strategic information, such as tax, the state of the load, temperature, the voltage differences, and many other parameters can Follow-level functions, without adding external components or circuitry.

In addition to cost savings and simplicity, resulting in fewer external components and embedded control, system architects now have the chance to follow through the power of each voltage regulator, perform low-level functions.

The PMBus read mode compatible BMR451 as 30.85mm x 20mm x 8.2mm, offers a 4.5V to 14V input voltage range, a 0.6 V to 3.6 V output voltage range and a 2.6 million hours MTBF figure. Through hole and surface mount versions are available.

Another important advantage of a digital controller is the ability for users to purchase pre-made modules that fit their applications ", such requirement ramp-up time, output voltage, alarms, etc. BMR451 also has a full range of standard features such as remote on / off, over temperature protection, output / voltage greater protection, input under-voltage protection and control Remote monitoring can be used to control redundancy.

The BMR451 has a "unique" serial number that refers to its chipset. This provides an unprecedented degree of traceability and the simplification of the administration party identification when performing diagnostics on board during the entire lifetime of the final equipment, says the company.

"It is with great pride, and with great appreciation for our development team worked from basic research through production of commercial products, as we launch 40A, digital BMR451," said Patrick Le Fèvre, marketing and communications Power Modules. "With this product, in combination with the recently released BMR450 rated 20A, and our success PMBus compliant 400W quarter-brick isolated BMR453 we are now allowing customers to a new era of applications that are optimized for energy efficiency, which unprecedented degree of flexibility to monitor and control through the open standard PMBus, low-energy component".

International Rectifier - New range of industrial trench HEXFET power MOSFETs

A new range of trench HEXFET power MOSFETs has been unveiled by International Rectifier. The devices feature low baseline state resistance (RDS (ON)) in an A-247 packages for synchronous recovery, and active ORing including industrial applications of high power DC motors, DC to AC inverters and power tools.

The new MOSFETs feature improved up to 50 per cent in RDS (on) on competing devices, eliminating the need for large, costly packages typically used in industrial applications, and cutting overall system cost. In addition, the low RDS (on) results in lower conduction losses and improving the efficiency of the system.

The superior RDS (ON) noted that family to enable designers to reduce system cost by almost 50 percent in avoiding large and expensive isotopes or mini BLOCK packages typically required to dissipate heat in industrial applications.

The new family of N-channel MOSFETs provide a voltage range from 40V to 200V. The devices are qualified industrial grade and moisture sensitivity level 1 (MSL1). The new MOSFETs are available and are lead-free RoHS compliant, says the company.

AVX - High capacitance tantalums save up to 60 percent board space

A new termination style for MnO2 (TLN Series) and polymer (TCN Series) tantalum capacitors has been announced by AVX. It reduces the required internal construction space by up to 60 percent and enables parts to be positioned very closely together, says the company.

In the new configuration, ‘J’ leads are replaced by ‘undertab’ terminations that do not protrude outside of the outline of the case. This design not only increases volumetric EFFICIENCY, but also allows printed circuit board (PCB) footprint pads to be spaced only slightly wider than the part itself.

This package construction features a second electrode, which results in a lower self inductance (ESL), enabling a better working frequency range. Ignition resistance is also significantly improved with polymer TCN Series version.

The new undertab termination design significantly reduces the footprint on the PCB, while increasing performing characteristics. The reduction in size and space makes the TLN and TCN Series tantalum capacitors ideal for any application that requires component miniaturization.

Available in low-profile packaging, the smallest devices measure just 1mm in height. The planned capacitance range is 22 - 680µF (+/- 20%), and working voltage range 4-10V. The first devices available are the TLN S case (1206, 1.2mm max height) 220µF 4V product, and TCN L case (1210 1mm max height) 150µF 6.3V capacitor. Devices are suitable for 3 x 260C reflow solder processing.

The capacitors are designed for use in any application that requires high capacitance in a miniature package, particularly consumer products such as handheld devices, mobile phones and MP3 players, as well as suit POWER line and audio circuit designs.

Fairchild - Smallest 8A buck regulator achieves 95 percent peak efficiency

Enabling POWER designers to achieve higher output current and high EFFICIENCY using less PCB space, Fairchild Semiconductor offers its TinyBuckTM DC-DC regulator. The FAN2108 is an 8A, fully-integrated synchronous buck converter that drives efficiency over a wide input voltage range (3V to 24V) for applications such as set-top boxes, graphic cards, point of load (POL) and industrial power network devices.

Alternate solutions achieve efficiency by using additional discrete components or require significant board space - lengthening design time and increasing the size of the end application. The TinyBuck integrates the controller, MOSFETs, and boot diode into a slim 5mm x 6mm MLP footprint - making it the industry's smallest 8A solution. The FAN2108 has been designed with Fairchild's PowerTrench MOSFET process with extremely low Figure of Merit (FOM) to reduce conduction and switching losses. At 12V input and 8A load current, the FAN2108 delivers 92 percent efficiency at 3.3V output and 87 percent efficiency at 1.8V output. At 5V input and 3.3V output, this device achieves a peak efficiency of 95 percent.

The FAN2108 offers multiple protection features such as over-voltage, over-current, short-circuit and over-temperature. It also features pre-bias startup, allowing the regulator to start-up on a pre-biased output and ensures that the output is not discharged during the soft-start cycle, protecting system ICs from damage.

The TinyBuck regulator is part of a family of all-in-one regulators that improve efficiency, while simplifying designs. This family includes a 3A version, the FAN2103 that offers 95 percent efficiency for graphic cards, set-top boxes, servers and point of load (POL) applications. The 6A version, the FAN2106, won the prestigious 2007 EDN China Innovation award. It also won the 2007 Electronic Design and Application World- Nikkei Electronics China (EDAW-NEC) award for the most innovative DC-DC converter product, says the company.

Linear - High-efficiency I2C USB power manager and Li-ion charger

An autonomous I2C controlled, high-EFFICIENCY POWER manager, ideal diode controller and Li-Ion/Polymer battery charger has been unveiled by Linear Technology - for portable USB powered devices such as media players, digital cameras, PDAs, PNDs and smart phones.

Parameters including input current limit, charge current, termination current, and float voltage can be programmed via I2C. The I2C port also allows the user to read back system status information. The LTC4099’s switching PowerPath topology seamlessly manages power flow between a wall adapter or USB port and the device’s battery while preferentially providing power to the system load.

For automotive, Firewire, or other high-voltage applications, the device provides Bat-Track control of a Linear Technology companion switching regulator, maximizing battery charger efficiency and minimizing power dissipation. With companion chip input voltages ranging up to 38V (60V transients), the LTC4099 provides a seamless transition between USB and higher voltage power sources.

The LTC4099 prevents damage caused by accidental application of high voltage on the USB input with an overvoltage protection (OVP) circuit – protection up to 68V requires only an external NFET/RESISTOR combination. The LTC4099’s 'instant-ON' operation ensures system load power at plug-in even with a dead battery. Its onboard ideal diode guarantees that ample power is always available to VOUT even if there is insufficient power at the LTC4099’s two input pins. The device’s ideal diode controller can be used to drive the gate of an optional PFET, reducing the impedance between the load and the battery to 30mOhm or less.

The LTC4099’s full-featured single-cell Li-Ion/Polymer battery charger allows the load current to exceed the current drawn from the USB port while conforming to USB load specifications. For fast charging, the IC’s switching input stage converts nearly all of the 2.5W available from the USB port to current, enabling up to 600mA charge current or 700mA system load current from a 500mA limited USB port.

There is also 1.5A charge current available when wall powered. For improved safety margin, an integrated over-temperature battery conditioning circuit can optionally reduce the battery voltage in case both high battery temperature and high battery voltage occur simultaneously. Further, the charger includes thermal limiting, automatic recharge, stand-alone operation with automatic charge termination and fixed duration safety timer, low voltage trickle charging, bad battery cell detection and a thermistor input for temperature-qualified charging. An additional feature of the LTC4099 is a suspend LDO that prevents battery drain when a device is connected to a suspended USB port.The LTC4099 is housed in an ultra-thin (0.55mm) 20-pin 3mm x 4mm QFN package and is 'guaranteed' for operation from -40C to 85C, says the company.

AnalogicTech - High-voltage step-down controller maximizes adapter flexibility

A single-output, step-down controller capable of providing high EFFICIENCY POWER conversion for lower cost 12V adapters, the AAT1185, has been introduced by AnalogicTech.

Fabricated in the company's innovative Modular BCD process, the controller maximizes design versatility by offering both high and low-side pins to drive a wide variety of external N-Channel MOSFETs. Moreover, by supporting both fully synchronous and non-synchronous operation, the device allows designers to develop solutions for such disparate applications as WIRELESS LANs, DSL and cable modems, notebook computers and set-top boxes with a broad range of performance and power efficiency levels.

Given the diversity of 12V adapter applications today, designers need a high degree of flexibility to optimize the solution for their particular system. By providing low- and high-side pins to drive external MOSFETs instead of embedding the MOSFETs directly into the IC, the AAT1185 controller gives designers the option of building lower-cost, non-synchronous solutions using a Schottky diode on the load side switch or building high efficiency synchronous solutions using any of a wide array of power MOSFETs. The AAT1185 single output step-down controller supports a wide 6V to 24V input range. Output voltage is adjustable from 0.8 to 5.5V. Output current ranges from <1a>

The controller provides high- and low-side pins to drive external N-Channel power MOSFETs. Both drive pins are compatible with a wide range of external MOSFETs allowing designers to use the AAT1185 to develop control solutions for both low power and high power configurations.

The AAT1185's constant frequency voltage mode control allows designers to optimize performance across the entire output voltage and load range. A high 490kHz switching frequency helps designers keep external component size small and efficiency high by supporting the use of a wide range of L/C filtering components. External compensation allows the designer to optimize transient response. Shutdown current is <>

To ensure device integrity, the AAT1185 features internal soft start, programmable over-current and over-temperature protection circuits. Qualified across the -40C to +85C temperature range, the AAT1185 is available in a low cost, Pb-free, 14-pin TSOPJW package, says the company.

National Semi - Six new PowerWise energy-efficient subsystem reference designs

Six new POWERWise reference designs, from National Semiconductor, have been introduced to empower design engineers to speed through the design process, delivering products that consume less power, extend battery life and generate less heat. PowerWise reference designs combine energy-efficient devices and arrange them in a system to actively lower power consumption and reduce heat dissipation, says the company.

Each proven PowerWise reference file kit includes applicable design schematic, bill of materials (BOM), board layout, firmware, design documentation and field-programmable gate array (FPGA) source code in synthesizable Verilog or VHDL. The designs address a wide range of applications including portable, lighting, solar, industrial, medical, communications infrastructure, and test and measurement.

Solar-powered lead-acid battery charger - Engineers can increase the EFFICIENCY of harvesting solar power from photovoltaic cells with this reference design that efficiently converts sunlight into a charge current for lead acid batteries. The design also compensates for variations in temperature and the amount of sunlight, maintaining the most efficient conversion throughout changing conditions. The two-stage design monitors the solar panel voltages using a SEPIC design that provides the output voltage and tracks the input solar panel voltage over temperature, while the second stage takes the output of the first stage and boosts the input voltage.

High-efficiency portable music player dock - Featuring PowerWise power CONVERTERS, battery charging circuitry, audio drivers and display interface circuits, this reference design lets engineers initiate a power-saving mode when the portable media player (PMP) is unplugged from the wall power, automatically reducing the maximum brightness of the display as well as the output power of the audio drivers.

CCFL to LED conversion power supply - This reference design replaces backlight cold-cathode fluorescent (CCFL) tubes with strings of light-emitting diodes (LEDs) for lower power consumption, better durability, smaller size and brighter light that is more easily custom tailored to compensate for changes in ambient light. Using a 3-channel, constant-current LED driver with two strings of six series-connected LEDs, the design configures the LED driver as a boost converter to generate 21V to 27V output voltage with a 12V power source. The design also includes a circuit utilizing a photodiode to make the brightness of the display proportional to ambient light. This improves the display’s readability under all lighting conditions.

Ambient light adaptive LED driver - This reference design automatically adjusts display brightness for changing ambient light conditions to provide a more viewable display with better contrast. The pulse-width modulation (PWM) dimming technique of National’s LED driver dims or brightens the display backlight in response to ambient light condition. This increases battery life and improves the visibility of the display under different viewing conditions. A photodiode circuit measures ambient light and provides a signal for dimming the LEDs.

High-performance SerDes module with easy FPGA interface and cable detect - National collaborated with Avnet to develop a comprehensive reference design that implements high-speed, power-saving serial data interfacing for low-cost Xilinx Spartan-3 field-programmable gate arrays (FPGAs). National’s FPGA-Link SerDes combines high-speed data transfer flexibility with features such as automatic power down on loss of cable or input signal. The included FPGA firmware monitors this cable/signal loss indicator from the SerDes to turn off unnecessary system logic and other external components for a significant savings in total power.

Load-detecting power supply - To help reduce wasted energy from inefficient AC/DC wall adapters that continue to run even without a load, this reference design uses switched-mode power supply (SMPS) technology in place of linear regulators to drastically improve conversion efficiency. Additional circuitry 'wakes up' the power supply only when a load is applied, reducing losses to just tens of milliwatts, says the company.