EDN Product fEEd

The STPS50U100C high-efficiency power-rectifier diode suits use in the output of power supplies for adapters, desktop PCs, servers, and TV and video products. The forward-voltage drop is the primary source of power loss in power Schottky diodes in secondary rectification. The power rectifier reduces this voltage drop using a driver to a typical figure of 0.64V at 25A and 0.38V at 5A. Additional features include 200-mA maximum leakage current, 50A maximum average forward current, and 250A surge nonrepetitive forward current. Available in TO-220 and I²Pak packages, the device costs $1.50 (1000).

STMicroelectronics, www.st.com

Part of the vendor’s OptiMOS power-MOSFET portfolio, the 25V OptiMOS device suits voltage regulation in power supplies for computer servers and telecommunications/data-communications switches. The TDA21220 DrMOS device integrate the MOSFETs. The discrete devices come in SuperSO8, CanPak, and 3.3×3.3-mm S3O8 packages. The S3O8 package enables a six-phase converter design in a 1120 mm². The TDA21220 multichip package integrates two OptiMOS transistors and a driver IC. In a SuperSO8 package, a 1-mΩ 25V OptiMOS device costs $1.40 (2000). The TDA21220 DrMOS devices cost $2.17 (2000).

Infineon Technologies, www.infineon.com

Suiting synchronous dc/dc conversion, the TPCA8055-H and the TPC8055-H power MOSFETs use the vendor’s trench process in the UMOS VII-H fast-switching series. The TPCA8055-H provides a 2.2-mΩ on-state resistance, a 10V gate-to-source voltage, and a 30V V_DSS. The TPC8055-H comes in a 5×6×1.6-mm SOP-8 package, and the TPCA8005-H comes in 5×6×0.95-mm SOP-8 Advanced housing. Prices for the TPCA8055-H and the TPC8055-H power MOSFETs start at 75 cents.

Toshiba America Electronic Components, www.toshiba.com/taec

The SiC762CD DrMOS device integrates PWM-suited high- and low-side N-channel MOSFETs, a full-featured MOSFET-driver IC, and a bootstrap diode. Compliant with the vendor’s DrMOS specification for voltage regulators in servers and desktop computers, the device enables 1-MHz operating frequencies at 92% efficiency. Operating over a 3 to 27V input-voltage range, the device delivers 35A continuous output current. The integrated MOSFETs have output voltages of 0.8 to 2V and a nominal input voltage of 24V. An advanced gate-driver IC accepts a PWM input from the controller, converting it into the high- and low-side MOSFET gate-drive signals. The PWM input aims at use with controllers with tristate PWM output functions. Available in a PowerPak MLP-40 package, the SiC762CD DrMOS device costs $2.65.

Vishay Intertechnology, www.vishay.com

Adding 12 devices to the vendor’s MOSFET portfolio, the NTP641x and NTB641x 100V N-channel power MOSFETs target designs requiring voltage-overstress protection from unclamped inductive loads. Features include a 500-mJ avalanche rating, a 13-mΩ on-resistance, and a 76A current capability. Operating over a –55 to +175°C temperature range, the MOSFETs come in lead-free, ROHS-compliant TO-220, D²Pak, DPak, and IPak packages. Prices for the devices range from 92 cents to $1.90 (10,000).

On Semiconductor, www.onsemi.com

The Pocket eSATA/USB DigiDrive and the internal SATA/USB DigiDrive multiflash readers use a SATA interface aiming at forensics markets. The Pocket DigiDrive provides eSATA and USB 2.0 connections and enables read and write to 15 forms of digital media. The device reader has four slots for direct access to Compact Flash; SD; and SDHC, MMC, and memory sticks. The internal flash-memory reader/writer mounts directly into a 3.5-in.-drive-bay standard. The internal SATA/USB drive comes with upgradable firmware. Pocket eSATA/USB DigiDrive costs $64 for the regular and the read-only version; the internal SATA/USB DigiDrive costs $59.99 for both versions.

Addonics Technologies,www.addonics.com

The LED-backlit Multisync EA222WMe desktop LCD consumes 52% less power and radiates 61% less heat than the vendor’s previous generation of LCD. The display uses recycled plastics in its production and is free of hazardous materials, such as mercury, halogen, and arsenic. Using 15% less packaging and weighing 25% less than the vendor’s previous generation, the LCD provides connectivity with VGA, DVI, USB, and DisplayPort inputs. Features include a 16-to-10 wide-screen display with a white-LED backlight, 1680×1050-pixel native resolution, 30,000 dynamic-contrast ratio, and 250-cd/m² brightness. The device also includes integrated, down-firing multimedia speakers. The MultiSync EA222We costs $339, with a three-year parts and labor limited warranty.

NEC Display Solutions of America, www.necdisplay.com

The AMMC-5025 dc to 80-GHz traveling-wave amplifier suits high-speed digital-communications applications operating in the 30-kHz to 80-GHz frequency band, such as test-and-measurement equipment, radar-warning receivers, wideband communications and surveillance systems, and point-to-point radios. The device provides 8-dB small-signal gain, ±0.7-dB gain flatness, and a 10-dB input and output return loss. A gain-slope-control feature and adjustable gain control enables a dynamic range of more than 25 dB. Features include a 50Ω match on input and output, and 300V HBM ESD protection. Available in a 1.6×1-mm die, the AMMC-5025 costs $150 (1000).

Avago Technologies, www.avagotech.com

The NCS2554 four-channel video driver provides sixth-order Butterworth reconstruction filters per channel. The first set of three channels uses standard-definition filters, and a fourth channel provides an extra filter driver for driving CVBS-type video signals. Using two enable pins, the high-speed driver uses one enable pin for the triple driver and the other pin for the single driver. All channels accept dc- or ac-coupled loads at 150Ω. Additional features include a 6-dB internal fixed gain of ±0.2 and a 4.7 to 5.3V supply-voltage range. Available in a TSSOP-12 package, the NCS2554 four-channel video driver costs 29 cents.

On Semiconductor, www.onsemi.com

The 33-MHz, low-noise, rail-to-rail, single-ended-to-differential LT350 amplifier settles to 16 bits in 350 nsec. The device integrates two op amps and matched resistors, creating a differential output from a single-ended, high-impedance input. The input-and-output ADC driver has a 1.9-nV/√Hz input-referred noise density, resulting in a total 8.2-nV/√Hz output-referred noise. Operating on a 2.7 to 12V total supply, the device consumes 4.8 mA of supply current. The amplifier suits 0 to 70, –40 to +85, and –40 to +125°C commercial-, industrial-, and extended-temperature ranges, respectively. Available in lead MSOP-8 and a 3×3-mm DFN packages, the LT6350 ADC costs $2.59 (1000).

Linear Technology, www.linear.com

The pulse-density-modulation SSM2517 digital-input Class D audio amplifier suits use in handsets, portable media players, and laptop computers. The amplifier combines an audio DAC, a power amplifier, and a PDM (pulse-density-modulation) digital interface. Digitally transmitting the audio to the amplifier minimizes the effect of the GSM interference or other sources of electrically coupled noise. Claiming 90% power efficiency, the closed-loop-modulator design enables a reliable rejection of power-supply ripple. Available in a 1.5×1.5-mm, nine-ball WLCSP package, the SSM2517 audio amplifier costs 63 cents (1000).

Analog Devices, www.analog.com

Providing precision low-noise performance for portable-medical-equipment applications, the zero-drift MAX9617 rail-to-rail operational amplifier achieves a 10-µV maximum input-offset voltage and a 1-µV p-p input-voltage noise from 0.1 to 10 Hz. Operating from 1.8 to 5.5V supplies, the op amp provides a 5-nV/°C typical input-offset-voltage drift. Additional features include a 59-µA quiescent current, a 10-pA input-bias current, and a –40 to +125°C automotive temperature range. Available in an SC70-6 package, the MAX9617 rail-to-rail operational amplifier costs 85 cents (1000).

Maxim Integrated Products, www.maxim-ic.com

Available in a surface-mount packaging, the ISL8204M and ISL8206M switch-mode power supplies include a PWM controller, power MOSFETs, a power inductor, and associated discrete components. Pin-compatible with the vendor’s 10A ISL8201M module, the ISL8204 and the ISL8206M power supplies have a 4A and 6A rating, respectively. The devices enable the construction of a high-performance POL regulator using input and output capacitors, and a resistor for programming the output voltage. Claiming 95% efficiency, the modules provide a 1 to 20V input-voltage range. A resistor sets output voltage from 0.6 to 6V with ±1% accuracy. Available in lead QFN-15 packages measuring 15×15×3.5 mm, the ISL8204M and the ISL8206M switch-mode power modules cost $8.12 and $11.34 (1000), respectively.

Intersil Corp, www.intersil.com

The SC195 500-mA synchronous buck step-down regulator provides a flexible output for low-voltage point-of-load regulation and mobile-device applications. Operating from 2.9 to 5.5V inputs, the regulator provides 15 pin-programmable output voltages from 0.8 to 3.3V, covering all the typical core and I/O voltage rails with one device. Claiming 94% efficiency, the device provides fast transient response, 3.5-MHz PWM operation with an automatic power-saving feature at light loads, 38-µA quiescent current, and a 0.1-µA typical shutdown mode. Using four digitally programmable pins to set the output voltage eliminates the need for external feedback components or individual fixed output-voltage regulators for different loads, reducing space and improving reliability. Available in a 1.5×1.5×0.6-mm MLPQ package, the SC195 500-mA step-dow...Read More

Suiting medical and industrial applications, the SHP650 and the MHP650 650W ac/dc power supplies provide a single output and high power density. Two fan-cooled formats enable the option mounting the fan internally on the top or mounting the fan externally on the end of the unit. The load-dependant integral fan speed minimizes noise. Using the U channel format enables designers to use their own airflow, requiring 5.5m/sec forced airflow. The device includes a 12V dc, 6W fan supply when using the U-channel format. Additional features include an 85 to 264V input range, operation at full power from 90V ac, and a –20 to +70°C temperature range with no derating below 50°C. The SHP650 and the MHP650 ac/dc power supplies cost $179 and $281, respectively.

XP Power, www.xppower.com<