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Vishay’s TR8 MicroTan™ Tantalum ChipCapacitor Named as Winner of EDN China’s Annual InnovationAward In Passive Component, Connector, and Sensor Category - The capacitor provides ultra-low ESR values of0.8 (at 100 kHz and 47 µF) in the 0805 case size,and an industry-low 1.5 in the 0603 case size.

SMSC Announces New High-Accuracy, Low-Cost Temperature Sensors - - SMSC Announces New High-Accuracy, Low-Cost Temperature Sensors HAUPPAUGE, NY – December 3, 2008 -SMSC (Nasdaq: SMSC), a leading semiconductor company providing innovative system solutions spanning analog, digital and mixed-signal technologies, today announced two new families of high-accuracy,...

MAX17101 - Dual, Quick-PWM™ Step-Down Controller Provides a Complete Solution for Notebook Power Supplies - The MAX17101 is a dual, Quick-PWM™ step-down controller for generating 5V/3.3V supplies in battery-powered systems. This highly integrated device saves space while generating multiple supplies.

Fairchild Semiconductor's 300mA Low VIN LDO Offers Higher Efficiency in Less Space for Digital Applications - Fairchild Semiconductor (NYSE: FCS) offers designers of energy-sensitive systems a 300mA low-dropout (LDO) solution balancing efficiency, transient response, and footprint size.

Video and Imaging THS8136 Triple 10-Bit 180-MSPS Graphics and Video DAC - The THS8136 is a general-purpose triple high-speed digital-to-analog (D/A) converter optimized for use in video/graphics applications. The device operates from 3.3-V analog and 1.8-V digital supplies with D/A converter performance assured at sampling rates up to 180 MHz. The THS8136 consists of three 10-bit D/A converters and...

MAX9791, MAX9792 - Industry's First, Windows Vista-Compliant, Class D Audio Subsystems Save Space and Power in Notebooks - The MAX9791/MAX9792 are first-to-market, Windows Vista®-compliant, Class D audio subsystems. These devices consume 36% less board space and 37% less supply current than the competition, while providing superior performance.

Fujitsu Launches SD Multi-Decoder LSI Supporting MPEG-2 & H.264 - Fujitsu Microelectronics Limited today announced the launch of multi-decoder LSI chips that support decoding of MPEG-2(1) and H.264(2) video compression formats for Standard Definition (SD) video, in particular for SD digital broadcasts in Russia, eastern Europe and China. Sample shipments of the new MB86H01 series will start from December 1, 2008.

Interface SN74LVCH16T245-EP Enhanced Product 16-Bit Dual-Supply Bus Transc., Configurable Voltage Translation, 3-State Outputs - FeaturesControl Inputs VIH/VIL Levels Are Referenced to VCCA VoltageVCC Isolation Feature – If Either VCC Input Is at GND, All Outputs Are in the High-Impedance StateOvervoltage-Tolerant Inputs/Outputs Allow Mixed-Voltage-Mode Data CommunicationsFully Configurable Dual-Rail Design Allows Each...

Power Management TPS65146 Compact LCD Bias IC for Notebook & Monitor with LDO, VCOM Buffer and Reset IC - The TPS65146 offers a very compact power supply solution designed to supply the LCD bias voltages required by TFT (Thin Film Transistor) LCD panels running from a typical 3.3 V or 5 V supply rail. The device integrates a step-up converter for VS (Source Driver voltage), a positive charge pump regulator for VGH (Gate Driver High...

[MBRF10U100CT] 100V, SCHOTTKY BARRIER TYPE DIODE - SWITCHING TYPE POWER SUPPLY APPLICATION. CONVERTER & CHOPPER APPLICATION. Features * Average Output Rectified Current : IO=10A. * Repetitive Peak Reverse Voltage : VRRM=100V. * Low Forward Voltage. * Low Reverse Current.

[MBRF20U100CT] 100V, SCHOTTKY BARRIER TYPE DIODE - SWITCHING TYPE POWER SUPPLY APPLICATION. CONVERTER & CHOPPER APPLICATION. Features * Average Output Rectified Current : IO=20A. * Repetitive Peak Reverse Voltage : VRRM=100V. * Low Forward Voltage. * Low Reverse Current.

Interface SN75LVCP412 Two Channel SATA 3Gb/s Repeater - The SN75LVCP412 is a dual channel, single lane SATA redriver and signal conditioner supporting data rates up to 3.0 Gbps. The device complies with SATA specification revision 2.6 and eSATA requirements. The SN75LVCP412 operates from a single 3.3-V supply and has 100-Ω line termination with self-biasing feature making...

Renesas Technology to Release Compact, High-Performance R2J15116FP Digital Amplifier Supporting IIS Digital Audio Signal Input - Tokyo, November 27, 2008 —— Renesas Technology Corp. today announced the development of the R2J15116FP, a compact, high-performance digital amplifier supporting IIS *1 digital audio signal input with a built-in 24-bit audio DSP.

Interface SN65HVD1792 70-V Fault-Protected RS-485 Transceiver - These devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. They are also robust to ESD events, with high levels of protection to human-body model specifications. These devices combine a differential driver...

Interface SN65HVD1793 70-V Fault-Protected Full-Duplex RS-485 Transceivers - These devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. They are also robust to ESD events, with high levels of protection to human-body model specifications. These devices combine a differential driver...

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Siliconix Releases First 20-V and 30-V N-Channel TrenchFET Gen III Power MOSFETs WithTurboFET Technology

Siliconix Releases First 20-V and 30-V N-Channel TrenchFET Gen III Power MOSFETs WithTurboFET Technology

The 20-V SiS426DN device offers the industry's lowest on-resistance times gate charge for a device with this voltage rating in the 3-mm by 3-mm PowerPAK® 1212-8 footprint. This key figure of merit (FOM) for MOSFETs in dc-to-dc converters is 76.6 m-nC at 4.5 V and 117.60 m-nC at 10 V for the SiS426DN, which features a low typical gate charge of 13.2 nC at a 4.5-V gate drive and 28 nC at a 10-V gate drive. [Read more...]
 

ADP1621: Constant-Frequency Current-Mode Step-Up DC/DC Controller

30.07.2006 21:30 - Source: Analog Devices

The ADP1621 is a fixed-frequency pulse-width modulation(PWM) current-mode step-up converter controller. TheADP1621 drives an external n-channel MOSFET to convert theinput voltage to a higher output voltage. The ADP1621 canalso be used to drive flyback, SEPIC, and forward convertertopologies, either isolated or non-isolated.

The ADP1621 eliminates the use of a current sense powerresistor by measuring the switch current across the powerMOSFET. This technique, with a maximum voltage of 30V atthe switch node, maximizes efficiency and reduces cost. Forswitch-node voltages higher than 30V or for more accuratecurrent limiting, the CS pin can be connected to a powerresistor in the source of the MOSFET. The slopecompensation is implemented by an external resistor,which allows a wide range of external components(inductors and MOSFETs), and can be chosen for variousswitching frequencies, input, and output voltages.The ADP1621 supply input voltage range is from 2.9V to5.5V. Higher input voltages are possible with the use of anNPN transistor. The power input voltage can be as low as1V. The switching frequency is set by an external resistorover a range of 100kHz to 1.5MHz, and it can besynchronized to an external clock by using the SDSN pin.The shutdown quiescent current is less than 10A. TheADP1621 has a thermal shutdown feature that shuts downthe gate driver when the junction temperature reachesabout 150°C.

The internal soft-start circuit prevents in-rush currents atstart-up. The ADP1621 is available in the 10-lead MSOPlead-free package and is specified over the -40°C to 85°C


Applications
  • APD Bias
  • Portable Electronic Equipment
  • Isolated DC/DC Converter
  • Step-Up/Step-Down DC/DC Converter
  • LED Driver for Laptop Computer and Navigation
    System LCD Backlighting

    • Original text is here