DC Motor Pre-driver Saves Power, Reduces Damage

March 27, 2008 11:31 am | Product Releases | Comments

Targeting office automation, telecommunications, consumer and industrial applications, the Allegro A4930 single-phase brushless DC motor pre-driver provides outputs that can drive N-Channel MOSFET H-Bridges with voltage ranges from 8V to 36V. Motor speed is regulated by either PWM or external analog voltage with programmable minimum speed and maximum motor current. Synchronous rectification is employed in the PWM off-cycle to reduce power dissipation, and startup current can be ramped up for reduced supply current surges and lock detection along with auto restart functions to reduce damage due to motor overheating.


Audio Processor Chip Integrates Bluetooth for Mobile Phone Applications

March 27, 2008 10:06 am | Product Releases | Comments

CSR’s MusiCore1 single-chip stereo audio processor with Bluetooth overcomes the limitations of a phone CPU in handling both audio and voice processing. It supports decoding of all mainstream music file formats including MP3, AAC, AAC+, WMA and SBC, and its DSP architecture reduces the power required to process audio files: 5.25 mW for an MP3 file, compared to


DSCs Integrate 16-bit Audio DAC

March 27, 2008 8:33 am | Microchip Technology Inc. | Product Releases | Comments

Targeting embedded applications requiring audio functionality, 28-pin and 44-pin dsPIC 16-bit DSCs incorporate a dual-channel, 100ksps, 16-bit audio DAC module as well as 16 kB RAM (2 Kbytes of dual-port RAM) with 64 kB and 128 kB flash optional in the dsPIC33 model. Features of the DSP-capable device include two analog comparators, selectable 10-bit or 12-bit ADC, and a


Adjustable TFT Accepts Wide Input

March 27, 2008 8:00 am | Product Releases | Comments

Offering fully adjustable outputs, the dual-channel LTC3524 BIAS and white-LED driver can generate up to 25mA at 6V for the AVDD channel, and up to 2mA at 20V and -20V for the respective VGH and VGL bias requirements with controlled power-up/power-down sequencing. Able to operate at up to 90 percent with voltages from 2.5V to 6V, the 4mm2 QFN-packaged synchronous rectification device can power up to 10 white LEDs (5 per channel) while offering a dimming ration of up to 200:1.


Voltage Feedback Amplifier Boasts Low Quiescent Current

March 26, 2008 10:13 am | Product Releases | Comments

 portable instrumentation, active filters and analog to digital converter (ADC) buffers


Zener Diode Assemblies Shield Automotive Peripherals

March 26, 2008 6:06 am | Product Releases | Comments

Created to help protect consumer infortainment devices that require in-vehicle charging, a pair of 2.3A polymer-enhanced Zener diode assemblies from Tyco Electronics  include a resistively non-linear, polymer positive temperature coefficient (PPTC) layer that responds to either diode heating or overcurrent events. Features include a max input of 16VDC, a resistance of 0.04O, and a power dissipation of 0.7W.


RF Dongle Reference Design Uses Single RFIC

March 25, 2008 5:25 am | Product Releases | Comments

Providing an air data rate of up to 2 Mbps, a single-chip USB dongle reference design based on the nRF24LU1 RFIC with integrated RF synthesizer and PLL is intended for use in applications such as PC peripherals, remote devices, and sports accessories. The design integrates the RF chip, PCB antenna, 16 MHz crystal, and required passives in a 12 mm × 32 mm form factor that is FCC, ETSI, and USB compliant.


40V Synchronous Rectifier Enables High Efficiency In Switching Designs

March 24, 2008 10:24 am | Fairchild Semiconductor | Product Releases | Comments

Fairchild Semiconductor's 40V breakdown DC/DC synchronous rectifier for power supplies such as DC-DC brick modules and servers features desirable RDS(ON) and total gate charge (QG), and provides 20 percent lower Figure of Merit (FOM) compared to other 40V MOSFET solutions, according to the company. It comes in an industry standard and green


Analog Front End Enhances Ultrasound System Performance

March 24, 2008 9:47 am | Product Releases | Comments

Presenting a complete analog signal chain solution designed for portable ultrasound systems, Texas Instruments' AFE5805 integrated analog front end (AFE) delivers as much as a 50 percent space savings with up to 20 percent lower power consumption and 40 percent less noise than existing integrated solutions. Presented as the smallest device of its type and the first in the AFE58xx family of devices, the AFE reduces component count to decrease power consumption by up to 20 percent and offers 40 percent less noise than similar devices


Battery Authentication ICs Provide Device Security

March 21, 2008 5:53 am | Product Releases | Comments

Intersil introduced flexible battery authentication ICs for cell phones. The ISL9206 and ISL9206A are incorporate the company's FlexiHash+ engine. It provides high levels of security using a basic challenge/response scheme based on 32-bit challenge code and 8-bit response code. The engine employs


Op Amp Combines High Voltage and High Accuracy

March 19, 2008 12:31 pm | Product Releases | Comments

Texas Instruments introduced a precision power operational amplifier (op amp) which operates on supplies up to 100V and provides a high output current of ±50mA with a 150 mA short circuit limit. The OPA454 is unity-gain stable and can track fast moving signals since it has a slew rate of 10V/µs and gain-bandwidth product of 2.5 MHz. It features a single or dual supply of ±4V (8V) to±50V (100V).


Linear Regulator Cuts MSP430 System Standby Power In Half

March 19, 2008 11:17 am | Product Releases | Comments

Consuming what is presented as the lowest quiescent current in the industry at 500nA, the Texas Instruments' TPS780xx LDO also has a voltage select pin for designers to dynamically shift to a lower voltage level in a MSP430 microcontroller-based battery-powered design when the microprocessor is in sleep mode to cut power by as much as half. Stable with any output capacitor greater than 0.1µF


Miniature Signal Conditioning IC Enhances Optical Sensors' Proximity and Object Detection

March 19, 2008 7:55 am | Product Releases | Comments

Avago Technologies today announced a miniature single-chip signal conditioning IC that is said to enhance the performance and robustness of optical sensors used for proximity or object detection in consumer and industrial applications. When used with optical proximity sensors, the APDS-9700 signal conditioning IC provides


IGBTs Exhibit High Power Dissipation in Solar Inverter Apps

March 18, 2008 11:09 am | International Rectifier | Product Releases | Comments

Using the latest-generation field-stop trench technology to reduce conduction and switching losses, the IRGB40xxDPbF family of 600V IGBTs from International Rectifier reduces power dissipation by up to 30percent in UPS and solar inverter applications of up to 3 kW. The devices are optimized for switching at 20 kHz with a collector-to-emitter saturation voltage from 1.95V to 2.20V and currents from 4A to 48A with a internal soft-recovery diodes


Precision Amplifier Offers 20 fA Guaranteed Input Bias Current

March 18, 2008 10:58 am | Product Releases | Comments

National Semiconductor introduced the LMP7721 precision amplifier 20 fA guaranteed input bias current at room temperature and over the extended temperature range of -40°C to 125°C. According to the company, the device yields maximum system sensitivity and accuracy from photodiode and high-impedance sensors and is suited for improving sensitivity and accuracy in battery operated portable applications



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