Semiconductors and Semiconductor Equipment
Company Overview of Allegro Microsystems, Inc.
Allegro Microsystems, Inc. manufactures semiconductors, discretes, LEDs, switch mode power supplies, and power and hall-effect sensor integrated circuits (ICs). It offers analog and mixed-signal semiconductors; magnetic linear and angular position sensor ICs; magnetic digital position sensor ICs, which include hall-effect latches, unipolar and bipolar switches, brushless DC motor drivers, dual element switches, and micro power switches and latches; current sensor ICs, such as integrated conductor sensors, SIP package sensors, and current monitors; and magnetic speed sensor ICs, which include camshaft, crankshaft, transmission, and wheel speed. It provides motor driver and interface ICs, such...
115 Northeast Cutoff
Worcester, MA 01615
Founded in 1990
Key Executives for Allegro Microsystems, Inc.
Vice President of Operations and Vice President of Quality
Vice President of Technology Development
Compensation as of Fiscal Year 2013.
Allegro Microsystems, Inc. Key Developments
Allegro MicroSystems, LLC Introduces New User-Configurable Switch Mode Power Supplies
Dec 6 13
Allegro MicroSystems, LLC announced the release of three new switch mode power supplies. The C, HWB and SWF series have been designed with a user-configurability feature to prevent customers from replacing the entire set of power supplies making it much easier to change specifications. All three series are targeted at the telecommunications and medical markets. These new power supplies are offered by Allegro and manufactured and developed by Sanken Electric Co. Ltd. in Japan. The C Series power supplies save design and production time and cost by allowing end-of-line selection of multiple output voltages to match alternative application circuit requirements, while using the same power supply base unit. DC voltage output modules are slot-mounted inside the base units to provide various combinations of single, dual, or parallel output voltages. The HWB Series employs proprietary Soft-switched, multi-resonant zero-cross (SMZ) type resonant-mode circuits to achieve large noise reduction in the converter unit. Moreover, this is a switching power supply which has realized ultra-low noise (ripple voltage, conducted emission, and noise electric field strength) like a dropper power supply, employing a proprietary resonant mode hybrid IC and transformer. The SWF Series are compact, wide ranging power supplies, providing peak power capability that supports twice the rated output, making them ideal for motorized applications. They offer low noise and high efficiency by current resonant circuitry.
Allegro Microsystems, LLC Introduces New Product Evaluation Kit for A4915 Three-Phase Mosfet Controller IC
Dec 3 13
Allegro MicroSystems, LLC introduced a new product evaluation kit for their A4915 three-phase MOSFET controller IC to assist customers during the design process. With on-chip hall commutation and a unique SPEED control input, spinning a motor with the company's A4915 couldn’t be easier. The SPEED input takes an analog voltage and generates pulse width modulated (PWM) output with variable duty cycle. This innovative control interface combined with on-chip hall commutation makes it possible to efficiently control a BLDC motor with little or no micro processing power. The company's solution reduces PCB space by 75% over existing competitive solutions on the market. The A4915 evaluation kit is fully compliant to 50 V and includes everything needed to spin a motor - just provide a voltage supply and a motor and the customer will be able to see just how simple the A4915 can be to control a BLDC motor with a simple analog voltage or direct PWM. Six all N-channel power MOSFETs are mounted on the evaluation kit and can supply 30 A peak and 20 A nominal run current at room temperature. If larger loads are needed the A4915 has jumpers that disable the onboard bridge and provide connections to add an external bridge. Another feature on the evaluation board, which makes operation and evaluation simple, is the onboard 5 V regulator which creates the secondary supply for logic inputs. This new development kit is targeted at both the industrial and consumer markets with end applications to include power tools, lawn and garden equipment, pumps, ticketing and ATM machines and household appliances. The A4915 development kit is available for both the 28-pin TSSOP with an exposed thermal pad (suffix LP) and a 28-contact 5 × 5 mm QFN with an exposed thermal pad (suffix ET).
Allegro MicroSystems, LLC Adds an Enhanced Accuracy Current Sensor IC to Existing Portfolio
Oct 29 13
Allegro MicroSystems, LLC announced a new thermally enhanced, fully integrated, hall-effect-based, high precision linear current sensor IC to their existing portfolio. Allegro’s ACS770 device consists of a precision, low-offset linear Hall circuit with a copper conduction path located near the die. Applied current flowing through this copper conduction path generates a magnetic field which the Hall IC converts into a proportional voltage. This new device is targeted at the automotive, industrial and renewable energy markets. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional output voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed and calibrated for accuracy at the factory. Proprietary digital temperature compensation technology greatly improves the IC’s accuracy and temperature stability without influencing the high-bandwidth operation of the analog output. High level immunity to the current conductor dV/dt and stray electric fields, offered by Allegro proprietary integrated shield technology for low output voltage ripple and low offset drift in high-side, high voltage applications. The output of the device has a positive slope (>VCC /2) when an increasing current flows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used for current sampling. The internal resistance of this conductive path is 100 µO typical, providing low power loss. The thickness of the copper conductor allows survival of the device at high overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads (pins 1 through 3). This allows the ACS770 family of sensor ICs to be used in applications requiring electrical isolation without the use of optoisolators or other costly isolation techniques. The ACS770 family is lead (Pb) free. All leads are plated with 100% matte tin, and there is no lead inside the package. The heavy gauge lead frame is made of oxygen-free copper. The ACS770 is available in a 5-pin package (suffix CB).
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