Semiconductors and Semiconductor Equipment
Company Overview of Allegro MicroSystems, LLC
Allegro MicroSystems, LLC develops, manufactures, and markets semiconductors. It offers various integrated circuit (IC) solutions that focus on motor control, regulation, and magnetic field sensing applications. The company’s products include current sensor ICs, magnetic digital position sensor ICs, magnetic linear and angular position sensor ICs, magnetic speed sensor ICs, motor driver and interface ICs, regulators and lighting solutions, and analog IC products; and power management ICs to supply power to microprocessor/DSP plus sensors, transceivers, and other loads. Its products are used in automotive, lighting, consumer electronic, energy-efficient solution, appliance, office automation,...
115 Northeast Cutoff
Worcester, MA 01615
Founded in 1990
Key Executives for Allegro MicroSystems, LLC
Chief Executive Officer, President and Director
Chief Financial Officer, Principal Accounting Officer and Vice President
Vice President of Operations and Vice President of Quality
Executive Vice President, Director, Member of Nominating/Corporate Governance Committee and Member of Compensation Committee
Vice President of Technology Development
Compensation as of Fiscal Year 2015.
Allegro MicroSystems, LLC Key Developments
Allegro Microsystems, LLC Announces New Power Management IC
Nov 17 15
Allegro MicroSystems, LLC announced a new power management IC that uses a buck or buck-boost pre-regulator to efficiently convert automotive battery voltages into a tightly regulated intermediate voltage, complete with control, diagnostics, and protections. The unique buck-boost design of Allegro’s A4409, allows sub 5 V input voltage operation to accommodate the latest automotive idle-stop requirements. The output of the main switching regulator supplies two 5 V LDOs, one at 300 mA and the other at 200 mA. Designed to supply power to microprocessor/DSP plus sensors, transceivers, and other loads, the A4409 is ideal for Automotive Control Units. The Enable Input to the A4409 is compatible to a high-voltage battery level (ENBAT). Diagnostic outputs from the device include a power-on-reset output (NPOR). Long-term system reliability is increased by the use of dual internal bandgap voltage references, one for regulation and one for fault-checking. The A4409 also contains a window watchdog timer that can be programmed to accept a wide range of clock frequencies (WDADJ). The watchdog timer has a fixed 30 ms activation delay to accommodate processor startup, and has an enable/disable pin (active low, WDENn) to facilitate initial factory programming or field re-flash programming. Additional protection features include foldback overcurrent protection for the LDO outputs. Also the main he switching regulator includes pulse-by-pulse current limit, hiccup mode short-circuit protection, LX short-circuit protection, and missing asynchronous diode protection, and the IC has an overtemperature thermal shutdown. The A4409 is supplied in a low profile (1.2 mm maximum height), 20-lead eTSSOP package (suffix “LP”) with exposed thermal pad.
Allegro Microsystems, LLC Announces Unique New 2D Speed and Direction Sensor IC Using Vertical and Planar Hall Elements
Nov 3 15
Allegro MicroSystems, LLC announced the release of a unique dual-channel Hall-effect latch featuring two-dimensional (2D) sensing via a combination of vertical Hall and planar Hall elements. The quadrature outputs of the A1262 allow rotation direction and position to be determined, such as when sensing a rotating ring-magnet target. The unique 2D operation of the combined planar and vertical Hall elements allows the end user to achieve an ideal 90° of phase separation between channels that is inherently independent of ring magnet geometry (pole pitch). This enables system designers to achieve new mechanical configurations not feasible with traditional planar Hall sensors, including replacing through-hole SIP devices with tiny surface-mount SOT23 ICs, saving space and cost. This new device is targeted at applications in the automotive, industrial, and consumer markets such as motor commutation and rotary position sensing, e.g., window blinds, garage door openers, scroll wheels, power window lifts, sunroof/sliding door/trunk/tailgate motors, white goods, etc. Allegro’s A1262 is available in two options that allow flexibility in end-system magnetic design. Both options feature a planar Hall element that is sensitive to magnetic fields perpendicular to the face of the package (Z). The other channel comes from a vertical Hall element that is sensitive in either the X or Y direction. The Y option features a vertical Hall plate that is sensitive to magnetic fields parallel with the face of the package across the leaded edges of the package. The X option features a vertical Hall plate that is sensitive to magnetic fields parallel with the face of the package across the leadless edges of the package, resulting in lower total effective air gap than can be achieved with competing solutions. On a single silicon chip, the device includes: two Hall plates (one planar and one vertical), a multiplexer, a small-signal amplifier, chopper stabilization, a Schmitt trigger, and two short-circuit-protected NMOS output transistors to sink up to 20 mA. The on-board regulator permits operation with supply voltages of 3 to 24 V and adds EMC robustness such as greater protection against high voltage transient events. The A1262 is qualified to AEC-Q100 standards and includes Zener clamps, output short-circuit protection, and reverse-battery protection. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The device is highly sensitive (BOP = 17 G typical) and its magnetic operating characteristics are specified across the operating voltage and temperature ranges. Package designator “LH5” is a modified SOT23-W surface-mount package, magnetically optimized for a variety of orientations. This package is lead (Pb) free, with 100% matte-tin leadframe plating.
Allegro MicroSystems, LLC Introduces New Two-Wire Hall-Effect Latch with Increased Magnetic Sensitivity
Sep 9 15
Allegro MicroSystems, LLC introduced a new two-wire Hall-effect latch with increased magnetic sensitivity. The A1245 latch is produced on the AllegroTM advanced BiCMOS wafer fabrication process. It implements Allegro's patented high frequency, 4-phase, chopper-stabilization techniques to achieve magnetic stability over its full operating temperature range, 40 to +150ºC. A Hall-effect latch will be in the high output current state in the presence of a magnetic south polarity field of sufficient magnitude and will remain in this state until a sufficient north polarity field is present. Two-wire latches are particularly advantageous in cost sensitive applications because they require one less wire for operation versus the more traditional open-collector output switches. Additionally, the system designer inherently gains diagnostics because there is always output current flowing, which should be in either of two narrow ranges. Any current level not within these ranges indicates a fault condition. The A1245 is designed for speed and position sensing of ring-magnets or other moving/rotating assemblies in applications that are safety-critical and/or have long wiring harnesses. Examples include automotive applications such as internal mode switch transmissions and transmission range switch/manual level position sensor shift selectors electronic parking brake motors electronic power steering and sunroof, tailgate and other motors industrial/consumer applications include white goods, industrial/factory automation, and automatic doors. Overall ruggedness, including ISO 76372 performance, is achieved with an integrated voltage regulator, clamping diodes, ESD protection, and reverse-battery protection. The device is offered in two package styles. The LH is a SOT23W style, miniature low profile package for surface-mount applications. The UA is 3-pin ultra-mini single inline packages for through-hole mounting. Both packages are RoHS compliant with 100% matte tin leadframe plating. The A1245 is offered with a choice of current levels corresponding to the switch's off or low state, ICC(L).
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