November 22, 2017 4:30 AM ET

Semiconductors and Semiconductor Equipment

Company Overview of Allegro MicroSystems, LLC

Company Overview

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, micropower LED driver ICs, motor driver and interface ICs, regulators and lighting solutions, and analog IC products; power management ICs to supply power to microprocessor/DSP plus sensors, transceivers, and other loads; dual-die programmable linear hall IC with advanced diagnostics for safety-critical applications; and ...

115 Northeast Cutoff

Worcester, MA 01615

United States

Founded in 1990

2,683 Employees

Phone:

508-854-5224

Fax:

508-853-2431

Key Executives for Allegro MicroSystems, LLC

President and Chief Operating Officer
Age: 56
Chief Financial Officer, Principal Accounting Officer and Vice President
Age: 64
Executive Vice President and Director
Age: 58
Vice President of Technology Development
Age: 69
Compensation as of Fiscal Year 2017.

Allegro MicroSystems, LLC Key Developments

Allegro MicroSystems, LLC Announces New Automotive, Half-Bridge MOSFET Driver ICs

Allegro MicroSystems, LLC announced two new N-channel power MOSFET driver ICs capable of controlling MOSFETs connected in a half-bridge arrangement. Allegro’s A4926 and A4927 are specifically designed for automotive applications with high-power inductive loads, such as, DC Pumps (Braking, Oil, Water, and Fuel), HVAC (Blower Fan), solenoids, and actuators. These devices are intended for automotive systems that must meet ASIL requirements. In common with other Allegro A 2 SIL™ products, this device incorporates features to complement proper system design, allowing users to achieve the required ASIL level. A unique charge pump regulator provides full gate drive for battery voltages down to 5.5 V for most applications. A bootstrap capacitor, with optional bootstrap management, is used to provide the above-battery supply voltage required for N-channel MOSFETs. The half-bridge can be controlled by independent logic-level inputs or through the SPI-compatible serial interface. The external power MOSFETs are protected from shoot-through by a programmable dead time. Integrated diagnostics provide indication of multiple internal faults, system faults, and power bridge faults, and can be configured to protect the power MOSFETs under most short-circuit conditions. In addition to providing full access to the bridge control, the serial interface is also used to alter programmable settings such as dead time, VDS threshold, gate drive current, and fault blank time. Detailed diagnostic information can be read through the serial interface. In addition, the A4927 includes an integrated low side current amplifier with programmable gain and offset. The A4926 is supplied in a 20-lead eTSSOP (suffix LP). This package is lead (Pb) free, with 100% matte-tin leadframe plating (suffix –T). The A4927 is supplied in a 24-lead eTSSOP (suffix LP). This package is lead (Pb) free, with 100% matte-tin leadframe plating (suffix –T).

Allegro MicroSystems Introduces Optimized Hall-Effect IC and Rare-Earth Pellet Combination

Allegro MicroSystems, LLC has introduced a new optimized Hall-effect integrated circuit (IC) and rare-earth pellet combination. The small package can be easily assembled and used in conjunction with a wide variety of gear-tooth-sensing applications. This new IC employs patented algorithms for the special operational requirements of automotive transmission and recreational vehicle applications. The ATS699 is particularly adept at handling vibration without sacrificing maximum air gap capability or creating any erroneous "direction" pulses. Even higher angular vibration caused by engine cranking is completely rejected by the device. The advanced vibration detection algorithm will systematically calibrate the sensor IC on the initial teeth of true target rotation and not on vibration, always guaranteeing an accurate signal in running mode.

Allegro MicroSystems, LLC Announces Micropower LED Driver with Integrated Hall-Effect Switch

Allegro MicroSystems, LLC announced the release of a new micropower LED driver IC that features an integrated Hall-effect switch. The APS13568 enables compact, elegant, reliable, and fault-tolerant LED lighting with minimal electrical engineering and low component-count and cost. A single silicon chip integrates: a micropower regulator, a Hall plate, a small-signal amplifier, chopper stabilization, a Schmitt trigger, open drain Hall-Effect switch output, output polarity selection, and an LED driver with soft on/off and short circuit and thermal protection with automatic recovery. The integrated solid-state Hall-effect switch supports silent, sealed, contactless activation and offers a significant upgrade from failure-prone mechanical switches and provides very low standby current (< 50 µA). The LED driver features low-noise, adjustable, linear drive of up to 150mA into one or more LEDs. An optional external capacitor programs the turn-on/turn-off rate, adding an elegant “theater” effect. It is controlled by the Hall-effect switch and turns on and off in response to a magnet. The Hall-effect switch is omnipolar (responsive to both North and South magnetic poles) and highly sensitive (BOP = 40G) to support a wide range of mechanical configurations and enclosures with various air-gaps and degrees of mechanical misalignment. The AP13568 features selectable output polarity as well as an open drain output for connecting to additional external circuitry. This new device complements Allegro Microsystem’s existing portfolios of LED drivers and Hall-effect switches by adding an external output and micropower operation (<50 µA). It is targeted at consumer electronics, white goods, boats, RVs, motorcycles, and interior and auxiliary automotive lighting applications such as glove boxes, center consoles, vanity mirrors, trunks/boots, truck beds, etc. The on-board micropower regulator permits operation with supply voltages of 7 V to 24 V while providing very low average supply current when the output is disabled. Reliability and EMC performance are enhanced with Zener clamps, output short-circuit protection, thermal shutdown, and reverse-battery protection. Superior Hall switch performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature drift, and thermal stress. The device is available in two versions: the “K” option is an automotive-grade (AEC-Q100) device that operates from -40 °C to +125 °C; the “E” option is for industrial and consumer applications that operate from -40 °C to 85 °C. Both versions feature a RoHS-compliant, thermally enhanced SOIC-8 surface-mount package (designator “LJ”).

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