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May 04, 2015 8:03 PM ET

Semiconductors and Semiconductor Equipment

Company Overview of Allegro Microsystems, Inc.

Company Overview

Allegro Microsystems, Inc. develops, manufactures, and markets high-performance analog and mixed-signal semiconductors for automotive, appliance, lighting, consumer electronics, energy-efficient solutions, and industrial applications. It offers magnetic linear and angular position sensor integrated circuits (ICs); magnetic digital position sensor ICs, such as hall-effect latches and bipolar switches, hall-effect unipolar switches, dual element switches, and micropower switches and latches; and current sensor ICs, including integrated conductor sensor ICs, SIP package sensor ICs, integrated conductor sensor ICs, and high-side hot-swap hall effect based current monitor ICs. The company also of...

115 Northeast Cutoff

Worcester, MA 01615

United States

Founded in 1990

2,683 Employees





Key Executives for Allegro Microsystems, Inc.

Chief Executive Officer, President and Director
Age: 64
Chief Financial Officer, Principal Accounting Officer and Vice President
Age: 61
Vice President of Operations and Vice President of Quality
Age: 57
Executive Vice President, Director, Member of Nominating/Corporate Governance Committee and Member of Compensation Committee
Age: 55
Vice President of Technology Development
Age: 66
Compensation as of Fiscal Year 2014.

Allegro Microsystems, Inc. Key Developments

Allegro MicroSystems, LLC Announces New High Isolation, Linear Current Sensor ICs

Allegro MicroSystems, LLC announced two new current sensor ICs that are economical, high isolation solutions for AC or DC current sensing in industrial, commercial, and communications systems. Allegro's ACS717 and ACS718 devices have a very small package that is ideal for space constrained applications, though the widebody provides the creepage and clearance needed for high isolation. Typical applications include motor control, load detection and management, switchedmode power supplies, and overcurrent fault protection. Both devices consist of a lowoffset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic field to the Hall transducer. A proportional voltage is provided by the lowoffset, chopperstabilized BiCMOS Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope when an increasing current flows through the primary copper conduction path (from pins 1 through 4, to pins 5 through 8), which is the path used for current sensing. The internal resistance of this conductive path is 0.85 m typical, providing low power loss. The terminals of the conductive path are electrically isolated from the sensor leads (pins 10 through 15). This allows the ACS717 and ACS718 current sensor ICs to be used in highside current sense applications without the use of highside differential amplifiers or other costly isolation techniques. Both devices are offered in a small, low profile surface mount SOICW16 package (suffix MA). The devices are leadfree with 100% matte tin leadframe plating and are fully calibrated prior to shipment from the factory.

Allegro MicroSystems, LLC Introduces New Hall-Effect Speed/Direction Sensor IC with Hysteresis Detection

Allegro MicroSystems, LLC introduced a new Hall-effect speed and direction sensor IC with hysteresis detection. The A1232 is a highly sensitive, temperature stable, magnetic sensing device ideal for use in ring magnet based speed and direction systems in harsh automotive and industrial environments. It is the first device of its kind with the ability to detect when it powers up in the magnetic hysteresis band. This feature reduces angle accuracy error, which can occur when edges are missed at start-up. This new magnetic sensor IC is targeted at the automotive motor market. Key applications include: window lifts, sunroofs, sliding doors, and tail/trunk lift gates. This new device is also suitable for applications such as garage door openers and window blinds. Allegro’s A1232 includes dual Hall elements spaced 1.63 mm apart that are photolithographically aligned within 1 µm. The precise spacing of the sensing elements eliminates a major manufacturing hurdle encountered when using fine pitch ring magnets. The signals from the dual Hall elements are encoded into logic outputs representing the speed and direction of the target. Factory trimming and Allegro’s proprietary Chopper Stabilization /Dynamic Offset Cancellation techniques provide precise, symmetrical magnetic switch-points over a wide range of operating conditions. A built-in voltage regulator, short-circuit protected outputs, internal Zener clamps, reverse battery protection, and a -40°C to +150°C operating range give the A1232 the ruggedness demanded by automotive applications. The A1232LLETR-T is available in an 8-pin TSSOP (suffix LE) surface mount package.

Allegro MicroSystems, LLC Announces New Multiple-Output Regulator For Automotive LCD Displays

Allegro MicroSystems, LLC announced a new AEC-Q100 qualified, multiple-output regulator for powering automotive LCD displays. Allegro’s A8603 operates with fixed switching frequency that can be either programmed or synchronized with an external clock signal between 350 kHz and 2.25 MHz. This will minimize interference with AM and FM radio bands. An I²C™-compliant serial interface allows a system microcontroller to configure the A8603 by writing into its internal registers. A system controller can also access A8603’s status registers in case of fault conditions. The A8603 incorporates a boost stage followed by two linear regulators and two charge-pump regulators. Each output voltage can be programmed independently through the I²C™ serial interface. During power-up and shutdown, the outputs are turned on and off in preprogrammed sequences with adjustable delay. This allows the user to meet the sequencing requirements for specific LCD panels. Short circuit protection is provided for all outputs. The internal boost switch is protected against overcurrent and overvoltage. The A8603 is available in a 24-pin, 4 × 4 mm QFN package. It has an exposed thermal pad to allow operation at high ambient temperatures and is lead (Pb) free with 100% matte-tin leadframe plating.

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