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. Its products are used in automotive, lighting, consumer electronic, energy-efficient solution, appliance, office automation, and industrial applications. The company offers its products primarily to OEMs through a direct sales force...
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 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).
Allegro MicroSystems Announces New Wide Input Voltage, Synchronous Buck Regulator IC's for USB Charging
Aug 11 15
Allegro MicroSystems, LLC expands its automotive regulator portfolio by adding two devices targeted specifically at USB power applications. Allegro’s A8652 and A8653 devices are high output current synchronous buck regulator ICs that provide tight load regulation over a wiring harness without the need for remote sense lines. This remote load regulation is achieved with an integrated open-loop correction scheme that, given a known wiring harness resistance, adjusts the output voltage based on the measured load current and a user programmable gain, achieving ±2% accuracy at 500 mV of correction. The Remote Load Regulation control includes a 115% regulated voltage clamp in conjunction with a dynamic over voltage protection with OVP threshold changing with the correction voltage. The A8652/53 devices include a user configurable load side current limit to fold back the output voltage during an output over current condition. The devices regulate nominal input voltages from 4.0 V to 36 V and remain operational when VIN drops as low as 2.6 V. When the input voltage approaches the output voltage, the duty cycle is maximized to maintain the output voltage. Key features include externally set soft-start time, external compensation network for power train optimization, an EN input to enable VOUT, a SYNC/FSET input to synchronize or set the PWM switching frequency, and a PowerOK output to indicate when VOUT is within regulation. Protection features include VIN under-voltage-lockout, cycle-by-cycle current limit, hiccup mode short-circuit protection, dynamic over-voltage protection, and thermal shutdown. Both devices provide open-circuited, adjacent pin short-circuit, and short-to-ground protection at every pin to satisfy the most demanding automotive and non-automotive applications. The A8652/53 devices are available in a 16-pin eTSSOP package with exposed pad for enhanced thermal dissipation. The package is lead (Pb) free, with 100% matte tin lead frame plating. The maximum junction temperature (TJ (max)) is 150°C.
Allegro Microsystems, LLC Introduces New Dual Die, Hall-Effect Angle Sensor ICs for Motor Position Applications
Jul 14 15
Allegro MicroSystems, LLC introduced a new family of contactless, Hall-effect based magnetic sensor ICs for high speed motor position sensing applications. Allegro’s dual-die A1331 and A1334 angle sensor ICs are based on vertical Hall-effect technology. The A1331 and A1334 devices, with their system-on-chip (SoC) architectures, provide fast output refresh rates and low signal path latency to support a wide variety of demanding automotive and industrial applications. Both devices are ideal for automotive applications such as electronic power steering (EPS) or power braking motor position sensing, transmission actuator position sensing, throttle/pedal position detection, and other systems that require accurate measurement of angular or rotary position. The dual die A1331 and A1334 ICs are offered in a TSSOP-24 package that contains two individually sawn, electrically isolated silicon ICs. These dual die ICs are ideal for use in safety critical applications that require the use of redundant sensor ICs, especially in ASIL compliant systems. The A1331 and A1334, with their onboard digital signal processing functions and EEPROM for factory and customer programmability, are designed specifically for on-axis/end-of-shaft angle sensing applications that require ultra-fast output refresh rates and low signal path latency. These ICs offer a 4-wire 10 MHz SPI interface with a 25 µs output refresh rate and a nominal signal path latency of only 60 µs. In addition, the ICs can operate directly off a vehicle battery, supporting a wide 4.5 V to 14.5 V supply voltage range, while consuming just 10 mA (max) of supply current per silicon die. These dual die ICs also include signal path and I/O diagnostics designed to meet the needs of stringent ASIL safety requirements. Both devices can operate in a Low RPM mode, to support up to 12 bits of output resolution, and in a High RPM mode to support situations demanding faster refresh rates and lower single path latency. As part of their signal processing functions, the ICs include automotive grade temperature compensation to provide accurate angle measurements over the full operating temperature (-40°C to 150°C) and voltage range (4.5 V to 14.5 V) of the devices. The A1331 and A1334 output signals maintain a high level of accuracy over a wide magnetic field range, and can operate over a field range of less than 300 G to greater than 1,000 G. On-chip EEPROM technology also enables flexible customer programming of the ICs. The A1331 IC is unique in that it contains both a micro-power mode of operation and an internal electronic turns counter function. Both of these features are important in automotive steering (EPS) applications, where it is important to keep track of the absolute position of the steering wheel over multiple revolutions. The A1331 can be connected to the vehicle battery, and placed into micro-power mode (100 µA average consumption per die) when the automobile is in the “key off” state. The A1331 will detect turning of the steering wheel while in micro-power mode and will sense and store the revolution count of the steering wheel, even while the car is in the key off position. As a result, when the vehicle is powered on (key-on position) the steering system is aware of the absolute position of the steering wheel. This turns counter function counts in increments of 180 mechanical degrees, with a range of 511 positive increments and 512 negative increments.
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