Allegro MicroSystems Europe Ltd
Allegro MicroSystems Europe Ltd Articles
Full die redundancy included with linear Hall sensor IC
Incorporating full die redundancy with the added benefits of full diagnostics, the A1336 from Allegro Microsystems includes a combination of these two features, which allows for a higher level of diagnostics without interruption to the application (where diagnostics would otherwise render a die temporarily unresponsive), and also allows the controller to know which die to trust when the two outputs do not agree.
Hall sensor IC is targeted at automotive applications
The ALS31000 from Allegro MicroSystems is a unidirectional linear Hall sensor IC targeted at automotive and industrial applications such as displacement and angular position sensing which require high-accuracy operation combined with a small package size. The accuracy of this factory-programmed device is enhanced via end-of-line programming of the temperature coefficient to optimise both sensitivity and quiescent voltage output across the fu...
Current sensors for isolation in high voltage systems
Any item of equipment that incorporates high voltage control components and a user interface has to be designed with safety clearly in mind in order to protect users from electric shock. Shaun Milano of Allegro MicroSystems explains.
LED driver features dimmable interior lights
Allegro MicroSystems Europe has introduced an automotive, AEC-Q100 qualified single IC switching regulator that provides constant-current output to drive high-power LEDs.
High-current density sensor provides precision programming
A family of fully integrated current sensor linear ICs has been released by Allegro MicroSystems Europe which are in core-less packages designed to sense AC and DC currents up to 100A. Allegro’s ACS780/ACS781 are provided in this automotive-grade, low-profile (1.5mm thick) sensor IC package that represents the highest current density of any Allegro current sensor IC package to date.
40V dual full-bridge driver device features fixed off-time PWM
The 40V dual full-bridge driver released by Allegro MicroSystems is capable of driving two DC motors with outputs rated up to 3.2A. Allegro’s A5995 device includes fixed off-time PWM (Pulse-Width Modulation) regulators for current control.
Power management IC with boost pre-regulator
A power management IC that can be configured as 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, has been announced by Allegro MicroSystems Europe.
Two motors in one package reduce footprint
Combining a bipolar stepper and high current DC motor driver IC in a single package, Allego MicroSystems Europe has announced the A5989 40V motor driver IC.
Linear current regulators drive automotive LED arrays
Designed to drive automotive LED arrays, two series of adjustable linear current regulators hve been announced by Allegro MicroSystems Europe. The AEC-Q100 qualified A6274 and A6284 low-EMI ICs integrate an optional pre-regulator gate drive to dynamically and linearly control an external P-channel MOSFET, which extends the output power capability of a linear LED driver by moving most of the power losses to an external power FET.
Automotive buck/boost controller integrates buck MOSFET
Designed for the automotive, industrial and instrumentation markets, an AEC-Q100 qualified PMIC has been introduced by Allegro MicroSystems Europe. The A4450 can implement either a buck or buck/boost regulator to efficiently convert automotive battery voltages into a tightly regulated voltage, with seamless transition between the buck and boost modes. Target applications include infotainment, instrument clusters, telematics, amplifiers and contro...
Hall-effect sensor IC offers reverse battery protection
The A1367 is a field programmable linear Hall-effect current sensor IC, from Allegro MicroSystems Europe, featuring a 240kHz bandwidth, integrated voltage regulator, reverse battery protection, user-selectable ratiometry and uni- or bi-directional output options.
Bipolar stepper motor driver IC integrates translator
Featuring a built-in translator for easy operation, Allegro MicroSystems Europe has announced a new bipolar stepper motor driver IC. The A5985 is designed to operate bipolar stepper motors from full-step up to 1/32 step modes that are selectable by MSx logic inputs. This device has an output drive capacity up to 40V and ±2A and operates with a single supply.
Three-wire true zero-speed magnetic speed sensor IC
Featuring an advanced sensing algorithm in a surface-mount SOIC-8 package, Allegro MicroSystems has released the A1667 speed sensor IC. This device provides a user-friendly solution for highly compact ring magnet applications using PCB mounting and is suitable for applications such as automotive transmissions and industrial equipment.
Unipolar Hall-effect switch features built in diagnostics
Featuring an externally enabled diagnostic function and user-programmable switchpoints, Allegro MicroSystems Europe has announced a unipolar Hall-effect switch. The A1162 has on-chip electromagnetic coils that are used to implement self-test of the sensor’s entire magnetic and electrical signal chain. It is designed for systems where precise magnet switchpoints and safety, reliability or both, are critical, such as those designed to meet th...
IC drives two stepper motors or four DC motors
Able to drive two stepper motors or four DC motors, the A5988 quad DMOS full-bridge driver IC has been introduced by Allegro MicroSystems Europe. Each full-bridge output is rated up to 1.6A and 40V. The A5988 includes fixed off-time PWM current regulators, along with 2-bit nonlinear DACs that allow stepper motors to be controlled in full, half, and quarter steps and DC motors in forward, reverse and coast modes.
Simple interface makes microstepping easy & accurate
Allegro MicroSystems Europe has introduced a family of complete microstepping motor driver ICs with built-in translators. The A5976, A5977 and A5979 have been designed to operate bipolar stepper motors in full-, half-, quarter-, eight, (A5977) and sixteenth- (A5976/79) step modes. All have the output drive capability of 40V and ±2.8A and include a fixed off-time current regulator that has the ability to operate in slow, fast or mixed-decay...
Current sensor IC offers 210ns response time
Allegro MicroSystems Europe announces its first ever 1MHz bandwidth Hall-effect current sensor IC with a lightning fast 210 ns response time. The ACS730 provides an economical and precise solution for AC or DC current sensing. Allegro’s ACS730 is targeted at industrial, commercial, and communications systems. Typical applications include motor control, load detection and management, switched-mode power supplies, and over-current fault prote...
Current sensors for isolation in high voltage systems
Any item of equipment that incorporates high voltage control components and a user interface has to be designed with safety clearly in mind in order to protect users from electric shock. This involves equipment meeting isolation standards through the use of insulation layers. Most standards require the user to be protected from electric shock by two levels of protection or a single layer of reinforced insulation protection. Shaun Milano of Allegr...
Buck LED driver internally generates PWM dimming
Offering constant-current output to drive high-power LEDs in automotive applications, two single-IC switching regulators have been introduced by Allegro MicroSystems Europe. These devices are the industry’s first, according to the manufacturer, to allow LED dimming without the need for local MCU, timer-based or PWM dimming control.
Switching regulators feature adjustable frequency
Allegro MicroSystems Europe has introduced two adjustable high frequency DC/DC step-down switching regulators with an integrated high-side power MOSFET suitable for power supply requirements of the latest infotainment systems. Allegro’s A8586 provides up to 3.5A output current; while the A8587 has output current of up to 2.0A. Both devices are automotive AEC-Q100 qualified and incorporate current mode control for fast transient response.