Allegro MicroSystems Europe Ltd
Allegro MicroSystems Europe Ltd Articles
Dual-channel switch interface IC for Hall-effect sensor systems
The new A6850 from Allegro MicroSystems Europe is a dual-channel switch interface IC designed to simplify the implementation of two-wire Hall-effect sensor systems in automotive applications. The new device eliminates the need for an external sense resistor and comparator, thereby reducing system costs. The elimination of the sense resistor also results in a subsequent elimination of the voltage drop across the resistor, which can enable sensing ...
Dual full-bridge motor driver IC drives two DC motors
The new A3995 from Allegro MicroSystems Europe is a DMOS full-bridge motor driver IC designed to control two DC motors at currents of up to 2.4 A and drive voltages of up to 36 V.The new device operates over a logic supply voltage range from 3 to 5.5 V, and incorporates two independent fixed off-time PWM (pulse-width modulation) current regulators that operate in either fast or slow decay mode. The use of fixed off-time PWM current control reduce...
LNB voltage regulator ICs for satellite receivers
Allegro MicroSystems Europe has introduced four new voltage regulator integrated circuits for use in the LNB (low noise block) sections of analogue and digital satellite receivers. The A8290 and A8291 are single LNB supply control voltage regulators, while the A8286 and A8292 are dual LNB supply voltage regulators. All are designed for high efficiency, using Allegro's advanced BCD process.
Hall-effect bipolar switch is optimised for pulsed power
The new A1205 from Allegro MicroSystems Europe is a general-purpose Hall-effect bipolar switch that is optimised for applications where pulsing the supply line is used to conserve power. The new device is a next-generation replacement of Allegro's popular A3134 bipolar switch but with enhanced performance in a more compact package. The A1205 is designed to switch in response to a north/south alternating magnetic field, typically from a multi-pole...
Automotive grade relay driver IC
The new A2550 from Allegro MicroSystems Europe is an automotive grade relay driver IC which incorporates a 5 V voltage regulator, watchdog and reset circuitry, and three low-side DMOS relay driver outputs, providing robust performance over extended voltage and temperature ranges. The new device is designed to provide key functions in automotive relay-based applications where a microprocessor is used to implement complex system control and require...
Digitally programmable dual full-bridge MOSFET driver IC
The new A3985 from Allegro MicroSystems Europe is a digitally programmable dual full-bridge gate driver IC suitable for driving a wide range of higher power industrial bipolar two-phase stepper motors, two-phase brushless DC motors or dual brush DC motors in industrial, medical and office automation applications. The compact package of the A3985 means that a complete high-current microstepping motor driver or dual DC motor system can be implemen...
Charge-pump IC drives up to six white LEDs
The A8434 from Allegro MicroSystems Europe is a high-efficiency charge pump IC that offers a simple, low-cost method of driving up to six white LEDs in various application configurations. Using a proprietary adaptive control scheme (1x, 1.5x and 2x), the A8434 can deliver well-matched (within 0.5%) LED currents of up to 30 mA per LED channel while maintaining very high efficiency and low levels of electromagnetic interference. The LED current is ...
Constant-current LED driver IC with PWM control
The A6280 from Allegro MicroSystems Europe is a new 3-bit constant current LED driver which enables users to minimise the number of components needed to drive LEDs with large pixel spacing. The new driver controls LED luminance using a pulse width modulation (PWM) scheme which gives the application the capability of displaying up to one billion colours. An external resistor is used to set the overall maximum current, which can be set over a wide ...
Allegro MicroSystems Europe develops new simulation software for automotive sensors
Engineers at the Allegro MicroSystems Europe Sensor Applications Centre in Annecy, France, have developed a software simulator for the company's automotive Hall-effect sensors that has dramatically reduced development times and eased interaction with customers.
High-performance low-noise current sensors with 2100V RMS isolation
Allegro MicroSystems Europe has introduced two new families of high-performance low-noise Hall-effect current sensors featuring an isolation voltage of 2100 V RMS. Each device is available in ±5 A, ±20 A or ±30 A versions, with corresponding sensitivity levels of 185, 100 or 66 mV/A.
LNB voltage regulator ICs for satellite receiver applications
The new A8290 and A8291 from Allegro MicroSystems Europe are single low noise block (LNB) convertor regulator ICs for use in analogue and digital satellite receivers.
High-voltage microstepping motor driver IC with built-in translator and overcurrent protection
The new A3987 from Allegro MicroSystems Europe is a microstepping motor driver IC which combines an output drive capability of 50 V and ±1.5 A with built-in translator circuitry and overcurrent protection. The new device is designed to operate bipolar stepper motors in full, half, quarter and sixteenth step modes, and includes a fixed off-time current regulator which has the ability to operate in slow or mixed decay modes. Typical applications ...
Step-down regulator ICs combine wide input voltage range with 3 A and 4 A outputs
The new A8698 and A8697 from Allegro MicroSystems Europe are the latest additions to the company's range of step-down regulator ICs.
Dual full-bridge PWM motor driver IC
The new A3969 from Allegro MicroSystems Europe is a compact dual full-bridge pulse-width modulated (PWM) motor driver integrated circuit which is ideally suited to applications in portable equipment or where board space is limited.
White LED driver IC for display backlight and flash/torch
The A8530 from Allegro MicroSystems Europe is a high-efficiency charge pump integrated circuit that offers a simple, low-cost white LED driver solution for driving four display backlight and two flash/torch video-mode white LEDs.
Allegro's A138X Programmable Hall sensor ICs are low profile
The new A138X family of Hall-effect sensor integrated circuits from Allegro MicroSystems Europe are programmable, analogue-output devices that are offered in a choice of low-profile surface-mount packages.
PWM motor driver controls bipolar microstepping stepper motors
The new A3992 from Allegro MicroSystems Europe is a DMOS full-bridge microstepping PWM motor driver integrated circuit designed for the pulse-width-modulated (PWM) current control of bipolar microstepping stepper motors.
Hall-effect sensor ICs for battery-powered applications
The new A1391 and A1392 linear Hall-effect sensor ICs from Allegro MicroSystems Europe are micropower devices that feature a power consumption of only 10 mW in active mode. Despite the low power consumption, the features required to produce a highly accurate linear Hall effect IC have not been compromised.
Dual full-bridge MOSFET driver IC with microstepping translator
The A3986 from Allegro MicroSystems Europe is a dual full-bridge gate driver IC with integrated microstepping translator circuitry. The device is suitable for driving a wide range of industrial bipolar 2-phase stepper motors in the 30 to 500 W power range. Motor power is provided by external N-channel power MOSFETs at supply voltages from 12 to 50 V.