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Allegro MicroSystems Europe Ltd

Allegro MicroSystems Europe Ltd Articles

Displaying 241 - 260 of 277
Power
27th March 2008
Automotive-grade 3-phase motor-control ICs with built-in commutation logic

The new A3930 and A3931 from Allegro MicroSystems Europe are automotive-grade motor controller integrated circuits with built-in commutation logic to lessen the burden on the system microprocessor, simplifying system design and reducing cost. The new devices are ideally suited to the control of Hall-commutated 3-phase brushless DC motors driven by external N-Channel MOSFETs. If desired, the Hall sensor inputs can be driven directly by a micropro...

Pending
6th March 2008
Constant-current LED driver features 16 channels and 7-bit dot correction

New from Allegro MicroSystems Europe is the A6285, a 16-channel constant-current LED driver featuring individual channel current adjustment via a 7-bit dot correction register. Each channel of the A6285 can sink a constant current up to 80 mA, and a single external resistor sets the maximum LED drive current for all channels. Each channel's drive current can be individually adjusted from 0 to 100% of the maximum value via the dot correction regi...

Analysis
26th February 2008
Linear Hall-effect sensors have a user-selectable 'sleep' mode

The A139x family of linear Hall effect sensor integrated circuits from Allegro MicroSystems Europe combines micropower operation, a tri-state output and a user-selectable 'sleep' mode. The new sensor ICs provide a voltage output that is directly proportional to an applied magnetic field. The 'sleep' mode allows the devices to operate at a current consumption of less than 25 µA, which contrasts with typical Hall-effect ICs whose sensitivity befor...

Power
15th February 2008
Automotive-grade high-brightness constant-current LED driver IC

The new A6260 from Allegro MicroSystems Europe is a high-brightness constant-current LED driver IC which is designed to operate over the typical automotive voltage and temperature ranges. The input voltage range of the A6260 is specified down to 6 V, and the device will operate at up to 40 V. The linear constant-current output can be adjusted to deliver up to 350 mA in a typical application.

Wireless Microsite
1st February 2008
Hall-effect switch features low power consumption for battery-operated applications

The new A1171 from Allegro MicroSystems Europe is an ultra-sensitive micropower Hall-effect switch with latched digital outputs and either unipolar or omnipolar actuation. It features operation at low supply currents and voltages, making it ideal for battery-operated applications in portable or handheld communications and computer equipment.

Wireless
1st February 2008
Hall-effect switch features low power consumption for battery-operated applications

The new A1171 from Allegro MicroSystems Europe is an ultra-sensitive micropower Hall-effect switch with latched digital outputs and either unipolar or omnipolar actuation. It features operation at low supply currents and voltages, making it ideal for battery-operated applications in portable or handheld communications and computer equipment.

Mixed Signal/Analog
14th January 2008
Automotive-grade Hall-effect linear current sensors offer high accuracy

The new ACS714 and ACS715 from Allegro MicroSystems Europe are a range of automotive-grade Hall-effect linear current sensors combining high accuracy with excellent voltage isolation. The new devices are designed to provide economical and precise sensing solutions for AC and DC currents in automotive applications such as motor control, load detection and management, switched-mode power supply control, and overcurrent fault protection.

Power
29th November 2007
Low-voltage voice-coil motor driver IC with I2C interface

The new A3904 from Allegro MicroSystems Europe is said to be the first in a series of voice-coil motor driver ICs designed for camera auto-focus and zoom applications. Featuring a built-in I2C serial interface for precise high-speed digital programming with only two control lines, the new device features an operating voltage range of 2.4 to 5.5 V and a maximum output current of 127 mA. Output current is programmed via the I2C interface in 500 µA...

Pending
19th November 2007
Flyback convertor for driving vacuum fluorescent displays

The new A4401 from Allegro MicroSystems Europe is an automotive-grade quasi-resonant discontinuous flyback convertor control IC which provides all the necessary control functions for driving a vacuum fluorescent display (VFD) with the minimum of external components.

Power
2nd November 2007
Three-phase brushless DC motor pre-driver IC from Allegro

The new A4931 from Allegro MicroSystems Europe is a 3-phase brushless DC motor pre-driver integrated circuit with outputs for the direct high-current gate drive of an all N-channel power MOSFET 3-phase bridge with a maximum supply voltage of 38 V. The device includes three Hall-element inputs, a sequencer for commutation control, fixed off-time pulse width modulation (PWM) current control and locked rotor protection. Output current is scalable w...

Power
22nd October 2007
LED driver with PWM brightness control for large display applications

The new A6281 from Allegro MicroSystems Europe is a three-channel constant-current LED driver IC with an on-chip oscillator for simple programmable brightness control. The new device is ideally suited to driving clusters of red/green/blue (RGB) LEDs in applications where the cluster forms one pixel in a large display or a lighting fixture. It precisely controls LED brightness via 10-bit pulse-width modulation (PWM) on each channel, complemented...

Power
5th October 2007
DC motor driver IC from Allegro has typical input voltage range of 3 to 5.5V

The A3903 from Allegro MicroSystems Europe is a low-voltage bidirectional DC motor driver IC in an ultra-compact package measuring only 2 mm square and 0.55 mm high. The new device has a typical input voltage range of 3 to 5.5 V and produces an output current up to 500 mA. The output uses a full-bridge circuit incorporating source-side linear operation to produce a constant voltage across the motor coil. This regulated output minimises motor volt...

Analysis
20th September 2007
Dual-channel Hall-effect direction detection sensor with built-in fault protection

The A3423 from Allegro MicroSystems Europe is a dual-channel Hall-effect sensor designed for use in speed and direction sensing applications incorporating encoder ring-magnet targets. The new device is highly sensitive and temperature stable, making it ideal for use in harsh automotive and industrial environments. Integrated protection against electromagnetic interference and electrostatic discharge, along with output short-circuit protection, m...

Pending
7th September 2007
Compact DMOS microstepping motor driver IC with built-in translator

The A4983 from Allegro MicroSystems Europe is a compact DMOS microstepping motor driver IC with built-in translator circuitry for easy operation. The new device combines an easy-to-use step and direction interface with a high output capability of up to 35 V and ±2 A and high-resolution microstepping control. It is designed for the PWM (pulse-width modulation) control of bipolar stepper motors in full-, half-, quarter-, eighth, and sixteenth-step...

Analysis
22nd August 2007
Hot-swap protection IC uses Hall-effect current sensing

The ACS760 from Allegro MicroSystems Europe is a hot-swap protection IC designed for 12 V high-side applications. The new device combines Allegro's Hall-effect current sensing technology with hot-swap control circuitry, resulting in a highly efficient integrated controller. No external sense resistor is required, resulting in greatly reduced I2R losses in the power path.

Pending
11th August 2007
Motor-driver IC features integrated Hall-element commutation circuitry for driving vibration motors

The new A1442 from Allegro MicroSystems Europe is a full-bridge motor-driver integrated circuit which is optimised for driving vibration motors in applications such as mobile telephones, pagers, electronic toothbrushes, hand-held video game controllers and low-power fan motors.

Pending
24th July 2007
User-programmable Hall-effect linear sensors in miniature packages

Allegro MicroSystems Europe has introduced the first family of programmable Hall-effect linear sensors available in miniature package options: TO-92 (3-lead, single in-line package) or SOT-23W (3-lead, surface mount).

Power
5th July 2007
High-efficiency motor driver IC offers high current rating from very small package

The new A3989 from Allegro MicroSystems Europe is a high-efficiency motor driver IC designed to drive one bipolar stepper motor at up to 1.2 A and one DC motor at up to 2.4 A. The A3989 is designed for applications, typically found in office automation, automated handling equipment and gaming machines, that incorporate one DC motor and one stepper motor. The integration of two motor drivers in one compact package makes the A3989 more cost effect...

Pending
20th June 2007
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 ...

Power
7th June 2007
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...

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