The new A3941 from Allegro MicroSystems Europe is an H-bridge device which complements the company’s existing line of automotive-grade MOSFET pre-driver ICs. This new device is designed around Allegro’s latest generation of BCD semiconductor process technology and includes enhanced features which make it an ideal choice for high-temperature automotive systems and industrial systems using a 24 V battery supply. In particular, significant im...

Allegro MicroSystems Europe has introduced the A1360/1/2 family of programmable linear Hall-effect sensor ICs feature extremely low noise levels and very high bandwidth, making them ideally suited to high-frequency automotive or industrial current sensing applications.

The A1172 from Allegro MicroSystems Europe is an ultra-sensitive micropower Hall-effect switch with complementary, latched digital outputs and omnipolar magnetic actuation. The new device features operation at low supply currents and voltages, making it ideal for battery-operated electronics. The combination of a low operating supply voltage (1.65 V to 3.5 V) and a unique clocking algorithm assists in reducing the average operating power consumpt...

At Sensor & Test 2008, Allegro MicroSystems Europe is featuring its latest families of Hall-effect sensors, including a number of precision current sensors designed for automotive and industrial applications.

New from Allegro MicroSystems Europe, the A1444 and A1445 are low-voltage full-bridge brushless DC motor driver ICs with integrated Hall commutation and internal PWM (pulse-width-modulation) speed control. Designed for applications that require rotor speed control and fast rotor start/stop cycles, the new devices are based on a high-density CMOS semiconductor process that allows the integration of a Hall element, an H-bridge output driver and PWM...

The new A1351 from Allegro MicroSystems Europe is a high-precision linear Hall-effect sensor IC with a 125 Hz push/pull pulse-width-modulated (PWM) output that is proportional to an applied magnetic field. The A1351 converts an analogue signal from its internal Hall sensor element to a digitally encoded PWM output signal. The coupled noise immunity of the digitally encoded PWM output is far superior to the noise immunity of an analogue output sig...

The new A4490 from Allegro MicroSystems Europe is a triple-output stepdown switching regulator integrated circuit providing three high-current outputs that are adjustable from 0.8 V to 5 V with a maximum current of 2 A.

The A6282 from Allegro MicroSystems Europe is a 16-channel LED driver IC with serial data inputs and outputs which allow easy cascading in large-scale display applications. The new device includes an input shift register, data latches, and 16 constant-current sink drivers delivering up to 50 mA per channel at 12 V. The CMOS shift registers and latches allow direct interfacing with microprocessor-based systems with supply voltages of 3.3 to 5 V.

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...

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...

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...

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.

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.

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.

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.

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...

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.

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...

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...

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...