Allegro MicroSystems, Inc.

Electrical Equipment & Systems

Linear Hall-Effect Sensor IC provides PWM 2-wire output.

Featuring ambient temperature range of 40-150°C, customer-programmable Model A1357 converts analog signal from internal Hall sensor element to digitally encoded PWM output signal. Duty cycle of PWM output signal is proportional to applied magnetic field. BiCMOS, monolithic circuit inside A1357 integrates Hall element, precision temperature-compensating circuitry, high-gain amplifier,...

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Controls & Controllers

Single, Dual LNBRs enhance satellite receiver operation.

Low noise block converter regulator (LNBR) models A8295, A8297, and A8298 provide power and interface signals to LNB down converter via coaxial cable. Integrated boost MOSFET, current sensing, and compensation simplify design as well as minimizes components and PCB size. While single-output A8295 serves single-tuner satellite STB market, dual-output A8297 is suited for dual-tuner DVR models, and...

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Electrical Equipment & Systems

Two-Wire Hall-Effect Latch protects against voltage transients.

Programmed at factory to optimize magnetic switch point accuracy, Model A1244 uses 4-phase, chopper-stabilization technique. BiCMOS wafer fabrication process achieves magnetic stability over temperature and eliminates offset inherent in single-element devices when exposed to harsh environments. Available package styles include SOT-23W miniature low-profile style for surface mount applications and...

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LED Driver ICs target automotive infotainment applications.
Construction Equipment and Supplies

LED Driver ICs target automotive infotainment applications.

As multi-output LED drivers for LCD backlighting, A8502 and A8514 integrate current-mode boost converter with internal power switch and multiple current sinks. LED sinks can be paralleled together to achieve higher LED currents. Operating from single power supply from 5-40 V, ICs can optionally drive external PMOS to disconnect input supply from system in case of fault. Both products offer...

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LED Backlight Driver IC meets needs of medium/large displays.
Construction Equipment and Supplies

LED Backlight Driver IC meets needs of medium/large displays.

Suited for backlighting LCD monitors and TVs, A8516 WLED/RGB driver helps designers reduce component count by integrating boost controller to drive external MOSFET and 6 internal current sink channels capable of up to 80 mA each. Channels can be combined to achieve higher currents, and boost converter operates in constant frequency (programmable) current mode control. LED sink current is set by...

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Dual DMOS Full Bridge Motor Driver IC delivers PWM control.
Controls & Controllers

Dual DMOS Full Bridge Motor Driver IC delivers PWM control.

Designed for PWM control of 2 DC motors, A4954 is capable of peak output currents to ±2 A and operating voltages to 40 V. Integrated charge pump capacitors reduce external component count, while input terminals are provided for controlling speed and direction of DC motor with externally applied PWM control signals. In addition to integrated protection, IC features internal synchronous...

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Hall Effect Switches offer high voltage transient protection.
Electrical Equipment & Systems

Hall Effect Switches offer high voltage transient protection.

Targeting automotive market, A1152/3/5/6 Switches employ 4-phase, chopper-stabilized technique to achieve magnetic stability over temperature and to eliminate offset inherent in single-element devices. On-chip transient protection allows devices to survive ISO 7637-2 and 40 V load dump for less than 0.5 sec with minimal or no protection from discrete components. Two-wire unipolar units can sense...

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Linear Hall-Effect Sensor IC features user programmable design.
Electrical Equipment & Systems

Linear Hall-Effect Sensor IC features user programmable design.

With carrier frequency of 2 kHz, Model A1356 integrates Hall element, temperature-compensating circuitry, high-gain amplifier, dynamic offset cancellation circuits, and PWM conversion circuitry. Device converts analog signal from internal Hall sensor element to digitally encoded PWM output signal. Duty cycle of PWM output signal is proportional to applied magnetic field. For design and...

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Three-Phase Motor Drivers withstand voltages up to 500 V.
Controls & Controllers

Three-Phase Motor Drivers withstand voltages up to 500 V.

Employing small-footprint SOP package, SX68000M Series features 85-230 Vac input range and 1.5-2.5 A output current, providing IPM solution for controlling motor inverters used to drive small-size motors in residential and commercial appliances. ICs consist of all power elements needed to configure main circuit of inverter, including 6 MOSFETs and 2 pre-drive ICs.

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Constant Current LED Drivers suit automotive applications.
Construction Equipment and Supplies

Constant Current LED Drivers suit automotive applications.

Offered in eMSOP-10 (LY) and eTSSOP-16 (LP) packages, Series A6261/2/4 are fully qualified to automotive quality standards, offer 4 channels of up to 100 mA LED current, and can be paralleled for higher currents. User-selected current is provided to 4 outputs, with each output equally sharing load. Operating with low dropout voltage to minimize power dissipation, drivers do not require any...

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