Allegro MicroSystems, Inc.

Agricultural & Farming Products

Voice Coil Motor Driver comes with I²C serial interface.

Designed for camera auto focus and zoom applications, Model A3904 features 2.4-5.5 V operating voltage range, 127 mA maximum output current, and -40 to +85°C operating temperature range. Output current is programmed via IÂ-²C interface in 500 µA increments with clock rates up to 400 kHz, while I2C inputs set internal DAC output voltage used as reference for linear current...

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Flyback Converter Control suits VFD power supplies.

Designed to work over automotive battery voltage range of 7-40 V in temperatures from -40 to +125°C ambient, Model A4401 automotive grade, quasi-resonant, discontinuous flyback converter control IC supports range of power requirements via sizing of external MOSFET and magnetics. Integrated transconductance amplifier regulates voltage on one or several outputs where cross-regulation is...

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Electrical Equipment & Systems

IGBT Modules have 100-240 Vac input voltage.

Providing power module for controlling 3-phase inverters used to drive motors of residential and commercial appliances, Series SCM1100M can withstand voltages up to 600 V and feature 5-15 A output current. IC consists of 6 IGBTs, 3 pre-drive ICs, and 6 flyback diodes needed to configure main circuit of inverter, as well as bootstrap circuit (3 bootstrap diodes and 3 boot resistors) as highside...

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Controls & Controllers

Brushless DC Motor Pre-Driver suits low current applications.

Model A4931 is designed with outputs for direct high current gate drive of N-channel power MOSFET 3-phase bridge with maximum supply voltage of 38 V. It also includes sequencer for commutation control, fixed off time pulse width modulation (PWM) current control, and locked rotor protection. Available in 5 x 5 mm, 28-lead, and Pb-free QFN package, unit operates over -20 to 105°C temperature...

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Electrical Equipment & Systems

LED Driver offers programmable brightness control.

Featuring on-chip oscillator, A6281 3-channel constant-current LED driver controls brightness via 10-bit PWM per channel, complemented by 7-bit analog current control per channel to adjust color balance. It drives up to 150 mA per channel and operates from supply voltage of up to 17 V. Clock, serial data, latch, and output enable control signals are buffered on chip to drive next pixel in...

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Sensors, Monitors & Transducers

Dual-Channel Sensor detects speed and direction.

Suited for applications incorporating encoder ring magnet targets, Model A3423 features 2 Hall elements that are spaced 1.63 mm apart and photo-lithographically aligned to better than 1 Â-µm. Low-drift amplifiers guarantee symmetry between switches to maintain signal quadrature, while on-chip regulator allows use of device over operating voltage of 3.8-24.0 V. Offering temperature stability,...

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Electrical Equipment & Systems

Integrated Circuit suits 12 V hot-swap applications.

Combining Hall-effect current sensing with hot-swap control circuitry, Model ACS760 incorporates external high-side FET gate drive, and produces analog output voltage proportional to applied current. User-controlled soft-start/hot-swap function is accessed via logic enable input pin. Housed in QSOP package, unit is designed for single-supply operation from 10.8-13.2 V. It has 1.5 mW internal...

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Controls & Controllers

Full-Bridge Motor Driver works with brushless DC motors.

Designed to drive low-voltage bipolar brushless DC motors, A1442 achieves commutation via one Hall element sensor to detect rotational position of alternating-pole ring magnet. Low-voltage design techniques help achieve device functionality down to 1.8 V VDD, and high-density CMOS semiconductor process allows integration of all necessary electronics. Integrated single chip solution does not...

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Controls & Controllers

DC Motor Driver comes in 2.0 x 2.0 mm package.

With input voltage range of 3.0-5.5 V, bi-directional Model A3903 produces output currents up to 500 mA. Output full-bridge incorporates source side linear operation to allow constant voltage supply across motor coil. Logic input pins are provided to control motor direction of rotation, brake, and standby modes and to allow optional PWM of sink drivers. Housed in 8-lead DFN package, Pb-free...

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