Allegro MicroSystems, Inc.
Marlborough, MA 01752
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Latest QuietMotion BLDC Fan Drivers are Embedded with Windowless Sinusoidal Algorithm
The QuietMotion™ First Oriented Control (FOC) BLDC Fan Drivers include AMT49406 and A89301 models. The units can be operated in -40° to 105°C temperature range and feature 5.5 to 50 input voltage rating. They are offered in 24-contact 4 mm × 4 mm QFN and 24-lead TSSOP packages and are used with pole and ceiling fans, humidifiers, dehumidifiers, air purifiers and exhaust fans. The drivers...
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Linear 3.3 V Hall-Effect Sensor IC comes in miniature package.
Intended for applications requiring medium accuracy in small package, A1304 eliminates need to program device to compensate for temperature effects on sensor performance. Sensitivity and QVO TC are blind blown (trimmed) at factory for optimal accuracy, and programmable sensitivity level is 4 mV/G ±6% typ. Fabricated in BiCMOS monolithic process, product integrates Hall element, offset and...
Read More »
Off-Line PWM Controllers integrate power MOSFET.
Available in DIP-8 and SOIC-8 packages, STR4A100 series incorporates sense MOSFET and- current mode PWM controller IC. Products use secondary side regulation topology and make it possible to lower stand-by power to
Read More »Unipolar Hall-Effect Switch features built-in diagnostics.
With integrated coil surrounding Hall sensing element,- A1160 functions as- typical unipolar switch during normal operation: output turns on in presence of south-pole magnetic field and off when field is removed. Diagnostics mode- lets current pass through integrated coils, generating ~20 G of magnetic field. Proximity of coils to Hall sensing element- lets element sense field generated by...
Read More »
Voltage Regulators provide single LNB supply and control.
Generation 5 A8300 and A8300-1 are fully integrated linear and switching voltage regulators that provide power and interface signals to LNB down-converter via coaxial cable. While A8300 is optimized for low-profile ceramic boost capacitors, A8300-1 is designed for use with electrolytic capacitors. For DiSEqC™ communication, ICs provide internal 22 kHz tone gated with control pin or can accept...
Read More »User-Configurable SMPS targets telecom and medical markets.
C Series allows end-of-line selection of multiple output voltages to match alternative application circuit requirements while using same power supply base unit. Employing resonant mode hybrid IC and transformer, HWB Series employs soft-switched, multi-resonant zero-cross (SMZ) type resonant-mode circuits to achieve noise reduction in converter unit. SWF Series, suited for motorized applications,...
Read More »Current Sensor IC has thermally enhanced, integrated design.
Designed for maximum accuracy, ACS770 consists of linear Hall circuit with copper conduction path located near die. Precise proportional output voltage is provided by low-offset, chopper-stabilized BiCMOS Hall IC, while immunity to current conductor dV/dt and stray electric fields is offered by integrated shield technology. Available in 5-pin package, lead (Pb)-free product features digital...
Read More »
DC/DC Converter Module has step-down chopper circuit topology.
Targeting telecom and consumer markets, BR300 series includes control IC, inductor, ceramic capacitor, and standoff pins in each module. Non-isolated step down type DC/DC converter module provides complete solution that requires few external components. Along with 8–30 V input range, series features switching frequency of 350 kHz with output of 5 V, 1 A, and 5 W. Configuration is possible via...
Read More »
Motor Driver IC includes built-in translator.
Supplied in 20-pin TSSOP package, Model A4992- operates bipolar stepper motors in full, half, quarter, and eighth step modes at up to 28 V. Unit includes stall detect features and advanced diagnostics that can be configured through serial interface. Current regulator, operating with fixed frequency PWM, uses adaptive mixed current decay to minimize audible motor noise and maximize step accuracy....
Read More »
Dual Full Bridge Driver IC targets automotive, industrial markets.
Designed to operate one bipolar stepper or- 2 brush DC motors, A4990- includes diagnostic outputs and- short circuit, open load, over-temperature/-voltage, and UVLO protection circuits. Each full bridge uses DMOS power devices with integrated freewheeling diodes, and peak motor current can be limited. Allowing 2-phase on, full step operation, stepper motors can be driven with full current in...
Read More »
Latest QuietMotion BLDC Fan Drivers are Embedded with Windowless Sinusoidal Algorithm
The QuietMotion™ First Oriented Control (FOC) BLDC Fan Drivers include AMT49406 and A89301 models. The units can be operated in -40° to 105°C temperature range and feature 5.5 to 50 input voltage rating. They are offered in 24-contact 4 mm × 4 mm QFN and 24-lead TSSOP packages and are used with pole and ceiling fans, humidifiers, dehumidifiers, air purifiers and exhaust fans. The drivers...
Read More »
Linear 3.3 V Hall-Effect Sensor IC comes in miniature package.
Intended for applications requiring medium accuracy in small package, A1304 eliminates need to program device to compensate for temperature effects on sensor performance. Sensitivity and QVO TC are blind blown (trimmed) at factory for optimal accuracy, and programmable sensitivity level is 4 mV/G ±6% typ. Fabricated in BiCMOS monolithic process, product integrates Hall element, offset and...
Read More »
Off-Line PWM Controllers integrate power MOSFET.
Available in DIP-8 and SOIC-8 packages, STR4A100 series incorporates sense MOSFET and- current mode PWM controller IC. Products use secondary side regulation topology and make it possible to lower stand-by power to
Read More »Unipolar Hall-Effect Switch features built-in diagnostics.
With integrated coil surrounding Hall sensing element,- A1160 functions as- typical unipolar switch during normal operation: output turns on in presence of south-pole magnetic field and off when field is removed. Diagnostics mode- lets current pass through integrated coils, generating ~20 G of magnetic field. Proximity of coils to Hall sensing element- lets element sense field generated by...
Read More »
Voltage Regulators provide single LNB supply and control.
Generation 5 A8300 and A8300-1 are fully integrated linear and switching voltage regulators that provide power and interface signals to LNB down-converter via coaxial cable. While A8300 is optimized for low-profile ceramic boost capacitors, A8300-1 is designed for use with electrolytic capacitors. For DiSEqC™ communication, ICs provide internal 22 kHz tone gated with control pin or can accept...
Read More »User-Configurable SMPS targets telecom and medical markets.
C Series allows end-of-line selection of multiple output voltages to match alternative application circuit requirements while using same power supply base unit. Employing resonant mode hybrid IC and transformer, HWB Series employs soft-switched, multi-resonant zero-cross (SMZ) type resonant-mode circuits to achieve noise reduction in converter unit. SWF Series, suited for motorized applications,...
Read More »Current Sensor IC has thermally enhanced, integrated design.
Designed for maximum accuracy, ACS770 consists of linear Hall circuit with copper conduction path located near die. Precise proportional output voltage is provided by low-offset, chopper-stabilized BiCMOS Hall IC, while immunity to current conductor dV/dt and stray electric fields is offered by integrated shield technology. Available in 5-pin package, lead (Pb)-free product features digital...
Read More »
DC/DC Converter Module has step-down chopper circuit topology.
Targeting telecom and consumer markets, BR300 series includes control IC, inductor, ceramic capacitor, and standoff pins in each module. Non-isolated step down type DC/DC converter module provides complete solution that requires few external components. Along with 8–30 V input range, series features switching frequency of 350 kHz with output of 5 V, 1 A, and 5 W. Configuration is possible via...
Read More »
Motor Driver IC includes built-in translator.
Supplied in 20-pin TSSOP package, Model A4992- operates bipolar stepper motors in full, half, quarter, and eighth step modes at up to 28 V. Unit includes stall detect features and advanced diagnostics that can be configured through serial interface. Current regulator, operating with fixed frequency PWM, uses adaptive mixed current decay to minimize audible motor noise and maximize step accuracy....
Read More »
Dual Full Bridge Driver IC targets automotive, industrial markets.
Designed to operate one bipolar stepper or- 2 brush DC motors, A4990- includes diagnostic outputs and- short circuit, open load, over-temperature/-voltage, and UVLO protection circuits. Each full bridge uses DMOS power devices with integrated freewheeling diodes, and peak motor current can be limited. Allowing 2-phase on, full step operation, stepper motors can be driven with full current in...
Read More »