Allegro MicroSystems, Inc.

Multi-Output Regulator is intended for automotive LCD bias.
Controls & Controllers

Multi-Output Regulator is intended for automotive LCD bias.

Offered in 28-pin eTSSOP, A8601 fixed-frequency, multiple-output supply for LCD bias is Automotive Grade AEC Q-100 qualified and targets infotainment applications. Switching frequency can be programmed or synchronized with external clock signal from 350 KHz to 2.25 MHz to minimize interference with AM and FM radio bands, and up to 5 output voltages are provided from 3 linear regulators and 2...

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Hall-Effect Bipolar Switch features high-speed chopping circuit.
Electrical Equipment & Systems

Hall-Effect Bipolar Switch features high-speed chopping circuit.

Operating at temperatures up to +150°C, Model A1250 integrates voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and short-circuit-protected, open-collector output on single silicon chip. On-board regulator permits operation with supply voltages of 3.0-24 V. Available in modified SOT-23W surface mount package or ultra-mini-SIP for...

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Low Noise Block Regulator targets set top boxes and LCD TVs.
Controls & Controllers

Low Noise Block Regulator targets set top boxes and LCD TVs.

Housed in 4 x 4 mm TQFN/MLP-20 package, Model A8303 utilizes small ceramic capacitors within boost regulator control instead of electrolytic units, making device suitable for LCD TV designs. IC combines integrated boost MOSFET, current sensing, and compensation. Resistor-programmed output current limit minimizes boost inductor/diode size. With key output voltage setting of 15.6 V, regulator...

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Hall-Effect Current Sensor IC integrates overcurrent detection.
Electrical Equipment & Systems

Hall-Effect Current Sensor IC integrates overcurrent detection.

Supplied in SMT package and optimized for 3.3 V supply operation, open-loop ACS716 has 120 kHz Bandwidth and consists of precision linear Hall sensor IC with copper conduction path near surface of silicon die. Integrated shield technology promotes immunity to current conductor dV/dt and stray electric fields, while voltage on overcurrent input (VOC pin) lets users define overcurrent fault...

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PWM Microstepping Driver IC offers synchronous rectification.
Controls & Controllers

PWM Microstepping Driver IC offers synchronous rectification.

Designed to drive one winding of bipolar stepper motor in microstepping mode, full-bridge A4975 features outputs rated for continuous output currents to ±1.5 A and operating voltages to 50 V. Internal PWM current control, combined with internal 3-bit nonlinear DAC, allows motor current to be controlled in full-, half-, quarter-, or eighth-step modes. Internal circuitry determines whether...

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Allegro MicroSystems, Inc. Announces Off-Line Quasi-Resonant Switching Regulators
Controls & Controllers

Allegro MicroSystems, Inc. Announces Off-Line Quasi-Resonant Switching Regulators

Flexible Solution with Low Power Consumption Worcester, MA - March 14, 2012 - Allegro MicroSystems, Inc. announces a new series of off-line, quasi-resonant switching regulators. This new series was developed to eliminate the requirement of a dedicated power supply to the standby circuits, by reducing the input power requirement at no load to 30 mW or less for 100 VAC input and to 50 mW or less...

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Low-Noise Block Regulator offers adjustable current limit.
Controls & Controllers

Low-Noise Block Regulator offers adjustable current limit.

Intended for analog and digital satellite receivers, Model A8299 is a monolithic linear and switching voltage regulator that provides power and interface signals to LNB down converter via coaxial cable. Unit requires few external components, with boost switch and compensation circuitry integrated inside. Housed in 5 x 5 x 0.90 mm QFN-28 package, regulator meets or exceeds OEM requirements for...

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Full-Bridge PWM Motor Driver features synchronous rectification.
Controls & Controllers

Full-Bridge PWM Motor Driver features synchronous rectification.

For bidirectional PWM current control of inductive loads, A4973 is capable of continuous output currents to ±1.5 A and operating voltages to 50 V. IC has internal fixed off-time PWM current-control circuitry that can be used to regulate max load current to desired value. Device comes in choice of 16-pin dual-in-line plastic package with copper heat-sink tabs or 16-pin plastic SOIC with...

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Construction Equipment and Supplies

Single String White LED Driver has fault-tolerant design.

Supplied in eMSOP-10 or eTSSOP-16 package with integrated current-mode boost converter, internal power switch, and current sink, single-output A8513 backlights LCDs in automotive/consumer designs. Driver can operate from single 4.5-40 V power supply to accommodate start/stop, cold crank, and load dump requirements, and 2 MHz boost converter switching frequency enables operation above AM radio...

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Controls & Controllers

PWM Motor Driver IC minimizes switching power losses.

Supplied in 24-pin surface-mount SOIC with 2 pairs of batwing leads, Model A4970 utilizes DMOS output technology that drives windings of bipolar stepper motor or bidirectionally controls 2 DC motors. Both bridges can sustain 45 V and include internal PWM control of output current to 750 mA. For PWM current control, max output current is determined by user selection of reference voltage and...

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