Allegro MicroSystems, Inc.

Controls & Controllers

Switching Regulator ICs offer 4 levels of protection.

Manufactured in DIP-8 package, STR-A6251/51M/52 series is comprised of off-line PWM topology SMPS primary switchers with jittering function for reduction of EMI noise-filtering circuits. They offer frequency jittering for SMPS up to 20 W universal input, and external adjustment capability enables optimal jitter-frequency setting. Along with primary controlled CV/CC operation, auto-standby, and...

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Controls & Controllers

Step-Down Regulator targets consumer electronics.

With 50 V input range, High-Voltage Buck Regulator, Model A8499 is suited for applications where 12, 20, 26, and 28 V input voltages may occur. Internal blanking circuit is used to filter out transients due to reverse recovery of external clamp diode. Typical blanking time is 200 nS, and output voltage is adjustable from 1.2-24 V based on resistor divider and 1.2 V, 3% reference. Supplied in...

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Controls & Controllers

Full-Bridge Motor Driver features integrated Hall element.

Designed to drive single-phase, low-voltage bipolar brushless dc motors, Model A1441 uses single Hall element to detect position of alternating pole ring magnet. On-chip charge pump circuit allows use of MOS full-bridge output. Switchpoints of device are chopper-stabilized for precision over operating temperature and voltage. Active braking function and sleep mode can be enabled by external...

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Electrical Equipment & Systems

Xenon Photoflash Charger ICs feature integrated IGBT driver.

Housed in 3 x 3 mm 10-lead MLP package, Series A843X features selectable primary-peak current settings, integrated 40 V MOSFET, and charge-complete indication. Flyback converter employs algorithm to rapidly charge photoflash capacitor to desired voltage. Models A8436 and A8438 offer 3-level, pin-selectable current limit and low-leakage feedback scheme, while Model A8439 features 8-level digitally...

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Controls & Controllers

Microstepping Motor Driver has built-in translator.

With output drive capability of 35 V and ±2.5 A, A3979 operates bipolar stepper motors in full-, half-, quarter- and sixteenth-step modes. Its 2-input STEP and DIRECTION interface makes unit suited for applications with multiple motors. By inputting one pulse on STEP input, motor will take one microstep. Features include internal synchronous rectification control circuitry, dual-mode fixed...

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Sensors, Monitors & Transducers

Chopper-Stabilized Latch targets automotive applications.

Suited for motor-speed and direction-sensing applications, current-output, Hall-effect Model A1242 features 2-wire design that provides inherent short/open detection. Unit employs high-frequency chopper-stabilization technique on digital analog BiCMOS process to achieve magnetic stability over temperature. It provides on-chip transient protection, while zener clamp on power supply protects...

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Analog Speed Sensor has self-calibrating design.
Sensors, Monitors & Transducers

Analog Speed Sensor has self-calibrating design.

Suited for non-TPOS camshaft applications, ATS616LSG peak-detecting device uses automatic gain control and integrated tracking capacitor to provide gear-edge detection down to low operating speeds. Sensor subassembly consists of samarium-cobalt magnet, pole piece, and differential open-collector Hall IC. Processing circuitry contains ADC that self-calibrates internal gain of device, and...

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Unipolar Switches offer various packaging options.
Electrical Equipment & Systems

Unipolar Switches offer various packaging options.

Produced with BiCMOS technology, A110x family includes A1101/02/03/04/06 Hall-effect switches that are packaged in 3-pin single in-line and 3-pin SMT packages (LH). Continuous-time unipolar switch family, with option for Pb-free plating, include voltage regulator, Hall-voltage generator, small-signal amp, Schmitt trigger, and NMOS output transistor on one silicon chip. On-board protection...

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Bipolar Switches are offered in 2 packaging options.
Electrical Equipment & Systems

Bipolar Switches are offered in 2 packaging options.

Available in 3-pin single in-line package (UA) and 3-pin SMT package (LH), A1201/02/03/04 Hall-effect switches offer Pb-free plating option and are stress-resistant for use in extended temperature ranges. Hall plate geometries and low-offset low-noise amplifiers minimize noise and reduce residual offset voltage. Produced in BiCMOS technology, products are suited for computer/office, industrial,...

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