Allegro MicroSystems, Inc.

Dual-Phase Controller IC targets active PFC circuits.
Agricultural & Farming Products

Dual-Phase Controller IC targets active PFC circuits.

Model SSC2101S dual-phase DCM interleaved PFC controller IC includes 2 boost regulators operating 180° out of phase in Discontinuous Conduction Mode (DCM), enabling all switching to be done at zero current. Featuring 8-pin package, IC incorporates feedback open loop detection, overvoltage protection, and overcurrent protection. It is designed for active PFC converters in telecom, server,...

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Dual Full-Bridge Motor Driver ICs have overcurrent protection.
Controls & Controllers

Dual Full-Bridge Motor Driver ICs have overcurrent protection.

Dual DMOS full-bridge stepper motor driver ICs A4986/A4987 can be controlled in full-, half-, and quarter-step modes. Each full-bridge, controlled by PHASE, I0, I1 logic inputs, offers output rated up to 35 V and ±2 A. Along with parallel input communication and overcurrent protection, features include 2-bit nonlinear DAC, synchronous rectification control circuitry, and fixed off-time PWM...

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Brushless DC Motor Pre-Driver IC targets office automation.
Controls & Controllers

Brushless DC Motor Pre-Driver IC targets office automation.

Supplied in 5 x 5 mm QFN package, A4936 provides outputs for direct high current gate drive of all N-channel power MOSFET 3-phase bridge with 38 V max supply voltage. Integrated elements include 3 Hall-element inputs, sequencer for commutation control, fixed off-time PWM current control, and locked-rotor detection. While output current is scaled by capability of external MOSFETs, locked rotor...

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Hall-Effect Bipolar Switch provides low-jitter output.
Electrical Equipment & Systems

Hall-Effect Bipolar Switch provides low-jitter output.

Suited for use in ring magnet-based speed and direction systems, A1230 monolithic IC contains 2 independent Hall-effect bipolar switches located 1 mm apart. Digital outputs are out of phase so that they are in quadrature when interfaced with proper ring magnet design. On-chip low dropout regulator facilitates use over wide operating voltage range. Device is available in lead free, plastic 8-pin...

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WLED/RGB Backlight Driver suits LCD monitors and televisions.
Electrical Equipment & Systems

WLED/RGB Backlight Driver suits LCD monitors and televisions.

Housed in 28-contact, 5 x 5 mm QFN package, Model A8512 integrates boost controller operating in constant frequency current mode control to drive external MOSFET, and 6 internal current-sinks capable of up to 80 mA each. Multiple drivers can be connected in parallel, allowing up to 36 LED strings to be powered by 1 boost converter. Operating from single 8-24 V supply, driver provides protection...

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DMOS Microstepping Motor Drivers offer overcurrent protection. .
Controls & Controllers

DMOS Microstepping Motor Drivers offer overcurrent protection. .

Equipped with built-in translator, Models A4982, A4984, A4985, and A4988 utilize STEP and Direction interface to operate bipolar stepper motors in full, Â-½, ¼, 1/8, and 1/16 step modes with output drive capacity up to 35 V and ±2 A. Fixed off-time current regulator operates in slow or mixed decay modes, while internal synchronous rectification control circuitry optimizes power...

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Hall-Effect Latches protect against high-voltage transients.
Electrical Equipment & Systems

Hall-Effect Latches protect against high-voltage transients.

Suited for operation to 150°C, A1225/A1227/A1229 temperature-stable and stress-resistant sensor ICs suit motor commutation applications in sunroofs and power windows in automotive market. Internal protection circuits enable device to survive 40 V load dump compliance without external protection components, and internal compensation provides magnetic switchpoints that become more sensitive...

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Xenon Photoflash Charger ICs come in 2 x 2 mm DFN package.
Electrical Equipment & Systems

Xenon Photoflash Charger ICs come in 2 x 2 mm DFN package.

Offering charge and trigger voltage logic thresholds set at 1 VHI, models A8732 and A8735 support applications implementing low-voltage control logic, such as mobile phones. Current limit for A8732 can be programmed from 0.45-1.5 in 16 steps with single wire interface, while for A8735 it is fixed at 1 A. Utilizing primary-side voltage sensing, devices eliminate need for secondary-side voltage...

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LED Driver suits medium LCD display backlighting.
Construction Equipment and Supplies

LED Driver suits medium LCD display backlighting.

Targeting automotive applications, Model A8501 integrates boost converter and four 100 mA current sinks. LED channels can be tied together for up to 400 mA sink capability. Operating from single power supply of 8-21 V, constant frequency, current-mode converter withstands up to 40 V. Operating frequency can be set up to 2 MHz to avoid interference with AM radio bands. Pb-free IC is housed in...

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Switching Regulator is designed for SMPS applications.
Controls & Controllers

Switching Regulator is designed for SMPS applications.

Series STR-X6700 is comprised of hybrid integrated circuits (HICs) with built-in power MOSFET and control IC designed for quasi-resonant type switch-mode power supplies. In normal operation, HIC promotes efficiency and minimal EMI noise with bottom-skip quasi-resonant operation during light output loads. Power consumption is also minimized by blocking (intermittent) oscillation during...

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