Allegro MicroSystems, Inc.

Dual Full-Bridge MOSFET Driver is digitally programmable.
Construction Equipment and Supplies

Dual Full-Bridge MOSFET Driver is digitally programmable.

Model A3985 powers bipolar 2-phase stepper motors and 2-phase brush/brushless dc motors through external N-channel power MOSFETs at supply voltages ranging from 12-50 V. Driver ensures gate-source voltage of high-side and low-side external MOSFETs are above 10 V. Two serially accessible registers provide digital control, while internal circuit protection provides thermal shutdown with hysteresis...

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LED Driver controls LED luminance with PWM control.
Software

LED Driver controls LED luminance with PWM control.

Offering wide range of output currents, Model A6280 3-bit constant current LED driver minimizes components needed to drive LEDs with large pixel spacing. Several drivers can be chained together and controlled by 4 control signals (clock, serial data, latch, and output enable), and each input has buffered outputs on chip. VIN pin can be tied to voltage supply bus to eliminate need for separate...

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PWM Motor Driver has quad DMSO full-bridge architecture.
Controls & Controllers

PWM Motor Driver has quad DMSO full-bridge architecture.

Supplied in 6 x 6 x .90 mm 36-pin QFN package or 7 x 7 mm 48-pin LQFP, A3988 can drive up to 2 stepper motors or 4 dc motors. Fixed off-time PWM current regulators, along with 2-bit nonlinear DACs, allow stepper motors to be controlled in full, half, and quarter steps or dc motors in forward, reverse, and coast modes. Each full-bridge output is rated up to 1.2 A and 36 V, and internal synchronous...

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PWM Motor Driver has dual full-bridge architecture.
Controls & Controllers

PWM Motor Driver has dual full-bridge architecture.

Supplied in 5 x 5 x 0.90 mm package, A3969 drives both windings of 2-phase bipolar stepper motor in portable and limited board space applications. It includes 2 H-bridges capable of continuous output currents of ±650 mA and operating voltages to 30 V. Along with internal fixed-frequency, PWM, current-control circuitry, product features internal circuit protection and ability to set peak...

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Step Down Regulators suit general purpose applications.
Controls & Controllers

Step Down Regulators suit general purpose applications.

Including integrated power DMOS switch, Models A8698 and A8697 are targeted at applications requiring 8-25 V input voltage rating and 3 A (A8698) or 4 A (A8697) output current. Regulation voltage is set by external resistors to output voltages as low as 0.8 V. They feature internal compensation and logic level enable pin which can shut down device and put it into low quiescent current mode for...

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Charge Pump IC drives WLEDs for backlight and flash/torch.
Electrical Equipment & Systems

Charge Pump IC drives WLEDs for backlight and flash/torch.

Supplied in 3.0 x 3.0 x 0.75 mm MLP-16 package, A8530 can drive 4 display backlight and 2 flash/torch/video mode white LEDs (WLEDs). Control scheme (1x, 1.5x, and 2x) allows for delivery of well-matched LED current, regulated over entire range of Li+ battery voltage to provide uniform intensity. Each backlight channel can be driven with up to 30 mA, while each flash/torch channel can be driven...

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PWM Motor Driver offers overcurrent protection.
Controls & Controllers

PWM Motor Driver offers overcurrent protection.

Designed for PWM current control of bipolar microstepping motors, Model A3992 DMOS full-bridge motor driver is capable of continuous output currents to ±1.5 A and operating voltages to 50 V. Internal fixed off-time circuitry is programmed via serial interface to operate in slow, fast, and mixed decay modes. Load current level is set via serial port with two 6-bit linear DACs in conjunction...

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Microstepping Motor Driver has 50 V rating.
Controls & Controllers

Microstepping Motor Driver has 50 V rating.

Offering output drive capability of 50 V and ±1.5 A, Model A3987 microstepping driver is designed to operate bipolar stepper motors in full, half, quarter, and sixteenth step modes. With built-in translator, low profile driver has fixed off time current regulator, and chopping control to automatically select decay mode. Internal circuit protection includes thermal shutdown with hysteresis,...

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Gate Driver features integrated microstepping translator.
Controls & Controllers

Gate Driver features integrated microstepping translator.

Suitable for driving medium to high-power bipolar 2-phase stepper motors, dual full-bridge Model A3986 provides all necessary circuitry to ensure that gate-source voltage of high-side and low-side external MOSFETs is above 10 V, and gate capacitance is quickly charged and discharged. Two sinusoidal DACs generate reference voltage for 2 separate fixed-off-time PWM current controllers. Full step to...

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SMPS Primary Regulators feature low EMI noise.
Controls & Controllers

SMPS Primary Regulators feature low EMI noise.

With low EMI noise characteristics at more than 2 MHz, STR-W67xx series of low-power off-line SMPS primary regulators includes quasi-resonant topology ICs, and enables output powers up to 160 W at 120 Vac, or 240 W at 230 Vac input. Soft switching mechanism turns on internal MOSFET at close point to VDS bottom point, while bottom-skip function skips first bottom of VDS and turns on MOSFET at...

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