Products Overview
A4955 Full-Bridge PWM Gate Driver
Allegro MicroSystems
A4955 : Full-Bridge PWM Gate Driver
Designed for pulse-width-modulated (PWM) control of DC motors, the A4955 is capable of 50 V operation and provides gate drive for an all N-channel external MOSFET bridge.
Input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM control signals. Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation.
Internal circuit protection includes VDS protection, thermal shutdown with hysteresis, undervoltage monitoring of VBB, and crossover-current protection.
The A4955 is supplied in a low-profile 4×4 mm, 20-contact QFN package (suffix “ES”) and a 20-lead eTSSOP (suffix “LP”), both with exposed thermal pad.
| Part Number | Type | Operating Supply Current | Technology | Mounting Style | Output Current | Interface | Applications | Output Voltage | Operating Temperature | Operating Supply Voltage | Package Type |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A4955 | Full-Bridge | 6 mA | NMOS | Surface Mount | 68 mA | Parallel | General Purpose | 6.8 V | -40 °C ~ 105 °C(TA) | 5.5V ~ 50V | 20-Pin QFN (suffix “ES”) with Exposed Thermal Pad 20-Pin eTSSOP (suffix “LP”)with Exposed Thermal Pad |
-
Datasheet Download on Jul, 2022
Main Products
Allegro Micro Systems
A33115 Precision TMR Angle Sensor
360° angle sensor that provides high-resolution angular position information.
Current Sensor
Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise due to high dv/dt transients.
A31010 Unidirectional Linear Hall-Effect Sensors
Provide a voltage output proportional to the applied magnetic field.
A89506 Full-Bridge PWM Gate Driver
Ideal for DC motors and actuators in conventional, hybrid, and electric vehicles.
Brushless DC Drivers
Engineered to meet market challenges, delivering cost-optimized systems and improved time-to-market.
Brush DC Drivers
Broad portfolio of safe and robust brush DC solutions with both integrated and MOSFET gate drivers.
Stepper Motor Drivers
Delivers quiet, efficient, smooth motion to minimize noise and vibration in stepper motor designs.
Sensor Interface ICs
Allegro’s interface sensor ICs for speed and pressure sensors deliver fast and accurate output ideal for today’s demanding, space-constrained automotive and industrial applications.
Industrial Regulators
Allegro’s multiple-output DC/DC regulators enable smart and robust industrial designs.
Devoted to Excellent Professional Technical Support Throughout the Supply Chain
Everstar currently serves global semiconductor brands, including Allegro, AOS, Vincotech, and SHARP photocoupler, to offer products with complementary features. The products we carried integrate magnetic sensor chips, motor driver chips, power components, power modules, etc., to offer an extensive hardware infrastructure system design solution. The product applications focus on cloud server power suppliers, server cooling fan motor drivers, automotive power supply systems, LED lights, industrial motors, etc., targeted to broadly cover our customers' needs.
