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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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A4980 Folha de dados(PDF) 1 Page - Allegro MicroSystems |
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A4980 Folha de dados(HTML) 1 Page - Allegro MicroSystems |
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1 / 44 page  Description TheA4980 is a flexible microstepping motor driver with built-in translatorforeasyoperation.Itisasingle-chipsolution,designed to operate bipolar stepper motors in full-, half-, quarter- and sixteenth-step modes, at up to 28 V and ±1.4 A. The A4980 can be controlled by simple Step and Direction inputs, or through the SPI-compatible serial interface that also can be used to program many of the integrated features and to read diagnostic information. The current regulator can be programmed to operate in fixed off-time or fixed frequency PWM, with several decay modes to reduce audible motor noise and increase step accuracy. In addition the phase current tables can be programmed via the serial interface to create unique microstep current profiles to further improve motor performance for specific applications. The current in each phase of the motor is controlled through a DMOS full bridge, using synchronous rectification to improve power dissipation. Internal circuits and timers prevent cross- conduction and shoot-through, when switching between high- side and low-side drives. The outputs are protected from short circuits, and features for low load current and stalled rotor detection are included. Chip-level protection includes: hot and cold thermal warnings, overtemperature shutdown, and overvoltage and undervoltage lockout. The A4980 is supplied in a 28-pin TSSOP power package with an exposed thermal pad (package type LP). This package is lead (Pb) free with 100% matte-tin leadframe plating. A4980-DS, Rev. 2 Features and Benefits • Peak motor current up to ±1.4 A, 28 V • Low RDS(on) outputs, 0.5 Ω source and sink, typical • Automatic current decay mode detection/selection • Mixed, Fast, and Slow current decay modes • Synchronous rectification for low power dissipation • Internal OVLO, UVLO, and Thermal Shutdown circuitry • Crossover-current protection • Short circuit, and open load diagnostics • Hot and cold thermal warning • Stall detect features • SPI-compatible or simple Step and Direction motion control • Highly configurable via SPI-compatible serial interface Applications • Automotive stepper motors • Engine management • Headlamp positioning Automotive, Programmable Stepper Driver Package: 28-pin TSSOP with exposed thermal pad (suffix LP) Typical Applications Not to scale A4980 Automotive 12V Power Net Logic Supply Serial Interface Control Micro- controller or ECU OAP PGND VBB OSC OAM OBP OBM Stepper Motor AGND VCP STEP DIR MS0 MS1 ENABLE RESETn SDI SDO SCK STRn VDD DIAG SENSA SENSB REF VREG CP1 2 Parallel Control Automotive 12V Power Net Logic Supply or ECU OAP PGND VBB OSC OAM OBP OBM Stepper Motor AGND VCP STEP DIR MS0 MS1 ENABLE RESETn SDI SDO SCK STRn VDD DIAG SENSA SENSB REF VREG CP1 2 Micro- controller |
Nº de peça semelhante - A4980 |
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Descrição semelhante - A4980 |
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