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Brief advent
A4988 is a complete microstepping motor motive force with integrated translator for straightforward operation This product is supplied in full, half, 1/4, 1/8 and 1/16 step modes function bipolar stepper motors, output force ability of up to 35 V and ± 2 A A4988 encompasses a constant off-time recent regulator, the regulator in sluggish or combined decay modes A4988 converter is the most important to the easy implementation As long as the "step" input inputting one pulse drives the motor one microstep There are no phase sequence tables, high frequency control lines, or advanced interfaces to program A4988 interface is very appropriate for advanced microprocessor is unavailable or is overburdened
In the micro-step operation, A4988 slicing control within robotically selects the current decay mode (Slow or Mixed) In mixed decay mode, the device is originally set to a fixed downtime in some immediate decay, then the rest of the slow decay downtime Mixed decay latest management scheme leads to reduced audible motor noise, increased step accuracy, and lowered energy intake Internal synchronous rectification control circuitry is equipped to improve the pulse-width modulation (PWM) operation strength consumption Internal circuit defense includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection Special strength sequencing
A4988 floor mount QFN equipment (ES), a length of 5 mm × 5 mm, nominal total kit top of 0 mm, with an exposed pad for enhanced thermal dissipation This package is Pb (suffix-T), with 100 percent matte tin leadframe plating
Features and Benefits
· Low RDS (On) Output
· Automatic latest decay mode detection / selection
· Mix with sluggish latest decay modes
· Synchronous rectification for low power dissipation
· Internal UVLO
· Cross-current protection
· three and 5 V well suited common sense supply
· Thermal shutdown circuitry
· Ground fault protection
· Load short-circuit protection
· Optional step 5 modes: full, 1/2, 1/4, 1/8 and 1/16
Dear buyer:
Pls go away message you want which color, otherwise we deliver green A4988 to you!