Product description:
- A4988 is a complete microstepping motor driver with built-in translator for easy operation. This product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A.
- A4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes.
- A4988 converter is the key to 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 complex interfaces to program.
- A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened.
- In the micro-step operation, A4988 chopping control inside automatically selects the current decay mode (Slow or Mixed). In mixed decay mode, the device is initially set to a fixed downtime in some fast decay, then the rest of the slow decay downtime.
- Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption.
- Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout (UVLO), and crossover-current protection. Special power sequencing.
- A4988 surface mount QFN package (ES), a size of 5 mm × 5 mm, nominal overall package height of 0.90 mm, with an exposed pad for enhanced thermal dissipation.
- This package is Pb (suffix-T), with 100% matte tin lead frame plating.
Specifcation:
- Rated Voltage: DC5V-12V 4-phase Reduction Ratio: 1/64 Step Torque Angle: 5.625°/64 DC Resistance: 200ω±7% (25°) Insulation Resistance: >10Mω (500V) Insulation Grade: A No-load Pull in Frequency: >600Hz No-load Pull out Frequency: >1000Hz Pull in Torque: >34.3mN.m(120Hz) Detent Torque: >34.3mN.m Temperature Rise: <40K(120Hz) Noise: <40dB (120Hz, No load, 10cm) Board Size: Approx. 40×21 mm On-board XH-5 P socket.connect 28BYJ-48 Stepper Motor direct .
- 4-phase Reduction Ratio: 1/64, Step Torque Angle: 5.625°/64
- DC Resistance: 200ω±7% (25°) Insulation Resistance: >10Mω (500V) Insulation Grade: A No-load
- Pull in Frequency: >600Hz No-load Pull out Frequency: >1000Hz Pull in Torque: >34.3mN.m(120Hz) Detent Torque: >34.3mN.m Temperature Rise: <40K(120Hz) Noise: <40dB (120Hz, No load, 10cm) Board Size: Approx. 40×21 mm On-board XH-5 P socket.connect 28BYJ-48 Stepper Motor direct .
- Pull in Frequency: >600Hz No-load Pull out Frequency: >1000Hz Pull in Torque: >34.3mN.m(120Hz) Detent Torque: >34.3mN.m Temperature Rise: <40K(120Hz) Noise: <40dB (120Hz, No load, 10cm) Board Size: Approx. 40×21 mm On-board XH-5 P socket.connect 28BYJ-48 Stepper Motor direct
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