-18x16.jpg)
Login or create an account
CloseReturning Customer
I am a returning customer
Login or create an account
CloseRegister Account
If you already have an account with us, please login at the login form.
Your Account Has Been Created!
Thank you for registering with CNC Egy!
You will be notified by e-mail once your account has been activated by the store owner.
If you have ANY questions about the operation of this online shop, please contact the store owner.
Account Logout
You have been logged off your account. It is now safe to leave the computer.
Your shopping cart has been saved, the items inside it will be restored whenever you log back into your account.
A4988 Stepper Driver
The A4988 driver Stepper Motor Driver is a complete micro-stepping motor driver with built-in converter, easy to operate. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling).
A4988 driver includes a fixed off-time current regulator, the regulator can be in slow or mixed decay mode. The converter is the key to the easy implementation of the A4988.
There are no phase sequence tables, the high-frequency control interface programming etc. The application of the A4988 interface is very suitable for a complex microprocessor is not available or overload. In the stepping operation, the chopping control in the A4988 automatically selects the current decay mode (slow or mixed). The mix decay current control scheme can reduce audible motor noise, increased step accuracy, and reduced power consumption.
Provide internal synchronous rectification control circuitry, in order to improve the pulse width modulation (PWM) power consumption during operation.
Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout (UVLO) and crossover current protection. Don’t need special power-up sequencing. A4988 uses surface-mount QFN package (ES), the size is 5 mm × 5 mm, nominal overall package height is 0.90 mm, with an exposed thermal pad to enhance the heat dissipation function.
FEATURES :
- Automatic current decay mode detection/choice.
- Mixed with slow current decay mode.
- The low power dissipation of synchronous rectifier.
- Internal UVLO(ultra voltage lockout).
- Crossover current protection.
- Thermal shutdown circuit.
- Ground fault protection.
- Loading and short circuit protection.
- The optional five-step mode: full, 1/2, 1/4, 1/8 and 1/16.
Continuous Current (A) 1.0A(No Heatsink ), 2.0A (with Heat-Sinking) Five Step Mode full, 1/2, 1/4, 1/8 and 1/16. Logic Input 3-5.5V Shipment Dimensions 5 × 5 × 4 cm Shipment Weight 0.125 kg Supply Voltage (V) 8-35 V DC