The A4989SLDTR-T is a dual full-bridge gate driver with an integrated microstepping converter suitable for driving a wide range of high power industrial bipolar two-phase stepping motors (typically 30 to 500 watts). Motor power is provided by an external N-channel power MOSFET with a supply voltage of 12 to 50 volts.

A4989SLDTR-T This device includes two sinusoidal DACs that generate reference voltages for two independent fixed off-time pulse width modulation (PWM) current controllers. It also provides current regulation for an external power MOSFET full bridge.

The A4989SLDTR-T motor steps are controlled by a two-wire step and direction interface, providing complete microstepping control in full, 1/2, 1/4 and 1/16 step decompositions. The fixed off-time regulator is capable of operating in slow, mixed, or fast decay modes, and its operation reduces audible motor noise, increases step accuracy, and reduces power dissipation.

The key to the ease of implementation of this integrated circuit (IC) is the A4989SLDTR-T converter. Just one pulse on the "step" input will drive the motor one step (full, 1/2, 1/4 or 1/16 step, depending on the microstep selection input.). There are no phase sequence tables, high frequency control lines or complicated interfaces in this program. This reduces the need for complex microcontrollers.

Product parameters:

Product Type: Door Drivers

RoHS: Details

Product: MOSFET Gate Drivers

Type: Full-Bridge

Installation style: SMD/SMT

Package / Box: TSSOP-38

Number of Drivers: 2 Driver

Number of outputs: 2 Output

Output current: 200mA

Supply voltage - Min: 3 V

Supply Voltage - Max: 5.5 V

Rise time: 120 ns

Fall time: 60 ns

Minimum working temperature: - 20 C

Maximum working temperature: + 85 C

Series: A4989

Package: Reel

Packaging: Cut Tape

Maximum off delay time: 180 ns

Maximum turn-on delay time: 180 ns

Humidity Sensitivity: Yes

Idle Time—Maximum: 80 ns

Working power supply current: 10 mA

Product Type: Gate Drivers

Propagation Delay—Max: 180 ns

Rds On-drain-source on-resistance: 55 Ohms

Subcategory: PMIC - Power Management ICs

Brand Name: Dual Full-Bridge MOSFET Driver