Product Details

describe:

The DRV8424 /25 are AD5231BRU10 stepper motor drivers for industrial and consumer applications. The device fully integrates two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8424 is capable of driving up to 2.5A full-scale output current; and the DRV8425 is capable of driving up to 2A full-scale output current (depending on PCB design).

The DRV8424/25 use an internal current sense architecture that eliminates the need for two external power sense resistors, saving PCB area and system cost. These devices use an internal PWM current regulation scheme that allows you to choose between smart tuning, slow and mixed decay options. Smart tune automatically adjusts for optimal current regulation, compensates for motor variation and aging effects, and reduces audible noise from the motor.

A simple STEP/DIR interface allows an external controller to manage the direction and step rate of the stepper motor. The device can be configured in full step to 1/256 microstep. A low-power sleep mode is provided using the dedicated nSLEEP pin. Provides protection against power supply undervoltage, charge pump failure, overcurrent, short circuit, and overtemperature. Fault conditions are indicated by the nFAULT pin.

characteristic:

●PWM microstepping motor driver

- Simple STEP/DIR interface

— Microstepping indexers up to 1/256

●Integrated current detection function

- No sense resistor required

— ±5% full-scale current accuracy

●Intelligent tuning decay technology, fixed slow and mixed decay options

4.5 to 33V operating power supply voltage range

●Low R DS(ON) :

— DRV8424: 330 mΩ HS + LS at 24 V, 25°C

— DRV8425: 550 mΩ HS + LS at 24 V, 25°C

● High current capacity per bridge

— DRV8424: 4 A peak, 2.5 A full scale, 1.8 A rms

— DRV8425: 3.2 A peak, 2 A full scale, 1.4 A rms

●Pin-to-Pin Compatible-

— DRV8426: 33V, 900mΩ HS + LS

— DRV8436: 48V, 900mΩ HS + LS

— DRV8434: 48V, 330mΩ HS + LS

●Configurable off-time PWM chopper

— 7-µs, 16-µs, 24-µs, or 32-µs.

●Support 1.8V, 3.3V, 5.0V logic input

●Low current sleep mode (2 μA)

●Spread-spectrum clocking for low electromagnetic interference (EMI)

●Small package and footprint

●Protection function

— VM undervoltage lockout (UVLO)

— Charge Pump Undervoltage (CPUV)

— Over Current Protection (OCP)

— Thermal Shutdown (OTSD)

—Fault condition output (nFAULT)

parameter:

Number of full bridges: 2

Vs (min) (V): 4.5

with ABS (max) (V): 35

Full scale current (A): 2.0

Peak output current (A): 3.2

RDS(ON) (HS + LS) (mOhms): 550

Sleep current (uA): 2

Control method: step/direction

Control Interface: Hardware (GPIO)

Microstepping level: 256

Features: Current Regulation, Integrated Current Sense, Smart Tuning

Operating temperature range (°C): -40 to 125