DRV8834RGER.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Dual-H-Bridge Current-Control Motor Driver

– Capable of Driving Two DC Motors or One HStepper

Motor

• Two Control Modes:

– Built-In Indexer Logic With Simple

STEP/DIRECTION Control and Up to

1/32-Step Microstepping

– PHASE/ENABLE Control, With the Ability to

Drive External References for > 1/32-Step

Microstepping

• Output Current 1.5-A Continuous, 2.2-A Peak per

H-Bridge (at VM = 5 V, 25°C)

• Low R DS(ON): 305-mΩ HS + LS

(at VM = 5 V, 25°C)

• Wide Power Supply Voltage Range:

2.5 V to 10.8 V

• Dynamic tBLANK and Mixed Decay Modes for

Smooth Microstepping

• PWM Winding Current Regulation and Limiting

• Thermally Enhanced Surface-Mount Package

2 Applications

• Battery-Powered Toys

• POS Printers

• Video Security Cameras

• Office Automation Machines

• Gaming Machines

• Robotics

3 Description

The DRV8834 provides a flexible motor driver

solution for toys, printers, cameras, and other mechatronic applications. The device has two HStepper

bridge drivers, and is intended to drive a bipolar

stepper motor or two DC motors.

The output driver block of each H-bridge consists of

N-channel power MOSFETs configured as an H-

bridge to drive the motor windings. Each H-bridge

includes circuitry to regulate or limit the winding

current.

With proper PCB design, each H-bridge of the

DRV8834 can driving up to 1.5-A RMS (or DC)

continuously, at 25°C with a VM supply of 5 V. The

device can support peak currents of up to 2.2 A per

bridge. Current capability is reduced slightly at lower

VM voltages.

Internal shutdown functions with a fault output pin are provided for overcurrent protection, short-circuit

protection, undervoltage lockout and

overtemperature. A low-power sleep mode is also

provided.

The DRV8834 is packaged in a 24-pin HTSSOP or

VQFN package with PowerPAD™ (Eco-friendly:

RoHS & no Sb/Br).