DRV8834 Texas instruments

DRV8834

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DRV8834

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Описание

The DRV8834 provides a flexible motor driver solution for toys, printers, cameras, and other mechatronic applications. The device has two H-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).

Dual-H-Bridge Current-Control Motor Driver
- Capable of Driving Two DC Motors or One
  Stepper 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 V_M = 5 V, 25°C)
Low R_DS(ON): 305-mΩ HS + LS
(at V_M = 5 V, 25°C)
Wide Power Supply Voltage Range:
2.5 V to 10.8 V
Dynamic t_BLANK and Mixed Decay Modes for
Smooth Microstepping
PWM Winding Current Regulation and Limiting
Thermally Enhanced Surface-Mount Package

Number of full bridges	2
Vs (min) (V)	2.5
Vs ABS (max) (V)	11.8
Full-scale current (A)	1.5
Peak output current (A)	2
RDS(ON) (HS + LS) (mΩ)	305
Sleep current (µA)	0.6
Control mode	PH/EN, STEP/DIR
Control interface	Hardware (GPIO)
Microstepping levels	32
Features	Current Regulation
Rating	Catalog
Operating temperature range (°C)	-40 to 85