TI公司的DRV8833是双桥马达驱动器解决方案,包括有两个H桥驱动器,可驱动两个DC电刷马达,或一个步进马达, 螺线管和其它电感负载. DRV8833具有PWM绕组电流调整/限制,H桥的输出电流1.5A RMS,2A峰值,工作电压2.7V-10.8V,主要用在电池玩具,视频照相鸡,办公室自动设备,游戏机和机器人.本文介绍了DRV8833主要特性,方框图,应用电路以及DRV8833评估模块电路图.

The DRV8833 provides a dual bridge motor driver solution for toys, printers, and other mechatronic applications.

The device has two H-bridge drivers, and can drive two DC brush motors, a bipolar stepper motor, solenoids, or other inductive loads.

The output driver block of each H-bridge consists of N-channel power MOSFET’s 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 DRV8833 is capable of driving up to 1.5-A RMS (or DC) continuously, at 25°C with a VM supply of 5 V. It can support peak currents of up to 2 A per bridge. Current capability is reduced slightly at lower VM voltages.

Internal shutdown functions with a fault output pin are provided for over current protection, short circuit protection, under voltage lockout and overtemperature. A low-power sleep mode is also provided.

The DRV8833 is packaged in a 16-pin HTSSOP or QFN package with PowerPAD™ (Eco-friendly: RoHS & no Sb/Br).

DRV8833主要特性:

• PWM Winding Current Regulation/Limiting

• Thermally Enhanced Surface Mount Package 2

• Dual-H-Bridge Current-Control Motor Driver

– Capable of Driving Two DC Motors or One Stepper Motor

– Low MOSFET On-Resistance: HS + LS 360 mΩ

• POS Printers

• Output Current 1.5-A RMS, 2-A Peak per H-Bridge (at VM = 5 V, 25°C)

• Outputs Can Be Paralleled for 3-A RMS, 4-A Peak

• Wide Power Supply Voltage Range: 2.7 V – 10.8 V

DRV8833应用:

• Battery-Powered Toys

• Video Security Cameras

• Office Automation Machines

• Gaming Machines

• Robotics

图1. DRV8833方框图

图2. DRV8833并行模式应用电路图
DRV8833评估模块

图3. DRV8833评估模块电路图

图4. DRV8833评估模块元件布局图
详情请见:
http://www.ti.com/lit/ds/symlink/drv8833.pdf
和
http://www.ti.com/lit/ug/slvu498/slvu498.pdf