TI公司的DRV8833是雙橋馬達驅動器解決方案,包括有兩個H橋驅動器,可驅動兩個DC電刷馬達,或一個步進馬達, 螺線管和其它電感負載. DRV8833具有PWM繞組電流調整/限制,H橋的輸出電流1.5A RMS,2A峰值,工作電壓2.7V-10.8V,主要用在電池玩具,視頻照相雞,辦公室自動設備,游戲機和機器人.本文介紹了DRV8833主要特性,方框圖,應用電路以及DRV8833評估模塊電路圖.
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應用:
• Battery-Powered Toys
• Video Security Cameras
• Office Automation Machines
• Gaming Machines
• Robotics
圖1. DRV8833方框圖
圖2. DRV8833并行模式應用電路圖
DRV8833評估模塊
圖3. DRV8833評估模塊電路圖
圖4. DRV8833評估模塊元件布局圖
詳情請見:
http://www.ti.com/lit/ds/symlink/drv8833.pdf
和
http://www.ti.com/lit/ug/slvu498/slvu498.pdf
