Maxim MAX14871全桥DC马达驱动方案
Maxim公司的MAX14871是4.5V-36V全桥DC马达驱动器,高达2.8A峰值马达电流,低功耗(30kHz/24V时的电流1mA),开态总桥电阻334mΩ,30kHz/24V时的电流1mA,具有短路保护,热关断和欠压锁住,主要用在工业自动化,打印机和扫描仪,售货机和游戏机.本文介绍了MAX14871主要特性,框图,典型应用电路图以及全桥DC马达驱动板MAXREFDES89#主要特性,框图,电路图,材料清单和PCB设计图.
The MAX14871 DC motor driver provides a low-power and simple solution for driving and controlling brushed motors with voltages between 4.5V and 36V. Very low driver on resistance reduces power during dissipation.
The MAX14871 features a charge-pump-less design for reduced external components and low supply current. Integrated current regulation allows user-defined peak startup motor currents and requires minimal external components.
The MAX14871 includes 3 modes of current regulation: fast decay, slow decay, and 25% current ripple modes. Current regulation based on 25% ripple simplifies the design and enables regulation independent of motor characteristics. A separate voltage sense input(SNS) reduces current-sensing errors due to parasitic trace resistance.
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