原标题：ST STSPIN840两个双向有刷DC马达同时驱动方案

　　ST公司的STSPIN840是紧凑的有刷DC马达驱动器,能同时驱动两个双向有刷DC马达,在4 x 4 mm QFN封装上集成了两个控制逻辑和全保护低RDSon两个全桥功率级,工作电压从7V到45V,最大输出电流1.5Arms,全保护包括非耗散过流保护, 短路保护,欠压锁住和热关断.主要用在工业自动化和服务机器人,医疗和保健,ATM,舞台照明,热打印机,纺织和缝纫机,销售机以办公和家庭自动化.本文介绍了STSPIN840主要特性,框图,应用框图和电路,以及马达驱动扩展板X-NUCLEO-IHM15A主要特性,电路图和材料清单.

　　The STSPIN840 is a compact brushed DC motordriver able to drive two bi-directional brushed DCmotors simultaneously. It integrates, in a verysmall 4 x 4 mm QFN package, both the controllogic and a fully protected low RDSon dual fullbridgepower stage.

　　Thanks to a dedicated PARALLEL input pin theparallel mode function can be enabled,transforming the device in an equivalent andmore powerful single full-bridge able to deliver upto 3Arms current at an equivalent HS + LS RDSonof 500 mohm.

　　The STSPIN840 embeds two independent PWMcurrent controllers (one for each full bridge) basedon user settable values of reference voltage andOFF time.The devices can be forced in a low consumptionstate reducing the total current consumption downto less than 45uA.

　　As with all other devices from the STSPIN family,the STSPIN840 integrates a complete set ofprotections for the power stages (non-dissipativeovercurrent, thermal shutdown, short-circuit andundervoltage lockout) making it a bulletproofsolution for the new wave of demanding industrialapplications.

　　STSPIN840主要特性:

　　 Operating voltage from 7 to 45 V

　　 Maximum output current 1.5 Arms

　　 RDSon HS + LS = 1 ohmtyp.

　　 Current control with adjustable OFF time

　　 Current sensing based on external shuntresistors

　　 Full protections set

　　– Non-dissipative overcurrent protection

　　– Short-circuit protection

　　– Undervoltage lockout

　　– Thermal shutdown

　　 Parallel operation mode achieving single fullbridgeconfiguration with output IRMS = 3 Armsand RDSon HS + LS = 500 mohmtyp.

　　 Low standby current consumption

　　STSPIN840应用:

　　 Industrial automation and service robots

　　 Medical and health care

　　 ATM and money handling machines

　　 Stage lighting

　　 Thermal printers

　　 Textile and sewing machines

　　 Vending machines

　　 Office and home automation

　　图1.STSPIN840框图(通用)

　　图2.STSPIN840 PARALLEL模式应用电路

　　图3.STSPIN840典型应用电路

　　基于STSPIN840的双刷DC马达驱动扩展板X-NUCLEO-IHM15A

　　Dual brush DC motor driver expansion board based on STSPIN840 for stm32 Nucleo The X-NUCLEO-IHM15A1 dual brush DC motor driver expansion board is based on the STSPIN840 for STM32 Nucleo.

　　It provides an affordable and easy-to-use solution for the implementation of compact motor driving applications such as thermal printers, robotics and toys.

　　Thanks to the parallel operation, it can be easily converted to a single brush DC driver with double current capability.

　　The current limiters and complete set of protection features make it suitable for rugged applications.

　　The X-NUCLEO-IHM15A1 is compatible with the Arduino UNO R3 connector and most STM32 Nucleo boards.

　　马达驱动扩展板X-NUCLEO-IHM15A主要特性:

　　Voltage range from 7 to 45 V

　　Output current up to 1.5 Arms for each motor

　　Two independent current limiters with adjustable OFF time

　　Full protection set including: overcurrent, short-circuit, under voltage lock out and thermal shutdown

　　Parallel operation

　　Compatible with Arduino UNO R3 connector

　　Compatible with STM32 Nucleo boards

　　图4.马达驱动扩展板X-NUCLEO-IHM15A外形图

　　马达驱动扩展板X-NUCLEO-IHM15A材料清单: