TI DRV8876 N沟H桥马达驱动解决方案
TI公司的DRV8876是适用于各种终端应用的灵活多样的马达驱动器,集成了N沟H桥,电荷泵稳压器,电流检测和调制,电流正比输出和保护电路.电荷泵允许高边和低边N沟MOSFET和支持100%占空白比而提高了效率.集成的电流检测使得驱动器能调整起动时和大负载时的马达电流.限流可通过可调外部基准电压来设定.器件可驱动一个双向有刷DC马达,或两个单向有刷DC马达以及其它电阻和电感负载,工作电压4.5V-37V,输出电流峰值达3.5A,PH/EN和PWM H桥控制模式,单独半桥控制模式,支持1.8V,3.3V和5V逻辑输入,超低功耗睡眠模式:<1-μA @ VVM = 24-V, TJ = 25℃.集成的保护特性包括欠压锁住(UVLO),电荷泵欠压(CPUV),超电流保护(OCP),热关端(TSD),自动故障恢复和故障指标引脚(nFAULT).主要用在大型和小型家用电器,打印机和扫描仪,智能仪表,ATM,现钞点钞机和EPOS以及伺服马达和激励器,吸尘机,人形和玩具机器人.本文介绍了DRV887x系列主要特性,功能框图,应用电路,以及评估模块DRV8876x/74xEV主要特性,电路图,材料清单和PCB设计图.
The DRV887x family of devices are flexible motordrivers for a wide variety of end applications. Thedevices integrate an N-channel H-bridge, chargepump regulator, current sensing and regulation,current proportional output, and protection circuitry.
The charge pump improves efficiency by allowing forboth high-side and low-side N-channels MOSFETsand 100% duty cycle support. The family of devicescome in pin to pin, scalable RDS(on) options to supportdifferent loads with minimal design changes.
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