TI DRV8412高性能双路全桥马达驱动方案

TI 公司的DRV8412/22/32是集成了先进保护系统的高性能双路全桥马达驱动器,功率级的效率高达成协97%. DRV8412/22/32需要两个电源,12V用于GVDD和VDD,50V用于PVDD. DRV8412双路全桥模式2x3A或并联6A连续模式, DRV8422双路全桥模式2x5A或并联10A连续模式, DRV8432双路全桥模式2x7A或并联14A连续模式,PWM频率高达500kHz,主要用于无刷DC和步进马达,三相永磁同步马达,机器人和触感力控制系统,精密仪表和TEC驱动器.本文介绍DRV8412/22/32主要特性, 系统方框图, 简化应用电路图, 全桥模式和并行全桥模式工作的应用框图, 步进马达工作的应用框图, 三相PMSM GND传感模式工作的应用框图以及TEC驱动器的应用框图.

The DRV8412/22/32 are high performance, integrated dual full bridge motor drivers with an advanced protection system.Because of the low R_DS(on) of the H-Bridge MOSFETs and intelligent gate drive design, the efficiency of these motor drivers can be up to 97%, which enables the use of smaller power supplies and heatsinks, and are good candidates for energy efficient applications.

The DRV8412/22/32 require two power supplies, one at 12 V for GVDD and VDD, and another up to 50 V for PVDD. The DRV8412/22/32 can operate at up to 500-kHz switching frequency while still maintain precise control and high efficiency. They also have an innovative protection system safeguarding the device against a wide range of fault conditions that could damage the system.

DRV8412/22/32主要特性:

High-Efficiency Power Stage (up to 97%) with Low R_DS(on) MOSFETs (80 m at T_J = 25℃)

Operating Supply Voltage up to 50 V (70 V Absolute Maximum)

DRV8412 (power pad down): up to 2 x 3 A Continuous Output Current (2 x 6 A Peak) in Dual Full Bridge Mode or 6 A Continuous Current in Parallel Mode (12 A Peak)

DRV8422 (power pad up): up to 2 x 5 A Continuous Output Current ( 2 x 9 A Peak) in Dual Full Bridge Mode or 10 A Continuous Current in Parallel Mode (18 A Peak)

DRV8432 (power pad up): up to 2 x 7 A Continuous Output Current ( 2 x 12 A Peak) in Dual Full Bridge Mode or 14 A Continuous Current in Parallel Mode (24 A Peak)

PWM Operating Frequency up to 500 kHz

Integrated Self-Protection Circuits Including Undervoltage, Overtemperature, Overload, and Short Circuit

Programmable Cycle-by-Cycle Current Limit Protection

Independent Supply and Ground Pins for Each Half Bridge

Intelligent Gate Drive and Cross Conduction Prevention

No External Snubber or Schottky Diode is Required

DRV8412/22/32应用:

Brushed DC and Stepper Motors

Three Phase Permanent Magnet Synchronous Motors

Robotic and Haptic Control System

Actuators and Pumps

Precision Instruments

TEC Drivers

图1.DRV8412/22/32系统方框图


图2.DRV8412/22/32简化应用电路图

图3.DRV8412/22/32全桥模式工作的应用框图

图4.DRV8412/22/32并行全桥模式工作的应用框图

图5.DRV8412/22/32步进马达工作的应用框图

图6.DRV8412/22/32三相PMSM PVDD传感模式工作的应用框图

图7.DRV8412/22/32三相PMSM GND传感模式工作的应用框图

图8.DRV8412/22/32 TEC驱动器的应用框图


图9.DRV8412 应用电路案例