TIDRV8312和和StellarisMCU三相三相BLDC马达驱动方案马达驱动方案
TI公司的三相BLDC马达驱动套件DK-LM3S-DRV8312采用DRV8312三相马达驱动器和StellarisMCU,是中电压
数字马达控制(DMC)套件,能驱动三相BLDC和永磁同步马达,输入电压最大52.5V,每相连续输出电流最大3.5A,峰
值电流6.5A,驱动器开关频率高达500kHz.本文介绍了DRV8312/32主要特性,系统框图,三相应用框图和DRV8312
应用案例电路图,
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The DRV8312/32 are high performance, integrated three phase motor drivers with an advanced protection system.
Because of the low R
DS(on)
of the power 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 DRV8312/32 require two power supplies, one at 12 V for GVDD and VDD, and another up to 50 V for PVDD. The
DRV8312/32 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.
DRV8312/32主要特性:
High-Efficiency Power Stage (up to 97%) with Low R
DS(on)
MOSFETs (80 m at T
J
= 25°C)
Operating Supply Voltage up to 50 V (70 V Absolute Maximum)
DRV8312 (power pad down): up to 3.5 A Continuous Phase Current (6.5 A Peak)
DRV8332 (power pad up): up to 8 A Continuous Phase Current ( 13 A Peak)
Independent Control of Three Phases
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
DRV8312/32应用:
BLDC Motors
Three Phase Permanent Magnet Synchronous Motors
Inverters
Half Bridge Drivers
Robotic Control Systems
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