6.5A Three Phase Brushless DC Motor Driver with Inrush Protection  (PWM Ctrl) - DRV8312

DRV8312 (ACTIVE)

6.5A Three Phase Brushless DC Motor Driver with Inrush Protection (PWM Ctrl)

Description

The DRV8312/32 are high performance, integrated three phase motor drivers with an advanced protection system.

Because of the low RDS(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. These safeguards are short-circuit protection, overcurrent protection, undervoltage protection, and two-stage thermal protection. The DRV8312/32 have a current-limiting circuit that prevents device shutdown during load transients such as motor start-up. A programmable overcurrent detector allows adjustable current limit and protection level to meet different motor requirements.

The DRV8312/32 have unique independent supply and ground pins for each half bridge, which makes it possible to provide current measurement through external shunt resistor and support half bridge drivers with different power supply voltage requirements.

Features

  • High-Efficiency Power Stage (up to 97%) with Low RDS(on)
    MOSFETs (80 mΩ at TJ = 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
  • APPLICATIONS
    • BLDC Motors
    • Three Phase Permanent Magnet Synchronous Motors
    • Inverters
    • Half Bridge Drivers
    • Robotic Control Systems

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Parametrics Compare all products in 3-Phase Brushless Driver

 
Vs (Min) (V)
Vs (Max) (V)
RMS Output Current (A)
Peak Output Current (A)
RDS(ON) (HS + LS) (mOhms)
# of half-bridges
Control I/F
Additional Features
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
DRV8312 DRV8313 DRV8332
0     8     0    
52.5     60     52.5    
3.5     1.75     8    
6.5     2.5     13    
220     480     220    
3     3     3    
PWM     PWM     PWM    
Needs +12V gate drive supply     On-Chip Comparator     Needs +12V Gate drive supply & heatsink    
-40 to 85     -40 to 85     -40 to 85    
44HTSSOP     28HTSSOP     36HSSOP    
3.30 | 1ku     2.25 | 1ku     4.70 | 1ku    

Companion parts

Part # Name Product Family Comments
LMP8645   Precision High Voltage Current Sense Amplifier   Shunt-based/Non-Isolated - Current Shunt Monitor Analog Voltage Output    High performance, fully protected 3-phase brushless motor drive stage  
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