Texas Instruments DRV8350RHRGZT | Demoboard TIDA-010056

Description

This reference design demonstrates a 1.5-kW power stage for driving a three-phase brushless DC motor in cordless tools operating from a 15-cell Li-ion battery with a voltage up to 63-V. The design is a 70mm x 69mm compact drive, bringing 25-ARMS continuous current at 20-kHz switching frequency without heat sink and with natural convection, implementing sensorbased trapezoidal control. The design achieves optimized MOSFET switching loss and EMI by using a smart gate driver with optimized MOSFET and PCB. The design shows MOSFET operation within the safe operating area using enhanced protections including MOSFET over current and shoot-through protection by VDS monitoring, gate protection, switching voltage spike optimization with slew rate control and over temperature protection.

Features

• 9 to 100-V, Triple Half-Bridge Gate Driver– Optional Integrated Buck Regulator– Optional Triple Low-Side Current Shunt Amplifiers
• Smart Gate Drive Architecture– Adjustable Slew Rate Control For EMI Performance– VGS Handshake and Minimum Dead-Time
• Insertion to Prevent Shoot-Through– 50-mA to 1-A Peak Source Current– 100-mA to 2-A Peak Sink Current– dV/dt Mitigation Through Strong Pulldown
• Integrated Gate Driver Power Supplies– High-Side Doubler Charge Pump For 100%
• PWM Duty Cycle Control– Low-Side Linear Regulator
• Integrated LM5008A Buck Regulator– 6 to 95-V Operating Voltage Range– 2.5 to 75-V, 350-mA Output Capability
• Integrated Triple Current Shunt Amplifiers– Adjustable Gain (5, 10, 20, 40 V/V)– Bidirectional or Unidirectional Support
• 6x, 3x, 1x, and Independent PWM Modes– Supports 120° Sensored Operation
• SPI or Hardware Interface Available
• Low-Power Sleep Mode (20 μA at VVM = 48-V)
• Integrated Protection Features– VM Undervoltage Lockout (UVLO)– Gate Drive Supply Undervoltage (GDUV)– MOSFET VDS Overcurrent Protection (OCP)– MOSFET Shoot-Through Prevention– Gate Driver Fault (GDF)– Thermal Warning and Shutdown (OTW/OTSD)– Fault Condition Indicator (nFAULT)

Typical applications

• Power and Garden Tools, Lawn Mowers
• Factory Automation and Textile Machines / Drones, Robotics, and RC Toys
• E-Bikes, E-Scooters, and E-Mobility

More information

• Datasheet
• IC product information