Texas Instruments DRV8305

Description

The TIDA-00772 is a 18 A RMS drive for a three phase brushless DC (BLDC) motor in power tools operating from a 5-cell Li-ion battery with a voltage up to 21 V. This design is a 45 x 50 mm compact drive implementing sensor-based trapezoidal control. The design uses a discrete, compact MOSFET-based three-phase inverter delivering 18 A RMS continuous (60 A peak for 1 second) winding current, without any external cooling or heat sink. The slew rate control and charge pump of the gate drive ensures maximum inverter efficiency (>98% at 18V DC) and optimum EMI performance. The cycle-by-cycle overcurrent protection feature protects the power stage from large stall currents and the board can work up to 55°C ambient. The small form factor enables flexible mounting of board, high efficiency brings more battery duration and the 60 A peak current capability provides high momentary peak torque in power tools.

Features

• Operates at voltage from 5 V to 21 V (5-cell Li-ion battery) with up to 18-ARMS continuous (60A peak for 1 second) winding current without heat sink or airflow
• Small PCB form factor of 45mm x 50mm
• Optimum inverter efficiency (>98% at 18 V) and EMI performance by using low RDS_ON NexFETs and utilizing the slew rate control and charge pump feature of the gate driver
• Cycle –by-cycle overcurrent protection with <1us response time and short circuit latch protection by VDS sensing
• Shoot-through, under voltage, over temperature and blocked rotor protection

Typical applications

• Appliances Compressors / Appliances Pumps & Fans / Humanoids
• Coffee Machines / Cordless Handheld Garden Tools / Cordless Power Tools / Cordless Vacuum Cleaners / Lawn Mowers / Robotic Lawn Mowers / Vaccum Robots

More information

• Datasheet
• IC product information