TI's DRV8305-Q1 is a three-phase motor drive gate driver that provides three half-bridge drivers, each capable of driving high-side and low-side N-channel MOSFETs; the charge pump driver supports 100% duty cycle. The device meets AEC-Q100 standard, 4.4-V to 45-V operating voltage, gate peak current 1.25A and 1A, operating temperature –40°C to 150°C, mainly used in three-phase BLDC and PMSM motors, automotive oil pumps and pumps, Fan and blower motor. This article introduces the main features of DRV8305-Q1, functional block diagram, typical application circuit diagram and main features, block diagram, circuit diagram and bill of materials of DRV8305-Q1EVM automotive three-phase motor gate drive evaluation module.
The DRV8305-Q1 device is a gate driver IC for three-phase motor-drive applicaTIons. The device provides three high-accuracy half-bridge drivers, each capable of driving a high-side and low-side N-channel MOSFET. Pump driver supports 100% duty cycle and low-voltage operaTIon for cold crank situaTIons. The device can tolerate load dump voltages up to 45-V.
The DRV8305-Q1 device includes three bidirectional current-shunt amplifiers for accurate low-side current measurements that support variable gain settings and an adjustable offset reference.
The DRV8305-Q1 device has an integrated voltage regulator to support an MCU or other system power requirements. The voltage regulator can be interfaced directly with a LIN physical interface to allow low-system standby and sleep currents.
The gate driver uses automatic handshaking when switching to prevent current shoot through. The VDS of both the high-side and low-side MOSFETs is substantially sensed to protect the external MOSFETs from overcurrent conditions. The SPI provides detailed fault reporting, diagnostics, and device Between such as gain options for the current shunt amplifier, individual MOSFET overcurrent detection, and gate-drive slew-rate control.
Device Options:
DRV8305NQ: Grade 1 with voltage reference
DRV83053Q: Grade 1 with 3.3-V, 50-mA LDO
DRV83055Q: Grade 1 with 5-V, ​​50-mA LDO
DRV8305NE: Grade 0 with voltage reference
Main features of DRV8305-Q1:
AEC-Q100 Qualified for Automotive Applications
Ambient Operating Temperature Ranges:
Temperature Grade 0(E): –40°C to 150°C
Temperature Grade 1 (Q): –40°C to 125°C
4.4-V to 45-V Operating Voltage
1.25-A and 1-A Peak Gate Drive Currents
Smart Gate Drive Architecture (IDRIVE & TDRIVE)
Programmable High- and Low-Side Slew-Rate Control
Charge-Pump Gate Driver for 100% Duty Cycle
Three Integrated Current-Shunt Amplifiers
Integrated 50-mA LDO (3.3-V and 5-V Option)
3-PWM or 6-PWM Input Control up to 200 kHz
Single PWM-Mode Commutation Capability
Serial Peripheral Interface (SPI) for Device Settings and Fault Reporting
Thermally-Enhanced 48-Pin HTQFP
Protection Features:
Fault Diagnostics and MCU Watchdog
Programmable Dead-Time Control
MOSFET Shoot-Through Prevention
MOSFET VDS Overcurrent Monitors
Gate-Driver Fault Detection
Reverse Battery-Protection Support
Limp Home-Mode Support
Overtemperature Warning and Shutdown
DRV8305-Q1 application:
Three-Phase BLDC and PMSM Motors
Automotive Fuel and Water Pumps
Automotive Fans and Blowers
Figure 1. Functional Block Diagram of DRV8305-Q1
Figure 2. Typical application circuit diagram of DRV8305-Q1
DRV8305-Q1EVM automotive three-phase motor gate drive evaluation module
The DRV8305-Q1EVM evaluation module (EVM) is a 4.4 V to 45 V, 25 A, 3-phase motor drive and control system based on the DRV8305-Q1 automotive motor gate driver, TMS320F28027 motor control microcontroller, and CSD18540Q5B NexFETTM power MOSFET The EVM allows for simple evaluation of the DRV8305-Q1 with a wide array of test points, interfaces, and configurability.
The EVM has onboard reverse battery protection, a regulated 3.3 V supply from the TPS7B6933-Q1 LDO, interface header for all control and feedback signals , and onboard XDS100v2 emulator. The EVM has individual DC bus and phase voltage sense as well as individual low- Side drive shunt sense for sensorless BLDC control algorithms. The drive stage is fully protected with short circuit, thermal, shoot-through, and undervoltage protection and is easily configurable via an SPI interface.
The EVM is ideal for evaluation and rapidly developing with the DRV8305-Q1, with primary software support through MotorWare using the InstaSPIN-FOC sensorless control solution.
Figure 3. Outline drawing of the DRV8305-Q1EVM
Main features of DRV8305-Q1EVM:
4.4 V to 45 V Operating Supply Voltage Range
Supports up to 25 A Continuous Output Current
Provides Phase Voltage and Current Feedback ForSensorless BLDC Control Solutions
Complete Brushless DC Control and Drive Stage
Onboard XDS100v2 Emulator
What's Included
DRV8305-Q1 Evaluation Board
Micro-USB Cable
Figure 4. DRV8305-Q1EVM block diagram
Figure 5. DRV8305-Q1EVM circuit diagram (1)
Figure 6. DRV8305-Q1EVM circuit diagram (2): MCU DRV
Figure 7. DRV8305-Q1EVM circuit diagram (3): power supply
Figure 8. DRV8305-Q1EVM circuit diagram (4): bridge
DRV8305-Q1EVM Bill of Materials:
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