TI's DRV8305-Q1 is a three-phase motor-driven gate drive IC that provides three high-precision half-bridge drivers, each capable of driving high-side and low-side N-MOSFETs, and a charge pump driver that supports 100% duty cycle. Meets AEC-Q100 specifications for automotive applications, 4.4V-45V operating voltage, peak gate drive current 1.25A and 1A, mainly used in three-phase BLDC and PMSM motors, automotive oil pumps and pumps, automotive fans and blowers. This article describes DRV8305 -Q1 main features, block diagram, typical application circuit and automotive two-axis power seat drive reference design TIDA-01330 main features, block diagram, circuit diagram, bill of materials and PCB design.
The DRV8305-Q1 device is a gate driver IC for threephasemotor-drive applicaTIons. The device provides three high-accuracy half-bridge drivers, each capable of driving a high-side and low-side N-channel MOSFET. A charge pump driver supports 100% dutycycle And low-voltage operaTIon for cold cranksituations. The device can tolerate load dumpvoltages up to 45-V.
The DRV8305-Q1 device includes three bidirectionalcurrent-shunt amplifiers for accurate low-side currentmeasurements that support variable gain settings andan adjustable offset reference.
The DRV8305-Q1 device has an integrated voltage regulator to support an MCU or other system powerrequirements. The voltage regulator can be interfaceddirectly with a LIN physical interface to allow lowsystemstandby and sleep currents.
The VS provides detailed fault reporting, diagnostics, and deviceconfigurations such as gain options for The currentshunt amplifier, individual MOSFET overcurrentdetection, and gate-drive slew-rate control.
Main features of DRV8305-Q1:
1• 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-RateControl
• 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 DeviceSettings 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. Block diagram of DRV8305-Q1
Figure 2. Typical application circuit for the DRV8305-Q1
Automotive two-axis power seat drive reference design TIDA-01330
The TIDA-01330 design implements the drive circuits for two independent brushed DC motors. It provides a solution for automotive power seats with a highly integrated two-axis driver, reducing the overall bill of materialss. The interface to a simple fixtureIllustrates how the design reduces the processingburden on the control Software.
In addition to the drive circuit for two motors, this TIDesign also includes current feedback sense circuits and other diagnostic features to ensure reliable operation and detection of faults. Additionally the control circuit for an LED illumination element isimplemented, as well as the feasibility of providingtactile feedback to the seat Occupant by vibrating ineither axis.
Reference design TIDA-01330 main features:
• Drives Two Independent Brushed DC Motors
• Up to 10-A Motor Current (Each Axis)
• Current Feedback on Each Axis
• Reverse Battery Protection
• Low-Pass Filtering on Battery Power
• Drives LED for Floor Illumination
• Simple Microcontroller Interface
• Reduced Bill of Materials
Reference Design TIDA-01330 Application:
• Power Seat Height and Forward and BackwardAdjustment
• Power Seat Back Recline Adjustment and Power Fold
• Other Two-Axis Brushed DC Motor Drives
Figure 3. Outline design of the TIDA-01330 reference design
Reference design TIDA-01330 main indicators:
Figure 4. Block diagram of the reference design TIDA-01330
Figure 5. Reference design TIDA-01330 extended to five-axis application diagram
Figure 6. Reference Design TIDA-01330 Circuit Diagram
Refer to the design TIDA-01330 bill of materials:
Figure 7. Reference Design TIDA-01330 PCB Design Drawing (1)
Figure 8. Reference Design TIDA-01330 PCB Design Drawing (2)
Figure 9. Reference Design TIDA-01330 PCB Design Drawing (3)
Figure 10. Reference Design TIDA-01330 PCB Design Drawing (4)
Figure 11. Reference Design TIDA-01330 PCB Design Drawing (5)
Figure 12. Reference Design TIDA-01330 PCB Design Drawing (6)
Figure 13. Reference Design TIDA-01330 PCB Design Drawing (7)
Figure 14. Reference Design TIDA-01330 PCB Design Drawing (8)
Figure 15. Reference Design TIDA-01330 PCB Design Drawing (9)
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