TI公司三个高精度半桥驱动器 / 开普饭

[导读]TI公司的DRV8305-Q1是三相马达驱动的栅极驱动集成电路,提供三个高精度半桥驱动器,每个可驱动高边和低边N-MOSFET,电荷泵驱动器支持100%占空比,满足汽车应用的AEC-Q100规范

TI公司的DRV8305-Q1是三相马达驱动的栅极驱动集成电路,提供三个高精度半桥驱动器,每个可驱动高边和低边N-MOSFET,电荷泵驱动器支持100%占空比,满足汽车应用的AEC-Q100规范,4.4V-45V工作电压,峰值栅极驱动电流1.25A和1A,主要用在三相BLDC和PMSM马达,汽车油泵和水泵,汽车风扇和鼓风机.本文介绍了DRV8305-Q1主要特性,框图,典型应用电路以及汽车两轴电动座椅驱动参考设计TIDA-01330主要特性,框图,电路图,材料清单和PCB设计图.

The DRV8305-Q1 device is a gate driver IC for threephasemotor-drive applicaTIons. The device providesthree high-accuracy half-bridge drivers, each capableof driving a high-side and low-side N-channelMOSFET. 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 voltageregulator 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 gate driver uses automatic handshaking whenswitching to prevent current shoot through. The VDSof both the high-side and low-side MOSFETs isaccurately sensed to protect the external MOSFETsfrom overcurrent conditions. The SPI providesdetailed fault reporting, diagnostics, and deviceconfigurations such as gain options for the currentshunt amplifier, individual MOSFET overcurrentdetection, and gate-drive slew-rate control.

DRV8305-Q1主要特性:

1· AEC-Q100 Qualified for Automotive Applications

· Ambient Operating Temperature Ranges:

– Temperature Grade 0 (E): –40℃ to 150℃

– Temperature Grade 1 (Q): –40℃ to 125℃

· 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应用:

· Three-Phase BLDC and PMSM Motors

· Automotive Fuel and Water Pumps

· Automotive Fans and Blowers

图1.DRV8305-Q1框图

图2.DRV8305-Q1典型应用电路

汽车两轴电动座椅驱动参考设计TIDA-01330

The TIDA-01330 design implements the drive circuitsfor two independent brushed DC motors. It provides asolution for automotive power seats with a highlyintegratedtwo-axis driver, reducing the overall bill ofmaterials. The interface to a simple microcontrollerIllustrates 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 circuitsand other diagnostic features to ensure reliableoperation and detection of faults. Additionally thecontrol circuit for an LED illumination element isimplemented, as well as the feasibility of providingtactile feedback to the seat occupant by vibrating ineither axis.

参考设计TIDA-01330主要特性:

· 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

参考设计TIDA-01330应用:

· Power Seat Height and Forward and BackwardAdjustment

· Power Seat Back Recline Adjustment andPower Fold