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

• Other Two-Axis Brushed DC Motor Drives

drv8305-Q1

具有三个集成分流放大器的汽车类三相栅极驱动器

描述

DRV8305-Q1 是一款适用于三相电机驱动应用的栅极驱动器集成 电路 (IC) 器件。该器件提供了三个高精度半桥驱动器，每个驱动器能够驱动一个高侧和低侧 N 沟道 MOSFET。电荷泵驱动器支持占空比为 100% 的低压操作，适用于冷启动条件。该器件最高可耐受 45V 负载突降电压。

DRV8305-Q1 器件具备三个双向分流放大器，支持可变增益设置和可调节偏移基准，可精确测量低侧电流。

DRV8305-Q1 器件具有一个集成稳压器，可满足微控制器 (MCU) 或其他系统的电源要求。稳压器可与 LIN 物理接口直接相连，支持低功耗系统待机和休眠模式。

栅极驱动器在切换时使用自动握手，以防止发生电流击穿。可精确感测高侧和低侧 MOSFET 的 VDS，从而防止外部 MOSFET 出现过流情况。SPI 提供详细的故障报告、诊断和器件配置，例如分流放大器的增益选项、独立的 MOSFET 过流检测和栅极驱动转换率控制。

器件选项：

DRV8305NQ：1 级，带有电压基准 DRV83053Q：1 级，带有 3.3V、50mA LDO DRV83055Q：1 级，带有 5V、50mA LDO DRV8305NE：0 级，带有电压基准

特性

符合汽车类应用的 AEC-Q100 标准

工作环境温度范围：

温度等级 0 (E)：-40°C 至 150°C

温度等级 1 (Q)：-40°C 至 125°C

4.4V 至 45V 工作电压范围

参数 与其它产品相比 无刷直流栅极驱动器

Vs (Min) (V)：4.4

Vs (Max) (V)：45

Gate Drive (A)：1

Number of Half Bridges：3

Current Sense Amps：3

Control I/F：PWM (6x/3x/1x)

Additional Features：SPI Management I/F

Rating：Automotive

Operating Temperature Range (C)：-40 to 125，-40 to 150

Pin/Package：48HTQFP

DRV8305-Q1.pdf

图3.参考设计TIDA-01330外形图

参考设计TIDA-01330主要指标:

图4.参考设计TIDA-01330框图

图5.参考设计TIDA-01330扩展到五轴应用图

图6.参考设计TIDA-01330电路图

参考设计TIDA-01330材料清单:

图7.参考设计TIDA-01330 PCB设计图(1)

图8.参考设计TIDA-01330 PCB设计图(2)

图9.参考设计TIDA-01330 PCB设计图(3)

图10.参考设计TIDA-01330 PCB设计图(4)

图11.参考设计TIDA-01330 PCB设计图(5)

图12.参考设计TIDA-01330 PCB设计图(6)

图13.参考设计TIDA-01330 PCB设计图(7)

图14.参考设计TIDA-01330 PCB设计图(8)

图15.参考设计TIDA-01330 PCB设计图(9)