TI DRV8306：3.5H桥智能门极驱动器，6-38V PWM控制与集成保护功能

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TI-DRV8306是一款高性能的3.5-HBridge智能门极驱动器，专为6至38伏的直流应用设计，如无刷电机控制系统。该产品具有以下关键特性： 1. **宽电压范围**：DRV8306支持从6V到38V的工作电压，适用于多种直流电源轨，特别适合12V和24V的应用场景。 2. **集成霍尔传感器**：内置3个霍尔比较器，用于精确检测磁场，有助于换向控制和电机速度检测，支持120°梯形电流控制，适应低成本霍尔元件。 3. **智能驱动技术**：采用可调压摆率控制，改善电磁兼容（EMI）性能，通过VGS握手和最小死区时间防止过电压击穿。驱动器还支持100% PWM占空比，实现灵活的脉宽调制控制。 4. **峰值电流能力**：驱动器提供15mA至150mA的峰值拉电流和30mA至300mA的峰值灌电流，满足高电流负载需求。 5. **电源管理**：集成有高侧电荷泵和低侧线性稳压器，为驱动器本身和外部电路提供稳定的电源。同时，还有3.3V、30mA线性稳压器，支持低功耗睡眠模式。 6. **保护功能**：集成有多个保护机制，包括VM欠压闭锁（UVLO）、电荷泵欠压（CPUV）、MOSFET过流保护（OCP）、栅极驱动器故障（GDF）以及热关断（OTS），确保系统安全运行。 7. **接口兼容性**：支持1.8V、3.3V和5V逻辑输入，便于与各种微控制器通信。 8. **封装与尺寸**：采用紧凑的VQFN封装，节省空间，适合于小型化和板级设计。 9. **安全性**：最后提到的重要注意事项包括关于可用性、保修、在安全关键应用中的使用、知识产权声明以及生产数据的更新和免责声明，确保用户了解产品的最新信息和适用条件。 TI-DRV8306是一款高度集成且具备智能控制的驱动器，适用于对电流控制精度要求较高的直流电机驱动应用，其强大的功能和全面的保护特性使其在工业自动化、电动车辆和其他高电压、大电流场合表现出色。

Load Current (mA)

VCP Voltage (V)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D007

= 6 V

= 8 V

= 10 V

= 12 V

Temperature (qC)

VCP Voltage (V)

-40 -20 0 20 40 60 80 100 120 140

D008

= 6 V

= 8 V

= 10 V

= 12 V

DRV8306

www.ti.com.cn

ZHCSHZ0A –APRIL 2018–REVISED JULY 2018

Typical Characteristics (接接下下页页)

图图 7. VCP Voltage Over Load 图图 8. VCP Voltage Over Temperature

DRV8306

ZHCSHZ0A –APRIL 2018–REVISED JULY 2018

www.ti.com.cn

7 Detailed Description

7.1 Overview

The DRV8306 device is an integrated 6-V to 38-V gate driver for three-phase motor-drive applications. The

device reduces system component count, cost, and complexity by integrating three independent half-bridge gate

drivers, charge pump, and linear low-dropout (LDO) regulator for the high-side and low-side gate-driver supply

voltages. A hardware interface (H/W) option allows for configuring the most commonly used settings through

fixed external resistors.

The gate drivers support external N-channel high-side and low-side power MOSFETs and can drive up to 150-

mA source and 300-mA sink peak currents with a 15-mA average output current. The high-side gate drive supply

voltage is generated using a doubler charge-pump architecture that regulates the VCP output to V

+ 10 V. The

low-side gate drive supply voltage is generated using a linear regulator from the VM power supply that regulates

to 10 V. A smart gate-drive architecture provides the ability to adjust the output gate-drive current strength

allowing for the gate driver to control the power MOSFET V

switching speed. This allows for the removal of

external gate drive resistors and diodes reducing BOM component count, cost, and PCB area. The architecture

also uses an internal state machine to protect against gate-drive short-circuit events, control the half-bridge dead

time, and protect against dV/dt parasitic turnon of the external power MOSFET.

The DRV8306 device also integrates three Hall comparators for rotor position sensing using the Hall elements.

This input is used for electronically commutating the BLDC motor in trapezoidal mode. This device also has a

3.3-V LDO regulator which can be powered up to loads up to 30 mA.

In addition to the high level of device integration, the DRV8306 device provides a wide range of integrated

protection features. These features include power-supply undervoltage lockout (UVLO), charge-pump

undervoltage lockout (CPUV), V

and V

SENSE

overcurrent monitoring (OCP), gate-driver short-circuit detection

(GDF), and overtemperature shutdown (OTSD). Fault events are indicated by the nFAULT pin.

The DRV8306 device is available in a 0.4-mm pin pitch, VQFN surface-mount package. The VQFN package size

is 4-mm × 4-mm.

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TI DRV8306：3.5H桥智能门极驱动器，6-38V PWM控制与集成保护功能

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