DRV8306
- 6-V to 38-V,
Triple Half-Bridge Gate Driver With Integrated 3x Hall Comparators
- 40-V Absolute Maximum Rating
- Fully Optimized for 12-V and 24-V DC Rails
- Drives High-Side and Low-Side N-Channel MOSFETs
- Supports 100% PWM Duty Cycle
- Smart Gate Drive
Architecture
- Adjustable Slew-Rate Control for Better EMI and EMC Performance
- VGS Hand-Shake and Minimum Dead-Time Insertion to Avoid Shoot-Through
- 15-mA to 150-mA Peak Source Current
- 30-mA to 300-mA Peak Sink Current
- Integrated Commutation from Hall
Sensors
- 120° Trapezoidal Current Control
- Supports Low-Cost Hall Elements
- Tacho Output Signal (FGOUT) for Closed Loop Speed Control
- Integrated Gate Driver Power
Supplies
- High-Side Charge Pump
- Low-Side Linear Regulator
- Cycle-by-Cycle Current Limit
- Supports 1.8-V, 3.3-V, and 5-V Logic Inputs
- Low-Power Sleep Mode
- Linear Voltage Regulator, 3.3 V, 30 mA
- Compact VQFN Package and Footprint
- Integrated Protection
Features
- VM Undervoltage Lockout (UVLO)
- Charge Pump Undervoltage (CPUV)
- MOSFET Overcurrent Protection (OCP)
- Gate Driver Fault (GDF)
- Thermal Shutdown (OTSD)
- Fault Condition Indicator (nFAULT)
The DRV8306 device is an integrated gate driver for 3-phase brushless DC (BLDC) motor applications. The device provides three half-bridge gate drivers, each capable of driving high-side and low-side N-channel power MOSFETs. The DRV8306 device generates the proper gate drive voltages using an integrated charge pump for the high-side MOSFETs and a linear regulator for the low-side MOSFETs. The smart gate drive architecture supports up to 150-mA source and 300-mA sink peak gate drive current and 15-mA rms gate drive current capability.
The device provides an internal 120° commutation for the trapezoidal BLDC motor. The DRV8306 device has three Hall comparators which use the input from the Hall elements for internal commutation. The duty cycle ratio of the phase voltage of the motor can be adjusted through the PWM pin. Additional brake (nBRAKE) and direction (DIR) pins are provided for braking and setting the direction of the BLDC motor. A 3.3-V, 30-mA low-dropout (LDO) regulator is provided to supply the external controller and Hall elements. An additional FGOUT signal is provided which is a measure of the commutation frequency. This signal can be used for implementing the closed-loop control of BLDC motor.
A low-power sleep mode is provided to achieve low quiescent current draw by shutting down most of the internal circuitry. Internal protection functions are provided for undervoltage lockout, charge pump fault, MOSFET overcurrent, MOSFET short circuit, gate driver fault, and overtemperature. Fault conditions are indicated on the nFAULT pin.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | DRV8306 38-V Brushless DC Motor Controller datasheet (Rev. A) | PDF | HTML | 2018/7/9 | ||
| Application brief | Brushless-DC Made Simple – Sensored Motor Control (Rev. C) | PDF | HTML | 2026/3/11 | |||
| 應用說明 | Best Practices for Board Layout of Motor Drivers (Rev. B) | PDF | HTML | 2021/10/14 | |||
| 應用說明 | System Design Considerations for High-Power Motor Driver Applications | PDF | HTML | 2021/6/22 | |||
| Application brief | Low Voltage Motor Drive Operation With Smart Gate Drive | 2018/12/20 | ||||
| 應用說明 | Cut-Off Switch in High-Current Motor-Drive Applications (Rev. A) | 2018/8/20 |
設計與開發
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DRV8306EVM — DRV8306 三相馬達智慧型閘極驅動器評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RSM) | 32 | Ultra Librarian |