Features
- Operating power supply voltage:
- VBRIDGE: 6V to 65V (78V abs max)
- Voltage max (VM): 6V to 60V (65V abs max)
- Operating ambient temperature: -40 °C to 125 °C
- 3-Phase gate drivers for BLDC applications
- Switching frequency range up to 200kHz
- Peak 0.64A/1.28A source/sink current with 16 adjustable drive strength through SPI interface
- Adaptive and adjustable dead time
- Flexible configuration for gate driver
- 3-phase HI/LI mode and 3-phase PWM mode
- Input control signal configuration
- Support half-bridge, full-bridge configuration
- Fully integrated power supply architecture
- Two VCC LDOs allow for Sleep mode low IQ
- 500mA buck switching regulator generates drive voltage (5V to 15V adjustable)
- 100mA adjustable output LDO for MCU supplies (3.3V to 5V adjustable)
- Three accurate differential amplifiers
- Four levels of sense gain setting
- Supports DC offset calibration during power-up and on-the-fly
- BEMF sense amplifier for sensorless motor drive
- Three comparators for hall sensor motor drive
- Integrated protection features
- 7mm x 7mm 48 Ld QFN package (0.5mm pitch)
Description
The RAA306012 is a smart gate driver for 3-phase brushless DC (BLDC) motor applications. It integrates three half-bridge gate drivers that are capable of driving up to three N-channel MOSFET bridges and supports bridge voltages from 6V to 65V. Each gate driver supports up to 0.64A source and 1.28A sink peak drive current with adjustable drive strength control. Adaptive and adjustable dead times are implemented to ensure robustness and flexibility. The active gate holding mechanism prevents Miller effect induced cross-conduction and further enhances robustness.
The device integrates power supplies that power internal analog and logic circuitry, high-side/low-side gate drivers, and a dedicated supply for powering external microcontrollers. The RAA306012 also features a low-power sleep mode that consumes only 28μA to maximize battery life in portable applications.
Parameters
| Attributes | Value |
|---|---|
| Function | 3 Phase BLDC Driver |
| Input Voltage Range (V) | - |
| Input Voltage (Max) (V) | 78 |
| VBIAS (Max) (V) | 65 |
| Quiescent Current | 20 µA |
| ISOURCE (Max) (mA) | 640 |
| ISINK (Max) (mA) | 1280 |
| Internal Buck Regulator | Buck 500mA |
| Gate Drive (V) | 15 |
| Internal Auxiliary Power | LDO (5V or 3.3V) 100mA |
| Adaptive Dead Time | Yes |
| VOUT Slew-rate Control | Yes |
| Charge Pump | Yes |
| Intern Gain Amplifiers | 3 |
| Internal Sample & Hold | Yes |
| Input Control | HI/LI or PWM |
| Input Logic Level | 1.5V/TTL |
| Advanced Fault Protection | Yes |
| Qualification Level | Standard |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| QFN | 7.0 x 7.0 x 0.75 | 48 | 0.5 |
Application Block Diagrams
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Cordless Leaf Blower
20V cordless leaf blower features adjustable speeds, a smart motor, a rechargeable battery, and a versatile design.
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Cordless Vacuum Cleaner
BLDC motors power efficient, versatile tools from vacuums to fans, featuring smart control and long life.
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Industrial Electronic Valve Control
Industrial electronic valve to offer precise, SIL2-compliant control.
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Additional Applications
- Cordless power tools
- Outdoor power equipment
- Vacuum cleaners
- Fans
- Pumps
- Robotics
- Medical equipment
- Industrial motor drives