MCF8315A
- Three-phase BLDC motor driver with integrated sensorless motor control algorithm
- Code-free Field Oriented Control (FOC)
- Analog, PWM and freq. based speed input modes: available only when MCF8315A is configured as a standby device (DEV_MODE = 0b)
- I 2C based speed input mode: available in both sleep (DEV_MODE = 1b) and standby devices (DEV_MODE = 0b).
- Offline motor parameters measurement with Motor Parameter Extraction Tool (MPET)
- 5-point configurable speed profile support
- Windmilling support through forward resynchronization and reverse drive
- Anti-voltage surge (AVS) protection
- Improved acoustic performance with automatic dead time compensation
- 4.5- to 35-V operating voltage (40-V abs max)
- High output current capability: 4-A peak
- Low MOSFET on-state resistance
- R DS(ON) (HS + LS) at T A = 25°C : 240-mΩ (typ.)
- Low power sleep mode : Refer
- 5-µA (maximum) at V VM = 24-V, T A = 25°C
- Speed loop accuracy: 3% with internal clock and 1% with external clock reference
- Supports up to 75-kHz PWM frequency for low inductance motor support
- Does not require external current sense resistors; uses built-in current sensing
- Built-in 3.3-V, 20-mA LDO regulator
- Built-in 3.3-V/5-V, 170-mA buck regulator
- Dedicated DRVOFF pin to disable (Hi-Z) outputs
- Spread spectrum and slew rate for EMI mitigation
- Suite of integrated protection features
- Supply under voltage lockout (UVLO)
- Supply over voltage protection (OVP)
- Motor lock detection (5 different types)
- Over current protection (OCP)
- Thermal warning and shutdown (OTW/TSD)
- Fault condition indication pin (nFAULT)
- Optional fault diagnostics over I 2C interface
The MCF8315A provides a single-chip, code-free sensorless FOC solution for customers driving speed-controlled 12- to 24-V brushless-DC motors (BLDC) or Permanent Magnet Synchronous motor (PMSM) up to 4-A peak current. The MCF8315A integrates three ½-bridges with 40-V absolute maximum capability and a low R DS(ON) of 240 mΩ (high-side + low-side FETs). MCF8315A integrates power management circuits including an voltage-adjustable buck regulator (3.3 V / 5 V, 170-mA) and LDO (3.3 V / 20 mA) that can be used to power external circuits.
The FOC algorithm configuration can be stored in non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The device receives a speed command through a PWM input, analog voltage, variable frequency square wave or I 2C command. There are a large number of protection features integrated into the MCF8315A, intended to protect the device, motor, and system against fault events.
Documentation for reference:
- Refer MCF8315A tuning guide
- Refer to the MCF8315A EVM GUI
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設計與開發
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MCF8315EVM — 適用三相無感測器 FOC 整合式 MOSFET BLDC 馬達驅動器的 MCF8315 評估模組
MCF8315 有三個半全橋整合式 MOSFET 驅動器，適用 4.5V 至 35V、5-A 尖峰電流驅動之三相無刷 DC (BLDC) 馬達的無感測器 FOC 控制。MCx8315 整合降壓穩壓器，可透過可編程穩壓電源支援 200mA。
此 EVM 包括板載 MSP430 (MSP430FR2355)，可用做與 Motor Studio (MOTORSTUDIO) GUI 連接的介面。
MOTORSTUDIO — Motor Studio GUI for tuning and evaluating BLDC motor drivers
Motor Studio 是簡易型圖形使用者介面 (GUI)，可簡化無刷 DC (BLDC) 馬達驅動器的調節程序，縮減裝置評估及產品開發時間。GUI 可讓使用者快速啟動馬達，並將各種馬達運轉階段最佳化，以達到最高馬達性能，穩定馬達啟動與最低雜訊。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGF) | 40 | Ultra Librarian |