MC121
- N-channel H-bridge driver with internal Hall sensor
- RDS(ON): 850mΩ (HS+LS)
- Current rating
- Configurable current limit up to 1.21A
- 0.6A rms (TA = 85oC, RθJA = 100oC/W)
- Integrated supply (VM) clamp
- Configurable speed curve and starting duty cycle
- Commutation schemes: square or
soft (up to 90o)
- Square: maximum torque/speed
- Soft: optimized speed and acoustics
- Configurable speed reference
input: PWM or DC
- Input PWM frequency range: 20Hz to 90kHz
- Input DC voltage range: (0-3)V
- Configurable output PWM frequency: 25 or 50kHz
- Closed loop speed control accuracy: ±3%
- PWM dithering to reduce EMI
- Configurable soft start time
- Configurable hall offset angle and time
- Speed output with 0.5x, 1x, 2/3x, or 2x multipliers
- Rotor lock detection and fault output (RD)
- Configurable PWM modes
- Hybrid, synchronous, and asynchronous
- Auto-demag for high efficiency across speed
- One-time programming (2 pages) over I2C
- Protection features
- Output Overcurrent protection with auto-restart
- Locked rotor protection (LRP) with auto-restart
- VM undervoltage lockout (UVLO)
- VM overvoltage protection (OVP)
- Thermal shutdown (TSD)
- Configurable fault retry time
- Functional features (Operation
continues)
- when FG/RD shorts GND
- when PWM/DC shorts to VM
The MC121 is a 40V, 850mΩ rated motor driver with integrated N-channel full-bridge MOSFETs, charge pump, hall sensor, commutation control logic, and protection circuitry for single phase brushless DC motors. The hall sensor provides rotor position information to the commutation logic to maintain continuous rotor motion. The commutation logic can be programmed for square and soft PWM waveforms to reduce acoustic noise or maximize speed/efficiency.
The duty cycle of a pulse-width modulated signal or a (0-3)V DC voltage on the PWM/DC pin controls the motor speed. FG/RD pin can be configured to report the motor speed, a locked rotor condition, or fault to an external controller. The PWM/DC and FG/RD pins can be also configured as an I2C interface to support a programming (OTP) mode to configure the OTP during production.
The MC121 integrates protection features for motor and device protection. These include supply undervoltage lockout, overvoltage protection, output overcurrent protection, device overtemperature shutdown, and locked rotor protection.
The MC121 is available in two 6-pin packages: SOT23-THN and X2SON. SOT23-THN is a flat lead package with a maximum height of 1.1mm. X2SON is a non-leaded package with a maximum height of 0.4mm.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | MC121 40V , Single Phase BLDC Driver with Integrated Hall Sensor データシート | PDF | HTML | 2026/10/07 | ||
| EVM ユーザー ガイド (英語) | MC121 単相 BLDC 評価基板 | PDF | HTML | 英語版 | PDF | HTML | 2025/12/29 |
設計と開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
MC121EVM — MC121 評価基板
MOTORSTUDIO-1PHASE-GUI — GUI for Single phase BLDC driver
MOTORSTUDIO-GUI — Motor Studio GUI for tuning and evaluating BLDC motor drivers
Motor Studio は、TI のブラシレス DC (BLDC) モーター ドライバのチューニング プロセスを簡素化し、デバイスの評価と製品開発期間の短縮に貢献する、使いやすいグラフィカル ユーザー インターフェイス (GUI) です。GUI を使用すると、モーターを短期間で動作させ、モーター動作のさまざまな段階を最適化して、最高クラスのモーター性能、安定したモーター起動、最小のノイズを実現するのが容易になります。
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| X2SON (DEZ) | 6 | Ultra Librarian |