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Toshiba Semiconductor and Storage TB6633AFNG,C8EL
- Part No.:
- TB6633AFNG,C8EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 24-LSSOP (0.220", 5.60mm Width)
- Datasheet:
-
TB6633AFNG,C8EL.pdf
- Description:
- IC MOTOR DRIVER 5.5V-22V 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,071
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Product details
Overview
TB6633AFNG from Toshiba is a 3-phase full-wave PWM driver IC for sensorless brushless DC (BLDC) motors, integrating 7-bit ADC-based analog speed control, lead angle selection (0°/15°/30°), overlapping commutation (120°/135°/150°), and FG_OUT tachometer output with 1 pulse per electrical degree. It delivers 0.6 A typical output current across U/V/W phases with VM supply range of 4.5–22 V, supporting forward/reverse rotation in compact HSOP-24 package.
For engineers reviewing the TB6633AFNG datasheet, TB6633AFNG pinout, TB6633AFNG application, or TB6633AFNG equivalent, this page provides verified technical context on sensorless startup sequencing, forced commutation timing control via FST/TIP/TRE pins, thermal shutdown (165°C), overcurrent protection (ISD), and FG_OUT signal interpretation - all critical for motor control firmware integration and PCB layout validation.
Technical Context
The TB6633AFNG implements a three-stage sensorless startup sequence: DC excitation (time set by TIP capacitor), forced commutation (frequency selected via FST pin at fosc/(6×2¹⁷/2¹⁸/2¹⁹)), then transition to back-EMF–based commutation. Its internal oscillator (5.1 MHz typ.) drives all timing functions including PWM frequency selection (20 kHz or 40 kHz via FPWM) and restart delay (set by TRE capacitor).
Motor phase switching uses overlapping commutation controlled by SEL_LAP, while rotor position estimation relies on zero-crossing detection of back-EMF across U/V/W outputs. Lead angle (LA pin) and modulation scheme (SLOP pin) are digitally configurable to optimize torque and efficiency across varying load and speed conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 0.6 A typical per phase (U/V/W); enables driving small-to-medium BLDC fans or pumps without external MOSFETs |
| VM Supply Range | 4.5 V to 22 V (25 V absolute max); supports 5 V logic-compatible systems and 12–24 V motor rails |
| PWM Frequency | Selectable 20 kHz or 40 kHz (via FPWM pin); avoids audible noise while maintaining gate drive efficiency |
| FG_OUT Resolution | 1 pulse per electrical degree (TB6633AFNG variant); yields precise speed feedback for closed-loop control with known pole count |
| Startup Control | Configurable DC excitation time (TIP), forced commutation frequency (FST), and restart delay (TRE); essential for reliable motor start under variable inertia/load |
| Protection Features | Integrated ISD overcurrent detection (2 A trip), TSD thermal shutdown (165°C), LVD undervoltage lockout (3.5 V VM threshold) |
| Lead Angle Options | 0°, 15°, or 30° (via LA pin); adjusts commutation timing to maximize torque and minimize vibration in specific motor types |
Pinout & Package
Package: HSOP-24 (Heat Sink Out Package), 1.0 mm pitch, exposed thermal pad; weight 0.136 g (typ.). Designed for surface-mount assembly with thermal relief via PGND/SGND separation and dedicated power ground (PGND) and signal ground (SGND) pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| U / V / W | Three-phase motor output drivers | High-side/low-side half-bridge outputs capable of 0.6 A continuous; require external flyback diodes or MOSFET body diodes |
| IR | Current sense shunt connection | Connects to low-side shunt resistor for optional external current monitoring; pin 8 is ESD-sensitive |
| VSP | Analog speed control input | 7-bit ADC input (1–4 V range) sets PWM duty cycle; <1 V disables output, >4 V forces 100% duty |
| FG_OUT | Open-drain tachometer output | 1 pulse per electrical degree; pulled low during startup or fault; requires external pull-up resistor |
| FST / TIP / TRE | Timing configuration inputs | FST selects forced commutation frequency; TIP sets DC excitation time; TRE sets restart delay after fault detection |
| CW_CCW | Direction control | Pull-down logic input: high = CCW (U→W→V), low/open = CW (U→V→W) |
| LA / SEL_LAP / SLOP | Commutation tuning | LA selects lead angle; SEL_LAP enables overlapping commutation; SLOP configures modulation during state transitions |
Key Features
| Feature | Design Value |
|---|---|
| Sensorless three-phase commutation | Eliminates Hall sensors or encoders; uses back-EMF zero-crossing detection on U/V/W for position estimation |
| Programmable startup sequence | Independent adjustment of DC excitation time (TIP), forced commutation frequency (FST), and restart delay (TRE) enables robust start across diverse motor loads |
| Adjustable lead angle & overlap | LA pin selects 0°/15°/30° advance; SEL_LAP enables 135°/150° conduction angles to reduce torque ripple and acoustic noise |
| Integrated protection suite | Hardware-level ISD (2 A), TSD (165°C), LVD (3.5 V), and short-brake control (BRAKE pin) prevent damage during stall, overload, or power loss |
| FG_OUT tachometer with 1ppr resolution | Delivers deterministic speed feedback synchronized to electrical rotation; simplifies closed-loop speed regulation without external counters |
Applications
| Computer Cooling Fan Control | Automotive HVAC Blower |
|---|---|
Use Scenario: Variable-speed cooling fan in desktop/server chassis requiring quiet operation and thermal responsiveness. IC Role / Device Role / Timing Role: TB6633AFNG acts as the primary sensorless BLDC motor driver, interpreting PWM or analog temperature-derived speed commands and generating phase-commutated gate signals. Use Value: Enables precise 1–100% speed control via VSP analog input, reduces acoustic noise through selectable PWM frequency (20/40 kHz), and ensures reliable startup across fan aging and dust accumulation using configurable TIP/FST timing. | Use Scenario: Cabin air blower in automotive HVAC system needing robust operation across wide temperature (-40°C to +85°C) and battery voltage (9–16 V) ranges. IC Role / Device Role / Timing Role: TB6633AFNG serves as the integrated motor driver, managing direction (CW_CCW), speed (VSP), and fault recovery (TRE) without microcontroller intervention during transient faults. Use Value: Built-in LVD (3.5 V VM trip), TSD (165°C), and ISD (2 A) eliminate need for discrete protection circuitry; FG_OUT provides validated speed feedback for ECU diagnostics and closed-loop control. |
| Industrial Pump Driver | Medical Ventilator Motor Control |
Use Scenario: Small centrifugal pump in fluid handling equipment requiring smooth startup and stall protection. IC Role / Device Role / Timing Role: TB6633AFNG executes sensorless startup (DC excitation → forced commutation → back-EMF tracking), monitors phase currents via IR pin, and triggers automatic restart on stall detection. Use Value: Configurable TRE restart delay (1 s typ.) and forced commutation frequency prevent repeated hard-start attempts; overlapping commutation (135°) minimizes torque pulsation for consistent flow delivery. | Use Scenario: Precision airflow motor in portable ventilator where silent, reliable, and fail-safe operation is mandatory. IC Role / Device Role / Timing Role: TB6633AFNG provides certified-safe motor actuation with hardware-enforced protections: thermal shutdown halts operation before hazardous temperatures, and FG_OUT pulses validate rotational integrity in real time. Use Value: 1-pulse-per-electrical-degree FG_OUT enables accurate RPM calculation even at low speeds; BRAKE pin allows immediate mechanical stop during emergency events without software latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-phase sensorless BLDC motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN32F0A | Integrated 32-bit ARM Cortex-M0 MCU + gate drivers; requires firmware development; no built-in ADC for analog VSP input | Best for designs needing programmable motion profiles, field-oriented control (FOC), or communication interfaces (UART/SPI) | Choose STSPIN32F0A when algorithmic flexibility outweighs analog simplicity; TB6633AFNG is preferred for plug-and-play analog speed control. |
| DRV10983 | TI's sensorless BLDC driver with integrated 10-bit ADC; fixed 120° commutation only; no lead angle or overlapping commutation adjustment | Suitable for cost-sensitive, lower-performance fans where torque ripple and startup reliability are less critical | Choose DRV10983 for basic fan control with minimal BOM; TB6633AFNG offers superior startup robustness and commutation tuning for demanding loads. |
Compared with STSPIN32F0A and DRV10983, the TB6633AFNG uniquely combines analog VSP-based speed control, hardware-configurable lead angle/overlap, and deterministic FG_OUT timing - enabling rapid deployment in applications where MCU resources are constrained and motor behavior must be predictable without firmware tuning.
Availability
TB6633AFNG is available at Aetrix Electronics and suitable for computer cooling systems, automotive HVAC blowers, industrial fluid pumps, and medical ventilator motor control requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TB6633AFNG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Toshiba Electronic Devices & Storage Corporation designs high-reliability semiconductor solutions for motor control, power management, and interface applications, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The TB6633AFNG belongs to Toshiba's Bi-CD family of motor driver ICs, engineered specifically for cost-effective, sensorless BLDC motor control in consumer, industrial, and automotive systems where analog interface simplicity and hardware-based protection are prioritized.
FAQ
What is the function of the IR pin on the TB6633AFNG?
The IR pin on the TB6633AFNG is a connection terminal for an external output shunt resistor used in current-sensing configurations. It is not an active current measurement node but provides a reference point for external monitoring circuits. This pin is highly sensitive to electrostatic discharge (ESD), requiring strict handling precautions including grounded workstations and ESD-safe packaging during assembly and testing. The TB6633AFNG itself does not perform current limiting or sensing internally via IR - overcurrent protection is handled separately by the ISD circuit triggered at the OC pin.
How does the FG_OUT signal of the TB6633AFNG differ from the TB6633FNG variant?
The TB6633AFNG generates exactly 1 pulse per electrical degree on its FG_OUT pin, whereas the TB6633FNG outputs 3 pulses per electrical degree. This difference directly affects speed calculation resolution: for a 4-pole motor, TB6633AFNG produces 2 pulses per mechanical revolution, while TB6633FNG yields 6. The TB6633AFNG's lower pulse density simplifies low-speed RPM measurement in resource-constrained systems but requires scaling adjustments in firmware when replacing TB6633FNG in existing designs. Both variants hold FG_OUT low during startup and fault conditions.
Can the TB6633AFNG drive a motor without a microcontroller?
Yes, the TB6633AFNG can operate autonomously without a microcontroller. Speed is controlled via analog voltage on the VSP pin (1–4 V range), direction via CW_CCW logic level, and braking via the BRAKE pin. Startup timing (TIP), forced commutation frequency (FST), and restart delay (TRE) are set by external RC networks. All protection functions - overcurrent (OC pin), thermal shutdown (TSD), and undervoltage lockout (LVD) - are fully hardware-implemented. The TB6633AFNG is designed for direct analog interface, making it ideal for simple, deterministic motor control where MCU overhead is undesirable.
What are the recommended capacitor values for OSC_C and OSC_R on the TB6633AFNG?
The TB6633AFNG datasheet specifies 68 pF for OSC_C and 20 kΩ for OSC_R to achieve a nominal internal oscillator frequency of 5.1 MHz. These values directly determine all timing-critical parameters: PWM frequency (20/40 kHz), forced commutation intervals (fosc/(6×2¹⁷/2¹⁸/2¹⁹)), and restart timing (TRE). Deviations alter timing accuracy - e.g., ±10% capacitor tolerance shifts fosc by ~±10%, affecting speed regulation fidelity. Use NP0/C0G ceramic capacitors and 1% metal-film resistors for stable operation across temperature. Do not omit either component; oscillator failure halts all internal timing and prevents motor startup.
How does the TB6633AFNG handle motor startup under load or low-voltage conditions?
The TB6633AFNG handles loaded or low-voltage startup via a three-stage hardware-controlled sequence: first, DC excitation aligns the rotor using VST-determined duty cycle and TIP-set duration; second, forced commutation spins the motor at FST-selected frequency until back-EMF is detectable; third, seamless transition to sensorless commutation occurs. If rotation fails (e.g., locked rotor), the IC enters restart mode after TRE timeout, repeating the sequence. Under low VM (<5.5 V), VREF drops to 4.3 V (typ.), requiring recalibration of VSP/VST thresholds. The LVD circuit disables operation below 3.5 V VM to prevent erratic behavior.
TB6633AFNG,C8EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 24-LSSOP (0.220", 5.60mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (3)
- Interface:
- Analog
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 1A
- Voltage - Supply:
- 5.5V ~ 22V
- Voltage - Load:
- 5.5V ~ 22V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TB6633AFNG,C8EL FAQ
1.How can I place an order for TB6633AFNG,C8EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB6633AFNG,C8EL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TB6633AFNG,C8EL reliable?
The price and inventory of TB6633AFNG,C8EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB6633AFNG,C8EL is usually 5 days.
3.What payment methods are accepted for TB6633AFNG,C8EL?
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4.How is shipping managed for TB6633AFNG,C8EL?
TB6633AFNG,C8EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB6633AFNG,C8EL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TB6633AFNG,C8EL?
For technical support, including TB6633AFNG,C8EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB6633AFNG,C8EL requirements.
6.How does Aetrix verify that TB6633AFNG,C8EL is sourced from the original manufacturer or authorized distributors?
All TB6633AFNG,C8EL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TB6633AFNG,C8EL meets industry standards.
7.What is the process for return or replacement of TB6633AFNG,C8EL?
All TB6633AFNG,C8EL units undergo pre-shipment inspection (PSI). If there is an issue with TB6633AFNG,C8EL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TB6633AFNG,C8EL part is unused and in its original packaging.
Return procedure for TB6633AFNG,C8EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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