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Toshiba Semiconductor and Storage TC78B027FTG,EL
- Part No.:
- TC78B027FTG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TC78B027FTG,EL.pdf
- Description:
- 18V 3-PHASE BRUSHLESS DC (BLDC)
- Quantity:
- Payment:
- Shipping:
Inventory:2,696
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Product details
Overview
TC78B027FTG from Toshiba Electronic Devices & Storage Corporation is a 1-Hall sine-wave PWM pre-driver IC for 3-phase brushless DC motors, integrating closed-loop speed control, non-volatile memory (NVM), and six-channel N-ch MOSFET gate drivers. It operates from 9–16 V (guaranteed), supports SPI interface, and delivers up to 100 mA source / 200 mA sink per gate driver - enabling cost-effective fan motor control without external microcontrollers.
For engineers reviewing the TC78B027FTG datasheet, TC78B027FTG pinout, TC78B027FTG application, or TC78B027FTG equivalent, key selection considerations include its 1-Hall sensor architecture, configurable lead-angle compensation (InPAC), thermal shutdown at 170°C, programmable acceleration/deceleration duty limits, and QFN24 package with integrated charge pump for high-side drive.
Technical Context
The TC78B027FTG implements dual commutation modes - selectable 1-Hall sine-wave or 150° trapezoidal - via register configuration. Its internal 12 MHz oscillator feeds programmable PWM frequencies (23.4–187.5 kHz) and enables soft-start with adjustable lock-detection timing during startup.
Speed regulation uses closed-loop control based on FG pulse feedback or open-loop analog/PWM input on SPD pin; direction is set via DIR pin (50 kΩ pull-down) or register. Hall inputs (HP/HM) feature ±8 mV hysteresis and 40 mV minimum amplitude detection, while protection includes TSD, UVLO (VM/VREG/VCP), OVP (16.5–17.9 V), OCP/ISD, and lock detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor supply voltage | 9–16 V (guaranteed operation); 5–9 V supported but electrical characteristics not guaranteed |
| PWM frequency range | 23.4–187.5 kHz; selectable via PWMSEL[2:0] register and hall frequency |
| Gate drive capability | 100 mA source / 200 mA sink per channel; configurable ISOURCE_SEL/ISINK_SEL registers |
| Thermal shutdown | Triggers at 170°C (design value); releases at 130°C with 40°C hysteresis |
| Serial interface | SPI-compatible (SCK up to 500 kHz); supports NVM read/write and status/normal register access |
| Hall input sensitivity | Detects ≥40 mV differential signal with ±8 mV hysteresis; common-mode range 0.1–(VREG−2.0) V |
| Speed command input | SPD pin accepts 1–100 kHz PWM or 1.5–4.1 V analog voltage (10-bit ADC resolution) |
Pinout & Package
TC78B027FTG is housed in a 4 mm × 4 mm, 0.5 mm pitch QFN24 package with exposed thermal pad (EP). Pin 1 is located at top-left corner (HP), and pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ALERT) | Open-drain fault indicator / SPI data output | Asserts low on TSD, lock, ISD, or VCP undervoltage; shares SDO function in SPI mode |
| 2 (FG) | Open-drain tachometer output / SPI bidirectional I/O | Outputs motor RPM pulses (frequency proportional to speed); doubles as SDI/SIO in serial mode |
| 3 (VREG) | 5 V LDO regulator output | Supplies 4.5–5.5 V @ ≤10 mA; powers external Hall sensors or logic; disabled in standby |
| 4 (SPD) | Speed command input / SPI clock | Accepts PWM or analog voltage for speed setting; also serves as SCK input for SPI communication |
| 5 (DIR) | Direction control input | Active-high signal (2.0–5.5 V) with 50 kΩ internal pull-down; overrides register-defined direction |
| 6 (BRAKE) | Brake command input | Active-high (2.0–5.5 V) with 50 kΩ pull-down; initiates fast stop sequence when asserted |
| 7 (HP), 8 (HM) | Differential Hall sensor inputs | Accept 40 mV min. differential signal; support 1-Hall position sensing with ±8 mV hysteresis |
| 12 (GLU), 14 (GHU), 15 (GLV), 17 (GHV), 18 (GLW), 20 (GHW) | N-ch MOSFET gate drivers | Drive low-side (GLx) and high-side (GHx) gates; GHx outputs swing to VM+8 V (typ.), GLx to ~8 V |
| 13 (OUT-U), 16 (OUT-V), 19 (OUT-W) | Motor phase feedback inputs | Monitor back-EMF for commutation timing; connect directly to motor U/V/W terminals |
| 10 (OC) | Current sense input | Monitors voltage across external shunt resistor; triggers OCP/ISD at 0.1–0.3 V (configurable thresholds) |
| 21 (VM) | Main motor power supply | Input for 9–16 V motor bus; powers internal circuitry and charge pump; absolute max 18 V |
| 22 (VCP), 23 (CPP), 24 (CPM) | Charge pump terminals | VCP connects to capacitor bank; CPP/CPM form flying-capacitor network to generate VM+8 V for high-side drive |
Key Features
| Feature | Design Value |
|---|---|
| 1-Hall sine-wave commutation | Enables precise torque control and low acoustic noise in BLDC fans using single Hall sensor |
| Closed-loop speed control | Self-contained PI-based regulation using FG feedback; eliminates need for external MCU or PID hardware |
| InPAC lead-angle optimization | Automatically adjusts commutation timing by correlating Hall zero-cross and motor current zero-cross |
| Configurable acceleration/deceleration | Seven-step duty-change limit (Δduty/2.7 ms) prevents mechanical shock and current surge during transients |
| Integrated charge pump | Generates VM+8 V gate drive for high-side N-MOSFETs without external bootstrap components or diodes |
| Non-volatile memory (NVM) | Stores 10 program/erase cycles of user-configured parameters (e.g., PWMSEL, LATABLE, DUTYCHGLIMIT) |
Applications
| Server Fan Control | Data Center Cooling System |
|---|---|
Use Scenario: Regulating airflow in high-density 1U/2U rack servers where thermal management must respond dynamically to CPU/GPU load changes. IC Role / Device Role / Timing Role: TC78B027FTG acts as the dedicated BLDC motor pre-driver, executing real-time closed-loop speed control using FG feedback and SPD-set target RPM. Use Value: Reduces system BOM cost by eliminating MCU-based motor control firmware and external current-sense amplifiers while maintaining <±3% speed accuracy across temperature. | Use Scenario: Driving redundant 48 V BLDC blowers in liquid-cooled GPU server racks requiring silent operation and fail-safe thermal response. IC Role / Device Role / Timing Role: TC78B027FTG provides 1-Hall sine-wave drive with InPAC-optimized commutation, minimizing torque ripple and audible noise at low speeds (<2,000 RPM). Use Value: Achieves <25 dB(A) acoustic noise at 50% speed via smooth sine-wave PWM and soft-start, meeting ASHRAE TC 90.1 data center acoustic requirements. |
| Industrial HVAC Blower | Medical Imaging Equipment Cooling |
Use Scenario: Controlling centrifugal blowers in variable-air-volume (VAV) HVAC units where airflow must scale linearly with duct pressure feedback. IC Role / Device Role / Timing Role: TC78B027FTG receives analog voltage from pressure transducer on SPD pin and executes open-loop speed control with programmable acceleration ramp. Use Value: Enables 0.5–10 s acceleration time adjustment via DUTYCHGLIMIT register, preventing duct vibration and pressure overshoot during stage transitions. | Use Scenario: Managing heat dissipation in MRI and CT scanner gantries where EMI-sensitive analog circuits require ultra-low-noise cooling. IC Role / Device Role / Timing Role: TC78B027FTG operates in standby mode (≤0.5 mA quiescent) when SPD voltage drops below 1.15 V, reducing system idle power by >70%. Use Value: Extends equipment uptime by avoiding thermal shutdown during intermittent high-load imaging sequences through 170°C TSD with 40°C hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLDC pre-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6532GQ-Z | Single-Hall trapezoidal drive only; no sine-wave mode or InPAC; 3.3 V logic interface; 6–28 V VM range | Lacks closed-loop speed control; requires external MCU for RPM regulation; better suited for cost-sensitive, fixed-speed fans | Select MP6532GQ-Z only if trapezoidal commutation and absence of NVM are acceptable trade-offs for wider input voltage range. |
| DRV10983ZRTVT | Integrated 3-phase gate drivers (no external FETs needed); no SPI/NVM; analog-only speed input; 6–24 V VM | Eliminates external MOSFET layout complexity but fixes gate drive strength; no programmable acceleration/deceleration | Choose DRV10983ZRTVT when board space is constrained and design prioritizes integration over configurability and diagnostics. |
Compared with MP6532GQ-Z and DRV10983ZRTVT, TC78B027FTG uniquely combines 1-Hall sine-wave drive, on-chip closed-loop control, SPI-configurable parameters, and NVM storage - making it optimal for applications demanding low-noise, field-upgradable, and MCU-free BLDC motor control.
Availability
TC78B027FTG is available at Aetrix Electronics and suitable for server fan control, data center cooling systems, industrial HVAC blowers, and medical imaging equipment cooling requiring stable component supply and long-term production continuity.
Supply support for TC78B027FTG 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 automotive, industrial, and consumer applications, with emphasis on power efficiency and system integration.
The TC78B027FTG belongs to Toshiba's CDMOS BLDC pre-driver product line, engineered specifically for cost-sensitive, low-noise, and MCU-free fan motor control in computing and thermal management systems.
FAQ
What is the guaranteed operating voltage range for TC78B027FTG?
The TC78B027FTG guarantees full electrical performance across VM = 9–16 V. Operation between 5–9 V is possible but not characterized - parameters like PWM accuracy, gate drive strength, and protection thresholds may vary outside the 9–16 V range. Absolute maximum VM is 18 V; exceeding this risks permanent damage. Always verify VCP voltage (VM + 8 V typ.) remains within absolute max ratings when selecting external capacitors.
Does TC78B027FTG support true sine-wave commutation or only trapezoidal?
TC78B027FTG supports both 1-Hall sine-wave PWM commutation and 1-Hall 150° trapezoidal commutation, selectable via the MODE register. Sine-wave mode reduces torque ripple and acoustic noise - critical for server fans - while trapezoidal mode offers higher efficiency at full load. The InPAC function further optimizes timing in sine-wave mode by correlating Hall and current zero-crossings.
How does the TC78B027FTG closed-loop speed control work without an external microcontroller?
The TC78B027FTG implements a fully self-contained closed-loop speed controller using its internal 10-bit ADC, PI algorithm, and FG tachometer feedback. Target speed is set via SPD pin (PWM or analog), and actual RPM is measured from FG pulses. The IC continuously adjusts PWM duty to minimize error - no external processor, firmware, or external op-amps are required. Configuration registers (e.g., KP/KI gains) are stored in on-chip NVM.
Can TC78B027FTG drive P-channel high-side MOSFETs?
No, TC78B027FTG is designed exclusively for N-channel high-side and low-side MOSFETs. Its GHU/GHV/GHW outputs deliver VM+8 V gate drive using an internal charge pump - a topology incompatible with P-MOSFET gate requirements. Attempting to use P-MOSFETs would prevent proper high-side turn-on and risk shoot-through. External level-shifters or gate-driver ICs are required for P-MOSFET implementations.
What protection features are integrated into TC78B027FTG?
TC78B027FTG integrates eight protection functions: thermal shutdown (TSD) at 170°C, under-voltage lockout for VM/VREG/VCP, over-voltage protection (OVP) triggering at 16.5–17.9 V, over-current limit (OCP) and over-current protection (ISD) via OC pin, and lock detection. All faults assert the ALERT pin low and halt gate drive; recovery is automatic once the fault condition clears, except for lock detection which requires a restart sequence.
TC78B027FTG,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Multiphase
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (3)
- Interface:
- PWM
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 200mA
- Voltage - Supply:
- 5V ~ 16V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TC78B027FTG,EL FAQ
1.How can I place an order for TC78B027FTG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TC78B027FTG,EL 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 TC78B027FTG,EL reliable?
The price and inventory of TC78B027FTG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC78B027FTG,EL is usually 5 days.
3.What payment methods are accepted for TC78B027FTG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC78B027FTG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC78B027FTG,EL?
TC78B027FTG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC78B027FTG,EL 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 TC78B027FTG,EL?
For technical support, including TC78B027FTG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC78B027FTG,EL requirements.
6.How does Aetrix verify that TC78B027FTG,EL is sourced from the original manufacturer or authorized distributors?
All TC78B027FTG,EL 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 TC78B027FTG,EL meets industry standards.
7.What is the process for return or replacement of TC78B027FTG,EL?
All TC78B027FTG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TC78B027FTG,EL, 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 TC78B027FTG,EL part is unused and in its original packaging.
Return procedure for TC78B027FTG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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