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Toshiba Semiconductor and Storage TC78B006FTG,EL
- Part No.:
- TC78B006FTG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TC78B006FTG,EL.pdf
- Description:
- IC MOTOR DRIVER 3.5V-16V 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:11,980
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Product details
Overview
TC78B006FTG,EL from Toshiba Electronic Devices & Storage Corporation is a single-phase full-wave pre-driver IC for brushless DC fan motors, featuring direct PWM input (TSP pin), rotation speed detection output (FG pin), 30 V maximum motor supply voltage (VM), built-in 5 V voltage regulator (VREG), and soft switching drive. It integrates lock protection with automatic restart, thermal shutdown, and Hall-effect sensor interface for precise commutation control in compact cooling systems.
For engineers reviewing the TC78B006FTG,EL datasheet, TC78B006FTG,EL pinout, TC78B006FTG,EL application, or TC78B006FTG,EL equivalent, this device supports fan motor control with programmable soft start, current limit detection (OC pin), adjustable lock protection timing (CT pin), and low-power standby mode - critical for thermal management in server, networking, and industrial power supplies.
Technical Context
The TC78B006FTG,EL implements a Hall-sensor-based commutation controller with internal oscillator (10 MHz typ.) generating 40 kHz PWM output. It operates in square-wave startup mode until hall frequency exceeds 10 Hz, then transitions to estimated-timing drive with soft switching enabled above that threshold. The IC uses external N-channel and P-channel MOSFETs driven via complementary high-side (OUT1P/OUT2P) and low-side (OUT1N/OUT2N) outputs.
Control logic includes configurable minimum duty/startup threshold via VMI pin, slew-rate-controlled duty transition via SS pin, and dual-mode input support (TSP for PWM, FG for tach feedback). Lock protection triggers when hall zero-crossing is absent for TON (set by CT pin), disabling high-side FETs for TOFF before auto-restart.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor supply voltage (VM) | 5.5–30 V operating range; supports 12 V and 24 V fan rails with 40 V absolute max rating. |
| Output PWM frequency | 40 kHz typical; enables efficient switching of external MOSFETs while minimizing audible noise. |
| VREG output | 5.0 V ±0.5 V at −10 mA; powers external Hall sensors or logic without auxiliary regulator. |
| FG output | Open-drain tach signal synchronized to rotor position; provides 2-pulse-per-revolution timing for RPM calculation. |
| Thermal shutdown | Activates at 165 °C junction temperature with 40 °C hysteresis; prevents latch-up during overload or poor heatsinking. |
| Current limit threshold | 150 mV on OC pin; sets overcurrent trip point for external sense resistor, enabling scalable current protection. |
| Standby current | 0.5–1.0 mA; reduces system power consumption when fan is idle but Hall signal remains active. |
Pinout & Package
TC78B006FTG,EL uses a 16-pin WQFN package (P-WQFN16-0303-0.50-003), 3.0 mm × 3.0 mm × 0.8 mm, with exposed thermal pad. Pin pitch is 0.5 mm; recommended PCB layout includes thermal vias under the pad for junction-to-board heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VM | Motor power supply input; connects to 5.5–30 V DC rail driving external half-bridge FETs. |
| 2 | OUT2P | High-side gate drive output for second phase; sinks up to 11 mA to turn on external P-FET. |
| 3 | FG | Open-drain rotation detection output; requires external pull-up to VREG or VM for tach signal generation. |
| 4 | TSP | PWM duty command input; accepts 1–100 kHz logic-level signal to set fan speed from 0% to 100%. |
| 5 | VMI | Minimum duty/startup threshold adjust; voltage divider from VREG sets lower speed limit or startup enable point. |
| 6 | VSOFT | Soft switching control; adjusts dead-time between high/low-side FET transitions to reduce shoot-through risk. |
| 7 | CT | Lock protection timing; resistor-to-ground sets TON (lock detection window) and TOFF (auto-restart delay). |
| 8 | SS | Soft start slew rate; voltage divider from VREG controls ramp time for output duty during startup sequence. |
| 9 | GND | Power and signal reference ground; must be low-impedance connection to minimize noise coupling. |
| 10 | HM | Hall sensor negative input; differential pair with HP detects rotor position for commutation timing. |
| 11 | HP | Hall sensor positive input; complements HM for robust magnetic field sensing in noisy environments. |
| 12 | VREG | 5 V regulated output; powers Hall sensors and external logic; not for loading beyond −10 mA. |
| 13 | OUT1P | High-side gate drive output for first phase; identical function to OUT2P with independent control path. |
| 14 | OUT1N | Low-side gate drive output for first phase; sources up to −20 mA to drive external N-FET gate. |
| 15 | OUT2N | Low-side gate drive output for second phase; matches OUT1N in drive strength and timing. |
| 16 | OC | Current limit detection node; connects to sense resistor; pulls low when voltage exceeds 150 mV. |
Key Features
| Feature | Design Value |
|---|---|
| Direct PWM input interface | Accepts standard 3.3 V/5 V logic PWM signals (1–100 kHz) without level-shifting or external conditioning. |
| Integrated 5 V regulator | Eliminates need for external LDO; powers Hall sensors and microcontroller I/O while maintaining ±10% regulation across load and temperature. |
| Programmable lock protection | Configurable TON/TOFF via single CT resistor enables tuning for motor inertia and stall recovery behavior. |
| Soft switching drive | Adjustable dead-time (via VSOFT) prevents cross-conduction in external half-bridge, reducing switching losses and EMI. |
| Rotation speed detection (FG) | Hardware-generated tach signal synchronized to Hall edges; supports closed-loop speed control without firmware overhead. |
| Quick-start capability | Resumes operation from standby within one Hall cycle upon TSP reactivation; avoids multi-second spin-up delays. |
Applications
| Server CPU Cooling Fan | Industrial Power Supply Fan |
|---|---|
Use Scenario: Thermal management in 1U/2U rack servers where airflow must scale dynamically with processor load. IC Role / Device Role / Timing Role: Pre-driver controlling external half-bridge FETs to modulate BLDC fan speed based on PWM commands from BMC or baseboard controller. Use Value: Enables precise 40 kHz PWM control with tach feedback (FG) for real-time RPM monitoring and closed-loop thermal regulation. | Use Scenario: Forced-air cooling in telecom rectifiers and industrial AC/DC power modules operating continuously at elevated ambient temperatures. IC Role / Device Role / Timing Role: Hall-commutated pre-driver managing fan startup, lock detection, and thermal shutdown to ensure reliability under sustained load. Use Value: Built-in 165 °C thermal shutdown and automatic restart after lock events prevent catastrophic overheating without system intervention. |
| Network Switch Chassis Fan | Medical Imaging Equipment Fan |
Use Scenario: Multi-fan cooling in high-port-density Ethernet switches requiring coordinated speed control and fault reporting. IC Role / Device Role / Timing Role: Fan pre-driver with FG output feeding speed data to switch ASIC for fan health diagnostics and predictive maintenance. Use Value: Open-drain FG signal simplifies integration with existing monitoring infrastructure; low standby current (<1 mA) reduces idle power draw. | Use Scenario: Acoustically sensitive cooling in MRI or CT scanner enclosures where fan noise must remain below clinical thresholds. IC Role / Device Role / Timing Role: Low-noise pre-driver using soft switching and 40 kHz PWM to suppress audible whine while maintaining thermal performance. Use Value: Adjustable VSOFT pin allows fine-tuning of dead-time to minimize EMI and mechanical vibration in EMC-critical medical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fan motor pre-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC78B006FNG,EL | Same functional spec, but SSOP-16 package (5.0 mm × 6.4 mm); higher thermal resistance (130 °C/W vs. 50 °C/W). | Preferred for through-hole prototyping or legacy board designs with SSOP footprints; less suitable for space-constrained server modules. | Select TC78B006FNG,EL only if SSOP-16 layout compatibility or manual assembly is required. |
| DRV10983ZRTVT | TI integrated BLDC driver (not pre-driver); includes gate drivers, current sense, and MCU; no external FETs needed. | Replaces entire motor drive stage; eliminates discrete FET selection but increases BOM cost and reduces voltage scalability beyond 24 V. | Choose DRV10983ZRTVT when system-level integration and reduced component count outweigh flexibility in FET selection and voltage headroom. |
Compared with TC78B006FNG,EL, the TC78B006FTG,EL offers 2.6× lower thermal resistance for higher power density in fan modules, while DRV10983ZRTVT trades external FET flexibility for full integration - making TC78B006FTG,EL optimal for cost-sensitive, thermally constrained, and voltage-scalable fan control.
Availability
TC78B006FTG,EL is available at Aetrix Electronics and suitable for server cooling, industrial power supply thermal management, and network equipment fan control requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TC78B006FTG,EL 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 and manufactures high-reliability semiconductor solutions for automotive, industrial, and consumer applications, with emphasis on motor control, power management, and analog ICs.
The TC78B006 series targets compact, high-efficiency BLDC fan motor control in thermally demanding environments, delivering integrated pre-driver functionality with programmable protection and diagnostics for next-generation cooling systems.
FAQ
What is the maximum motor supply voltage supported by the TC78B006FTG,EL?
The TC78B006FTG,EL supports a maximum motor supply voltage (VM) of 40 V absolute rating, with recommended operating range of 5.5 V to 30 V. Operation at 30 V enables compatibility with 24 V fan rails while maintaining margin against transients. Exceeding 40 V risks permanent damage per absolute maximum ratings.
How does the TC78B006FTG,EL implement rotation speed detection?
TC78B006FTG,EL generates an open-drain FG (Frequency Generator) signal synchronized to Hall sensor zero-crossings, producing two pulses per electrical revolution. This tach output requires an external pull-up resistor to VREG or VM and provides real-time RPM feedback without software polling or additional timers.
Can the TC78B006FTG,EL operate with analog voltage input instead of PWM?
No - the TC78B006FTG,EL variant specifically supports direct PWM input on the TSP pin and FG output. Analog voltage input (VSP) is only available on the BFTG and CFTG variants. Using TC78B006FTG,EL with analog control would require external PWM generation circuitry.
What is the purpose of the VMI pin on the TC78B006FTG,EL?
The VMI pin on TC78B006FTG,EL configures either minimum output duty or startup threshold via a voltage divider from VREG. For example, 1.46 V on VMI sets 35% minimum speed, preventing stall at low RPM. Leaving VMI unconnected or tied to GND disables this feature and defaults to 0% minimum.
Does the TC78B006FTG,EL include thermal protection?
Yes - TC78B006FTG,EL incorporates a junction temperature-based thermal shutdown circuit activating at 165 °C (typ.), with 40 °C hysteresis. When triggered, all outputs disable until temperature falls below 125 °C, protecting both the IC and external FETs during overload or inadequate heatsinking conditions.
TC78B006FTG,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (2)
- Interface:
- PWM
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 3.5V ~ 16V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (3x3)
TC78B006FTG,EL FAQ
1.How can I place an order for TC78B006FTG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TC78B006FTG,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 TC78B006FTG,EL reliable?
The price and inventory of TC78B006FTG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC78B006FTG,EL is usually 5 days.
3.What payment methods are accepted for TC78B006FTG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC78B006FTG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC78B006FTG,EL?
TC78B006FTG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC78B006FTG,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 TC78B006FTG,EL?
For technical support, including TC78B006FTG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC78B006FTG,EL requirements.
6.How does Aetrix verify that TC78B006FTG,EL is sourced from the original manufacturer or authorized distributors?
All TC78B006FTG,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 TC78B006FTG,EL meets industry standards.
7.What is the process for return or replacement of TC78B006FTG,EL?
All TC78B006FTG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TC78B006FTG,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 TC78B006FTG,EL part is unused and in its original packaging.
Return procedure for TC78B006FTG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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