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Toshiba Semiconductor and Storage TB9081FG
- Part No.:
- TB9081FG
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 64-LQFP
- Datasheet:
-
TB9081FG.pdf
- Description:
- 3-PHASE BI-CMOS BRUSHLESS MOTOR
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
TB9081FG from Toshiba Electronic Devices & Storage Corporation is an automotive-grade 3-phase brushless motor pre-driver IC with integrated fail-safe relay pre-drivers, charge pump, current detection amplifiers, oscillator, and SPI-configurable abnormal detection circuits. It delivers PWM-controlled gate drive up to 20 kHz, supports VB = 4.5–28 V and VCC = 3.0–5.5 V, operates from −40 °C to +125 °C, and is AEC-Q100 qualified for electric power steering (EPS) and HVAC blower systems.
For engineers reviewing the TB9081FG datasheet, TB9081FG pinout, TB9081FG application, or TB9081FG equivalent, this page provides verified functional identity, confirmed LQFP-64 pin mapping, SPI-configurable fault response logic, ABIST/LBIST diagnostic coverage, and ASIL-D safety architecture per ISO 26262 - all essential for EPS system design, motor control validation, and functional safety certification.
Technical Context
The TB9081FG integrates 11-channel pre-driver logic: six channels (HUO/HVO/HWO/LUO/LVO/LWO) for 3-phase high-side/low-side MOSFET gate control and five channels (BR1O/BR2O/RUO/RVO/RWO) for power/motor relay driving. Its dual charge pump (VCPH for high-side/relay, VCPL for low-side) enables direct N-ch FET drive without external bootstrap components.
Abnormal detection includes independent under-voltage (VB1/VB2, VCC1/VCC2), over-voltage (VCC1/VCC2), over-temperature (TSD1/TSD2/TSD3), and phase-specific FET short-circuit monitoring (SHUHO/SHVHO/SHWHO/SHULO/SHVLO/SHWLO), all configurable via SPI register writes with selectable response modes (OFF, OFF-hold, continued operation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Automotive 3-phase BLDC motor pre-driver with fail-safe relay drivers, charge pump, current sensing, and ASIL-D safety features |
| Operating Voltage (VB) | 4.5 V to 28 V - supports 12 V/24 V battery systems with under-voltage lockout at 4.5 V and over-voltage clamp at 37 V |
| Operating Voltage (VCC) | 3.0 V to 5.5 V - dual supply (VCC1/VCC2) with independent UV/OV detection and POR reset generation |
| Temperature Range | −40 °C to +125 °C - qualified per AEC-Q100 Grade 0, enabling under-hood deployment in EPS and cooling fans |
| PWM Frequency Support | Up to 20 kHz - enables high-efficiency motor commutation with minimal audible noise in automotive cabin applications |
| SPI Interface | Full-duplex with CRC check - used for real-time configuration of fault thresholds, response modes, and diagnostic enablement |
| Safety Certification | ISO 26262 ASIL-D compliant with TM-SIL™, ABIST/LBIST, functional redundancy, and Safety Manual support |
Pinout & Package
Package: LQFP-64 (0.5 mm pitch), 10 mm × 10 mm body, thermally enhanced with three PGND pins (PGND1/PGND2/PGND3) and dual AGND (AGND1/AGND2) for analog signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VB1 / VB2 | Battery power supply inputs | Independent 12 V battery rail inputs with dedicated under-voltage detection comparators and filters |
| VCC1 / VCC2 / VCC_OP | Digital/analog power supplies | VCC1/VCC2 power logic/SPI; VCC_OP powers current-sense amplifiers - each with separate UV/OV monitoring |
| HUI/HVI/HWI / LUI/LVI/LWI | Pre-driver input controls | Pull-down inputs accepting 3.3 V/5 V logic; inhibit mode triggered on simultaneous H/H input per phase |
| HUO/HVO/HWO / LUO/LVO/LWO | Pre-driver outputs | Push-pull gate drivers delivering >1 A peak current with 8 µs current-limiting time programmable via SPI |
| BR1I/BR2I / RUI/RVI/RWI | Relay driver inputs | Pull-down inputs controlling BR1O/BR2O (power supply relays) and RUO/RVO/RWO (motor relays) |
| CP1H/CP1L / CP2H/CP2L | Charge pump drivers | Drive external capacitors to generate VCPH (high-side/relay) and VCPL (low-side); VCPH clamped at 37 V |
| AMP1P/AMP1N / AMP2P/AMP2N / AMP3P/AMP3N | Current sense inputs | Three differential inputs supporting 1-shunt or 3-shunt motor current measurement with rail-to-rail output amplifiers |
| /CS / SCK / SDIN / SDOUT | SPI interface | 4-wire SPI with pull-up (/CS) and pull-down (SCK/SDIN) terminations; SDOUT push-pull output with CRC error flagging |
| NDIAG / ALARM1 / ALARM2 | Fault signaling | NDIAG is open-drain error output; ALARM1/ALARM2 are active-low pre-driver enable inputs with configurable fault masking |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual charge pump | Generates VCPH (for high-side/relay drive) and VCPL (for low-side drive) with 37 V overvoltage clamp and 16 V VCPL clamp |
| Configurable abnormal detection | SPI-programmable response to VB/VCC UV/OV, overtemperature, FET short-circuit, and oscillator frequency faults - including OFF-hold mode |
| ABIST/LBIST diagnostics | Built-in analog and logic BIST covering abnormal detection circuitry, with pass/fail reporting via NDIAG and SPI status registers |
| 3-channel current sensing | Three independent differential amplifiers (AMP1/AMP2/AMP3) with dedicated VCC_OP supply and 1-shunt/3-shunt flexibility |
| ASIL-D safety architecture | Functional redundancy, dual-bandgap references (BG1/BG2), error logic isolation, and Safety Manual support per ISO 26262 |
Applications
| Electric Power Steering (EPS) | HVAC Blower Motor Control |
|---|---|
|
Use Scenario: High-reliability 3-phase BLDC motor control in vehicle steering column, requiring continuous torque delivery and fail-safe shutdown during voltage transients or thermal overload. IC Role / Device Role / Timing Role: Pre-driver IC managing gate signals for six external N-ch MOSFETs, with real-time current sensing and ASIL-D-compliant fault response. Use Value: Enables single-chip motor control with integrated diagnostics, eliminating discrete UV/OV comparators and reducing BOM count by 12+ components versus discrete solutions. |
Use Scenario: Cabin air circulation system using a 24 V BLDC fan motor, where EMI-sensitive analog sensing and robust relay control are required for battery disconnect. IC Role / Device Role / Timing Role: Dual-role controller: drives motor phases via HUO/HVO/HWO/LUO/LVO/LWO and manages BR1O/BR2O power relays for battery isolation. Use Value: Integrates relay pre-drivers with built-in backflow diodes and 1 kΩ output resistance - eliminating external flyback protection and simplifying PCB layout. |
| Electric Brake Booster (EBB) | Seat Ventilation Fan Control |
|
Use Scenario: Redundant brake assist actuation requiring immediate shutdown on VCC undervoltage or FET short-circuit, with diagnostic traceability for ISO 26262 FMEDA. IC Role / Device Role / Timing Role: Safety-critical pre-driver with ABIST/LBIST self-test, NDIAG error signaling, and SPI-configurable fault hold behavior (e.g., OFF-hold after TSD detection). Use Value: Delivers TM-SIL™ ASIL-D compliance out-of-box - reducing functional safety validation effort by providing certified safety analysis reports and failure mode coverage data. |
Use Scenario: Compact seat-integrated cooling fan operating in confined thermal environments, demanding precise current monitoring and overtemperature shutdown. IC Role / Device Role / Timing Role: Current-sensing pre-driver using AMP1P/AMP1N for shunt-based motor current feedback and TSD1/TSD2/TSD3 for localized temperature monitoring. Use Value: Supports 1-shunt configuration with shared amplifier resources - cutting current-sense component count by 66% versus three separate op-amp circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive pre-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV3205-Q1 | Single 3-phase pre-driver without relay drivers or integrated charge pump; requires external bootstrap circuitry | Lacks fail-safe relay pre-drivers and ABIST/LBIST - not ASIL-D capable; suitable only for non-safety-critical fans | Select when cost sensitivity outweighs safety requirements and external bootstrap design is acceptable |
| BD9MXXMUF-C | Includes integrated 3-phase gate drivers but no current-sense amplifiers or SPI-configurable fault logic | No programmable abnormal detection or diagnostic reporting - limited to basic UV/OV monitoring without response customization | Choose for simplified motor control where current sensing and fault logging are handled externally |
Compared with DRV3205-Q1 and BD9MXXMUF-C, the TB9081FG uniquely combines ASIL-D safety architecture, integrated relay pre-drivers, and SPI-configurable multi-level fault responses - making it the only option qualified for EPS and EBB systems requiring full ISO 26262 compliance.
Availability
TB9081FG is available at Aetrix Electronics and suitable for electric power steering (EPS), HVAC blower control, electric brake booster (EBB), and seat ventilation fan applications requiring stable component supply, long-term automotive lifecycle support, and ASIL-D safety certification.
Supply support for TB9081FG 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 markets, with leadership in power management, motor control, and safety-certified ICs.
The TB9081FG belongs to Toshiba's automotive pre-driver product line, engineered specifically for ASIL-D-compliant brushless DC motor systems in electric power steering, braking, and thermal management - emphasizing functional safety, integration density, and diagnostic completeness.
FAQ
What is the primary function of the TB9081FG in automotive motor control systems?
The TB9081FG serves as a safety-certified 3-phase brushless DC motor pre-driver IC with integrated relay drivers, charge pump, current sensing, and configurable abnormal detection. It directly controls external N-channel MOSFETs for motor commutation and battery isolation relays, while providing ABIST/LBIST diagnostics and ASIL-D compliance per ISO 26262 - making TB9081FG essential for EPS, EBB, and HVAC blower applications.
How does the TB9081FG handle under-voltage conditions on the VB supply rails?
The TB9081FG monitors VB1 and VB2 independently using dual comparators and filters. When either rail drops below vthbll (typ. 4.5 V), the vbl1/vbl2 signals assert after filter delay Tbl, turning off pre-driver outputs while keeping oscillator and charge pump active. Recovery occurs when VB exceeds vthblh (typ. 5.0 V), and NDIAG state is restored via SPI register clearing - ensuring TB9081FG maintains safe shutdown until validated re-entry.
Can the TB9081FG support both 1-shunt and 3-shunt current sensing topologies?
Yes, the TB9081FG integrates three differential current-sense amplifiers (AMP1/AMP2/AMP3) and one reference voltage buffer (VRO/VRI), enabling flexible implementation of either 1-shunt (shared amplifier across phases) or 3-shunt (dedicated amplifier per phase) configurations. All amplifiers are powered by VCC_OP and feature rail-to-rail output swing - allowing TB9081FG to deliver accurate motor current feedback across varying load and temperature conditions.
What safety mechanisms are implemented in the TB9081FG to meet ASIL-D requirements?
The TB9081FG implements functional redundancy (dual bandgap references BG1/BG2), hardware self-tests (ABIST for analog blocks, LBIST for digital logic), error-isolated fault signaling (NDIAG), SPI-accessible diagnostic registers, and configurable fault response modes (e.g., OFF-hold). These features - documented in Toshiba's Safety Manual and FMEDA report - collectively enable TB9081FG to achieve TM-SIL™ ASIL-D compliance for safety-critical automotive functions.
Is the TB9081FG pin-compatible with other Toshiba pre-driver ICs such as the TB9051FTG?
No, the TB9081FG is not pin-compatible with TB9051FTG. TB9081FG uses LQFP-64 with dedicated relay driver inputs (BR1I/BR2I), dual VB/VCC supplies, and expanded current-sense I/O (AMP1P/N/O through AMP3P/N/O), whereas TB9051FTG is QFN-48 with single VB/VCC and no relay drivers. Pinout differences, package size, and functional scope prevent direct replacement - system redesign is required when migrating to TB9081FG.
TB9081FG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver
- Output Configuration:
- Pre-Driver
- Interface:
- PWM, SPI
- Technology:
- Bi-CMOS
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- -
- Voltage - Supply:
- 3V ~ 5.5V
- Voltage - Load:
- 4.5V ~ 28V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (10x10)
TB9081FG FAQ
1.How can I place an order for TB9081FG through Aetrix?
Please submit a Request for Quotation (RFQ) for TB9081FG 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 TB9081FG reliable?
The price and inventory of TB9081FG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB9081FG is usually 5 days.
3.What payment methods are accepted for TB9081FG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB9081FG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB9081FG?
TB9081FG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB9081FG 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 TB9081FG?
For technical support, including TB9081FG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB9081FG requirements.
6.How does Aetrix verify that TB9081FG is sourced from the original manufacturer or authorized distributors?
All TB9081FG 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 TB9081FG meets industry standards.
7.What is the process for return or replacement of TB9081FG?
All TB9081FG units undergo pre-shipment inspection (PSI). If there is an issue with TB9081FG, 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 TB9081FG part is unused and in its original packaging.
Return procedure for TB9081FG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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