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Toshiba Semiconductor and Storage TC78B002FNG,EL
- Part No.:
- TC78B002FNG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 16-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TC78B002FNG,EL.pdf
- Description:
- IC MOTOR DRIVER 3.5V-16V 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TC78B002FNG,EL from Toshiba is a single-phase full-wave brushless DC fan motor driver IC with integrated DMOS output stage, 1.5 A continuous output current capability, 16 V maximum motor supply voltage (VM), PWM control, and built-in hall bias, FG/RDO outputs, soft switching, and lock protection with automatic recovery. It targets compact, high-efficiency cooling systems in office equipment and industrial enclosures.
For engineers reviewing the TC78B002FNG,EL datasheet, TC78B002FNG,EL pinout, TC78B002FNG,EL application, or TC78B002FNG,EL equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and current-limiting behavior, and real-world motor control use cases - all grounded in Toshiba's official specification data.
Technical Context
The TC78B002FNG,EL implements a hall-sensor-based commutation engine with 7-bit ADC-controlled PWM duty (15–90% range), programmable lead angle (0–22.5°), and dual-stage current limiting: analog RS-pin sensing (VRS = 0.3 V typ) for fast transient response and digital overcurrent detection (ILIM = 2.5 A typ) with 2 μs masking. Its internal oscillator (8–12 MHz, set by external 24 kΩ resistor) feeds a fixed 1/400 divider to generate 20–30 kHz PWM frequency.
Soft switching is implemented via independent VSOFT/VOFF voltage-controlled timing (0–87.2° conduction-angle resolution), enabling stepwise 16-level PWM ramping before/after phase transitions. Lock protection triggers after 0.4 s (TON) of missing hall edges and recovers automatically after 4 s (TOFF), while thermal shutdown activates at 170°C (TSD) with 40°C hysteresis (ΔTSD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor supply voltage (VM) | 5.5–16 V operating range; enables direct connection to 12 V rail without external regulator |
| Continuous output current | 1.5 A max; supports mid-power axial fans up to ~30 W mechanical output |
| PWM frequency | 20–30 kHz; avoids audible noise while maintaining efficient MOSFET switching |
| Internal oscillation frequency | 8–12 MHz (ROSC = 24 kΩ); sets precise timing base for commutation and protection logic |
| Output ON resistance (Ron) | 1.6 Ω typ (H+L); minimizes conduction loss and self-heating under load |
| Thermal shutdown threshold | 170°C junction temperature (TSD); protects against sustained overload or poor heatsinking |
| FG & RDO output type | Open-drain digital outputs; require external pull-up for speed feedback and lock status monitoring |
Pinout & Package
TC78B002FNG,EL is housed in a 16-pin SSOP package (SSOP16-P-225-0.65B) with 0.65 mm pitch, 5.0 mm × 6.4 mm body size, and exposed thermal pad (not electrically connected). The package supports surface-mount reflow assembly and provides adequate thermal dissipation for 0.96 W max power dissipation on standard FR-4 PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREG | 5 V reference output | Stable 5 V ±0.5 V source for hall sensor bias and external logic; supplies up to 10 mA |
| HP / HM | Hall signal differential inputs | Accept 40 mV min swing; common-mode range 0 to VREG−1.5 V; enable robust rotor position sensing |
| OUT1 / OUT2 | DMOS motor drive outputs | Full-bridge complementary outputs; support single-phase BLDC commutation with Hi-Z, PWM, or OFF states |
| FG | Rotation detection output | Open-drain pulse output synchronized to hall zero-crossings; used for RPM monitoring |
| RDO | Lock detection output | Open-drain active-low flag indicating stalled motor condition; auto-clears after TOFF |
| VSP / VMI | PWM duty control inputs | Analog-set 15–90% duty range (7-bit ADC); VMI defines minimum duty floor; both referenced to VREG |
| VSOFT / VOFF | Soft-switching timing controls | Voltage-programmable conduction-angle resolution (0–87.2°); decouple ramp timing from commutation edge |
| LA | Lead angle adjustment input | 0–22.5° advance setting (32-step DAC); improves torque efficiency at higher speeds |
| RS | Current sense input | Monitors voltage drop across external shunt (e.g., 0.51 Ω); triggers analog current limit at 0.3 V |
| OSCR | Oscillator resistor terminal | Connects external 24 kΩ resistor to ground; sets fOSC = 1/(2 × 2.08 pF × ROSC) |
Key Features
| Feature | Design Value |
|---|---|
| Single-phase full-wave BLDC drive | Enables compact fan control with only one hall sensor pair and no external gate drivers |
| Built-in hall bias generation | VREG pin supplies regulated 5 V to external hall ICs - eliminates need for separate bias regulator |
| Programmable soft switching | VSOFT/VOFF pins allow fine-grained control of PWM ramp duration (0–87.2°), reducing EMI and torque ripple |
| Automatic lock recovery | Detects stall via FG timeout (TON = 0.4 s), disables drive for 1 ms, then fully shuts down for TOFF = 4 s before retry |
| Dual-stage current protection | Fast analog RS-pin limit (588 mA @ 0.51 Ω) + digital ISD detection (2.5 A) with 2 μs noise masking |
| Quick start override | Clears lock state mid-TOFF by pulling VSP ≤ 0.55 V for ≥10 ms (TVSP), enabling immediate restart without waiting |
Applications
| Office Equipment Cooling | Industrial Enclosure Fans |
|---|---|
Use Scenario: Constant-speed airflow management in laser printers and multifunction copiers where acoustic noise must remain below 35 dB(A). IC Role / Device Role / Timing Role: Single-phase BLDC driver coordinating hall feedback, PWM modulation, and FG-based closed-loop speed verification. Use Value: Soft switching (TSOFT up to 90°) and 25 kHz PWM suppress audible whine; 1.5 A rating supports 24 V, 25 mm–40 mm axial fans. |
Use Scenario: Forced-air cooling for PLC cabinets and motor drives operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: Motor controller implementing thermal shutdown (TSD = 170°C), UVLO (2.9 V), and lock recovery to ensure unattended reliability. Use Value: Automatic TOFF = 4 s lock recovery and quick-start override prevent system downtime; RS-pin current limit prevents damage during startup surge. |
| Server Rack Ventilation | Medical Diagnostic Equipment Fans |
Use Scenario: Variable-speed fan control in 1U/2U servers using PWM duty scaling (via VSP/VMI) to match thermal load profiles. IC Role / Device Role / Timing Role: Duty-controlled driver with 15–90% programmable range, FG tachometer output, and RDO fault signaling to BMC. Use Value: 7-bit ADC mapping enables smooth 127-step duty control; FG/RDO open-drain outputs interface directly with 3.3 V SMBus controllers. |
Use Scenario: Low-noise, fail-safe cooling for MRI gradient amplifiers and CT detector modules requiring <10 ppm failure rate. IC Role / Device Role / Timing Role: Safety-critical motor driver with dual overcurrent detection (analog + digital), thermal hysteresis (ΔTSD = 40°C), and UVLO reset lockout. Use Value: Independent ISD circuit detects per-transistor overcurrent; TSD hysteresis prevents thermal cycling; RDO provides diagnostic flag for maintenance logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase BLDC fan motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3981SLDTR-T | Higher VM rating (40 V), but no integrated hall bias; requires external 5 V supply for hall sensor | Preferred for high-voltage (>24 V) industrial blowers; lacks FG/RDO diagnostics | Choose when motor supply exceeds 16 V or when discrete hall bias is acceptable |
| ON SEMICONDUCTOR LV8804V-TLM-H | Lower IOUT (1.0 A), no soft switching; uses SPI interface instead of analog VSP/VMI control | Suited for cost-sensitive, digitally controlled designs with microcontroller coordination | Choose when digital command interface is required and peak current ≤1.0 A suffices |
Compared with A3981SLDTR-T and LV8804V-TLM-H, TC78B002FNG,EL uniquely integrates hall bias, FG/RDO status outputs, and voltage-programmable soft switching - making it optimal for analog-controlled, self-contained fan modules where board space and BOM count are constrained.
Availability
TC78B002FNG,EL is available at Aetrix Electronics and suitable for office equipment cooling, industrial enclosure ventilation, server rack thermal management, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TC78B002FNG,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 high-reliability semiconductor solutions for motor control, power management, and interface applications, with deep expertise in integrated driver ICs for consumer and industrial markets.
The TC78B002FNG,EL belongs to Toshiba's fan motor driver product line, engineered specifically for compact, low-noise, single-phase BLDC fan control in space-constrained applications where analog programmability, integrated diagnostics, and robust protection are essential.
FAQ
What is the maximum motor supply voltage supported by TC78B002FNG,EL?
The TC78B002FNG,EL supports a maximum motor supply voltage (VM) of 16 V under normal operating conditions, with an absolute maximum rating of 18 V. Exceeding 16 V risks violating operational limits and may trigger UVLO or thermal shutdown. The IC is optimized for 12 V fan systems and includes under-voltage lockout (UVLO) that disables operation below 2.9 V (typ) to prevent erratic behavior.
How does the soft switching function work in TC78B002FNG,EL?
The TC78B002FNG,EL implements soft switching via two dedicated analog inputs - VSOFT and VOFF - which independently program the ramp duration (0–87.2°) and forced OFF period during commutation transitions. When VSOFT > VOFF, the output PWM duty changes in up to 16 steps between 4% and 100%, reducing torque ripple and EMI. This behavior is confirmed in Toshiba's functional description and timing charts for TC78B002FNG,EL.
Can TC78B002FNG,EL drive a fan without an external hall sensor?
No - TC78B002FNG,EL requires an external hall-effect sensor for rotor position detection. It provides built-in hall bias (via VREG pin) and differential HP/HM inputs with 40 mV minimum swing sensitivity, but contains no internal magnetic sensing element. The IC's commutation logic, FG output, and lock protection all depend on valid hall signal edges; operation without a hall sensor is not supported.
What protection features are integrated into TC78B002FNG,EL?
The TC78B002FNG,EL integrates six verified protection mechanisms: (1) current limit via RS pin (VRS = 0.3 V typ), (2) digital overcurrent detection (ILIM = 2.5 A typ), (3) thermal shutdown (TSD = 170°C typ, ΔTSD = 40°C), (4) lock protection with automatic recovery (TON = 0.4 s, TOFF = 4 s), (5) under-voltage lockout (UVLO = 2.9 V typ), and (6) soft switching to reduce voltage stress during transitions - all documented in Toshiba's official datasheet for TC78B002FNG,EL.
Is TC78B002FNG,EL compatible with 3.3 V logic interfaces?
Yes - TC78B002FNG,EL supports 3.3 V logic compatibility through its VSP, VMI, VSOFT, VOFF, and LA control pins, which accept input voltages from 0 to VREG (5 V) and feature ≤1 μA input current. Its FG and RDO outputs are open-drain and require external pull-up to 3.3 V for direct interfacing with microcontrollers or BMCs. The VREG pin also supplies clean 5 V for biasing external 3.3 V-compatible hall sensors.
TC78B002FNG,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 16-LSSOP (0.173", 4.40mm 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 (2)
- Interface:
- PWM
- Technology:
- DMOS
- Step Resolution:
- -
- Applications:
- Fan Motor Driver
- Current - Output:
- 1.5A
- Voltage - Supply:
- 3.5V ~ 16V
- Voltage - Load:
- 3.5V ~ 16V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
TC78B002FNG,EL FAQ
1.How can I place an order for TC78B002FNG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TC78B002FNG,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 TC78B002FNG,EL reliable?
The price and inventory of TC78B002FNG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC78B002FNG,EL is usually 5 days.
3.What payment methods are accepted for TC78B002FNG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC78B002FNG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC78B002FNG,EL?
TC78B002FNG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC78B002FNG,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 TC78B002FNG,EL?
For technical support, including TC78B002FNG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC78B002FNG,EL requirements.
6.How does Aetrix verify that TC78B002FNG,EL is sourced from the original manufacturer or authorized distributors?
All TC78B002FNG,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 TC78B002FNG,EL meets industry standards.
7.What is the process for return or replacement of TC78B002FNG,EL?
All TC78B002FNG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TC78B002FNG,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 TC78B002FNG,EL part is unused and in its original packaging.
Return procedure for TC78B002FNG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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