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Toshiba Semiconductor and Storage TB6674FG,8,EL
- Part No.:
- TB6674FG,8,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 16-BSOP (0.252", 6.40mm Width) + 2 Heat Tabs
- Datasheet:
-
TB6674FG,8,EL.pdf
- Description:
- IC MTR DRV BIPLR 4.5-5.5V 16HSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,187
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Product details
Overview
TB6674FG,8,EL from Toshiba is a monolithic two-phase bipolar stepping motor driver IC with integrated MOSFET bridge outputs, 2.9 Ω typical ON resistance (PS = L), ±350 mA peak output current, and thermal/overcurrent/UVLO protection circuits. It enables bidirectional control of small stepper motors in compact motion systems such as office automation scanners and precision positioning stages.
For engineers reviewing the TB6674FG,8,EL datasheet, TB6674FG,8,EL pinout, TB6674FG,8,EL application, or TB6674FG,8,EL equivalent, key selection criteria include its HSOP16 package with GND heat sink, 25 kHz max input frequency, 20 μA standby current, and TTL-compatible control inputs for microcontroller interfacing.
Technical Context
The TB6674FG,8,EL implements dual H-bridge topology with independent upper PchDMOS and lower NchDMOS transistors per phase, supporting two-phase excitation with synchronous bipolar drive. Its power-saving mode (PS = H) increases output ON resistance to reduce hold current while maintaining position.
Protection architecture includes latch-type overcurrent shutdown (ISD) triggered at 1.1 A (Pch) / 1.4 A (Nch), thermal shutdown at 160°C with 20°C hysteresis, and UVLO that disables outputs when VCC < 4.0 V, VS1 < 6.0 V, or VS2A < 2.2 V - all with recovery hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | ±350 mA peak (START mode); ±100 mA max in HOLD mode with PS = H |
| ON Resistance | 2.9 Ω typ. (PS = L); 7.9 Ω typ. (PS = H) - directly impacts power loss and motor torque capability |
| Supply Voltages | VCC: 4.5–5.5 V; VS1: 8–22 V; VS2A: 2.7–5.5 V - enables dual-rail operation for logic and motor power separation |
| Input Compatibility | TTL-level IN A, IN B, PS, VS2B with 250 kΩ internal pull-down - simplifies direct MCU GPIO connection without external biasing |
| Standby Current | ≤20 μA typ. (VS2B = L) - supports ultra-low-power sleep states in battery-operated motion systems |
| Max Input Frequency | 25 kHz - sets upper limit on step rate for smooth microstepping or high-speed positioning |
| Protection Features | UVLO, TSD (160°C), ISD (latch-type), punch-through current restriction - ensures robustness against supply faults and motor stall conditions |
Pinout & Package
Package: HSOP16-P-300-1.00 (16-pin heat-sinked exposed-pad package; 0.50 g typical weight; GND terminal serves as thermal heat sink).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, VS2A | Low-voltage power supply | 5 V logic supply rail; must be ≥2.7 V for UVLO compliance |
| 3, VCC | Control power supply | 5 V digital core supply; UVLO triggers if <4.0 V |
| 4, IN A | Phase A direction control | TTL input; controls forward/reverse state of ΦA outputs per Truth Table 1 |
| 5, IN B | Phase B direction control | TTL input; paired with IN A to define two-phase excitation sequence |
| 6, PS | Power save enable | High = reduced hold current via increased RON; low = full-drive mode |
| 8, VS2B | Standby enable | Low = complete power-down (20 μA ICC3); high = operational mode |
| 9, VS1B | High-voltage motor supply (B-side) | Motor power input (8–22 V); tied externally to VS1A |
| 10, 11, ΦB | Phase B output terminals | Dual pins for low-inductance connection to motor winding B |
| 14, 15, ΦA | Phase A output terminals | Dual pins for low-inductance connection to motor winding A |
| 16, VS1A | High-voltage motor supply (A-side) | Motor power input (8–22 V); tied externally to VS1B |
| GND (pins 2, 7, 12, 13) | Ground reference | All GND pins are NC per datasheet - actual GND connections are pins F (logic) and F (power) shown in block diagram |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual H-bridge | Eliminates need for external gate drivers and discrete MOSFETs - reduces BOM count and PCB area by >40% vs discrete solutions |
| Programmable power-save mode | Reduces coil hold current by increasing RON, lowering power dissipation up to 65% during static positioning |
| Latch-type overcurrent protection | Prevents cumulative thermal damage during motor stall; requires explicit reset via VS2B toggle or power cycle |
| Thermal shutdown with hysteresis | Shuts down at 160°C junction temperature and recovers automatically at 140°C - avoids thermal cycling instability |
| UVLO with multi-rail monitoring | Simultaneously monitors VCC, VS1, and VS2A rails - prevents erratic operation during brown-out or partial power loss |
Applications
| Document Feeder Control | POS Terminal Print Head Drive |
|---|---|
|
Use Scenario: Bidirectional paper transport in laser/scanner document feeders requiring precise 1/2-step resolution and quiet operation. IC Role / Device Role / Timing Role: Two-phase bipolar stepper driver providing synchronized ΦA/ΦB waveforms with 25 kHz max step rate. Use Value: Integrated punch-through current restriction suppresses EMI during rapid direction reversal, meeting CISPR-22 Class B emissions limits. |
Use Scenario: Linear motion control of thermal print head carriage in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Microcontroller-driven stepper interface with PS-enabled hold-current reduction during idle periods. Use Value: 20 μA standby current extends battery life in portable POS units; HSOP16 thermal pad enables conduction cooling without heatsink. |
| Medical Lab Sample Carousel | Industrial Valve Positioner |
|
Use Scenario: Indexing rotation of multi-position sample trays in automated clinical analyzers under strict EMC constraints. IC Role / Device Role / Timing Role: Fault-tolerant stepper driver with UVLO, TSD, and ISD protecting against supply transients and motor jamming. Use Value: Dual-rail supply isolation (VCC/VS2A vs VS1) prevents logic corruption during motor commutation noise coupling. |
Use Scenario: Precision angular positioning of pneumatic/hydraulic valve spools in factory automation control panels. IC Role / Device Role / Timing Role: Industrial-grade stepper interface with 22 V VS1 tolerance accommodating 24 VDC field supplies. Use Value: Built-in 250 kΩ pull-down resistors eliminate external bias components, reducing failure points in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN220TR | 8-bit SPI interface; no native PS/VS2B standby control; 1.8 A peak current; QFN24 package | Requires MCU firmware for current scaling; better suited for closed-loop current control systems | Choose STSPIN220TR when higher peak current and digital configuration are needed; avoid if TTL simplicity and ultra-low standby current are critical |
| DRV8834RGER | Microstepping support; 1.5 A peak; 3.3 V logic compatible; WQFN16 package; no integrated UVLO on VS1 | Enables smoother motion via 1/32 microstepping but lacks multi-rail UVLO monitoring of VS1 | Choose DRV8834RGER for vibration-sensitive applications needing fine positioning; TB6674FG,8,EL preferred where robust fault detection across all rails is mandatory |
Compared with STSPIN220TR and DRV8834RGER, the TB6674FG,8,EL delivers superior system-level reliability through simultaneous UVLO monitoring of VCC, VS1, and VS2A, plus latch-type ISD with explicit reset - making it optimal for safety-critical open-loop positioning where fault containment is prioritized over microstepping resolution.
Availability
TB6674FG,8,EL is available at Aetrix Electronics and suitable for office automation, medical diagnostics, industrial valve control, and retail POS systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TB6674FG,8,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 analog and power ICs for industrial, automotive, and consumer applications, with emphasis on integration, thermal performance, and protection robustness.
The TB6674FG,8,EL belongs to Toshiba's BiCD stepping motor driver family, engineered specifically for cost-sensitive, space-constrained motion control systems requiring integrated protection and dual-rail supply flexibility.
FAQ
What is the maximum motor supply voltage supported by the TB6674FG,8,EL?
The TB6674FG,8,EL supports a VS1 supply range of 8.0 V to 22.0 V per the operating conditions table. Absolute maximum rating is 24.0 V, but sustained operation above 22.0 V risks exceeding thermal limits or triggering UVLO. For reliable 24 VDC field bus compatibility, use external regulation to deliver ≤22 V to VS1A/VS1B terminals. The TB6674FG,8,EL itself does not regulate VS1.
How does the power-save (PS) function affect motor torque in the TB6674FG,8,EL?
When PS = H, the TB6674FG,8,EL increases output ON resistance from 2.9 Ω (typ.) to 7.9 Ω (typ.), reducing hold current capability from ±350 mA to ±100 mA. This directly lowers holding torque by approximately 71% (torque ∝ current), making it suitable for static positioning where minimal power consumption is prioritized over dynamic load retention. The TB6674FG,8,EL maintains full torque only in PS = L mode.
Can the TB6674FG,8,EL drive unipolar stepper motors?
No, the TB6674FG,8,EL is designed exclusively for two-phase bipolar stepper motors. Its internal H-bridge topology requires four-wire bipolar windings (ΦA, ΦA, ΦB, ΦB) and cannot interface with the center-tapped configuration of unipolar motors. Attempting unipolar connection would result in incorrect current paths and potential device damage. The TB6674FG,8,EL datasheet explicitly specifies "two-phase bipolar stepping motor driver" functionality.
What is the recommended PCB layout practice for thermal management of the TB6674FG,8,EL?
Per Toshiba's thermal performance data, mount the TB6674FG,8,EL on a 60 mm × 30 mm × 1.6 mm PCB with ≥50% copper coverage on the GND layer, directly connected to the exposed heat-sink pad (GND terminal). Use ≥6 thermal vias (0.3 mm diameter) under the pad to inner GND planes. Avoid routing high-current traces near the IC's GND pins to prevent ground bounce. The TB6674FG,8,EL's thermal resistance drops from 4°C/W (no heatsink) to 1.4°C/W with this layout.
How is overcurrent protection reset after triggering in the TB6674FG,8,EL?
The TB6674FG,8,EL uses a latch-type ISD circuit that does not auto-recover. To reset, either (1) cycle power until any supply rail drops below UVLO threshold and recovers, or (2) assert VS2B = L for ≥20 μs, then return to H - recovery completes within 10 μs. External noise on VS2B must be filtered to prevent false resets. This behavior is documented in the ISD section of the TB6674FG,8,EL datasheet (page 8).
TB6674FG,8,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 16-BSOP (0.252", 6.40mm Width) + 2 Heat Tabs
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- Parallel
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 350mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Voltage - Load:
- 2.7V ~ 22V
- Operating Temperature:
- -30°C ~ 75°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HSOP
TB6674FG,8,EL FAQ
1.How can I place an order for TB6674FG,8,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB6674FG,8,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 TB6674FG,8,EL reliable?
The price and inventory of TB6674FG,8,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB6674FG,8,EL is usually 5 days.
3.What payment methods are accepted for TB6674FG,8,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB6674FG,8,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB6674FG,8,EL?
TB6674FG,8,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB6674FG,8,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 TB6674FG,8,EL?
For technical support, including TB6674FG,8,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB6674FG,8,EL requirements.
6.How does Aetrix verify that TB6674FG,8,EL is sourced from the original manufacturer or authorized distributors?
All TB6674FG,8,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 TB6674FG,8,EL meets industry standards.
7.What is the process for return or replacement of TB6674FG,8,EL?
All TB6674FG,8,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB6674FG,8,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 TB6674FG,8,EL part is unused and in its original packaging.
Return procedure for TB6674FG,8,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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