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Texas Instruments UC3708DW
- Part No.:
- UC3708DW
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UC3708DW.pdf
- Description:
- IC GATE DRVR LOW-SIDE 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:108
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Product details
Overview
UC3708DW from Texas Instruments is a dual non-inverting power driver IC designed to interface TTL/CMOS logic with high-power MOSFETs in motor control and switching power supply circuits. It delivers 3.0A peak output current per channel, operates from 5V to 35V supply, features 25ns rise/fall times and propagation delays, and includes independent enable and shutdown controls for system-level power management.
For engineers reviewing the UC3708DW datasheet, UC3708DW pinout, UC3708DW application, or UC3708DW equivalent, this page provides verified technical context, SOIC-16 package details, thermal shutdown behavior, input voltage tolerance up to VIN+0.3V, and real-world use cases in half-bridge gate driving and industrial PWM systems.
Technical Context
The UC3708DW integrates two independent totem-pole output stages with Schottky process technology, enabling efficient high-frequency switching up to 200kHz. Each channel accepts logic-level inputs compatible with TTL and CMOS, tolerating voltages up to VIN+0.3V on A/B inputs and 6.2V on Enable/Shutdown pins.
Its internal bias circuitry supports operation across 0°C to 70°C ambient, with under-voltage lockout triggered when Enable falls below 1.0V (falling threshold) and thermal shutdown activating at 155°C junction temperature. The device holds outputs in a self-biasing low-voltage state during disable or UVLO conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 35 V - supports wide-input industrial and automotive power rails without external regulation |
| Peak Output Current | 3.0 A per channel - sufficient to directly drive medium-power MOSFET gates without external buffers |
| Rise/Fall Time | 25 ns - enables clean switching at >1 MHz effective edge rates for reduced EMI in SMPS designs |
| Propagation Delay | 25 ns - ensures tight timing alignment between input logic and output drive transitions |
| Input Voltage Tolerance | A/B inputs withstand up to VIN + 0.3 V - eliminates need for level-shifting in high-side bootstrap configurations |
| Thermal Shutdown Threshold | 155 °C - protects against latch-up and bond-wire failure during sustained overload or poor heatsinking |
| Enable Threshold (rising) | 2.8 V to 3.6 V - compatible with standard 3.3V and 5V logic families for robust enable signaling |
Pinout & Package
UC3708DW is housed in a 16-pin SOIC (DW) package with 1.27 mm pitch, 7.5 mm × 10.3 mm body size, and 2.65 mm maximum height - suitable for automated SMT assembly and moderate-power thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unused terminal; must remain unconnected per datasheet |
| 2 (Input A) | Channel A Logic Input | TTL/CMOS-compatible input controlling Output A; withstands up to VIN + 0.3 V |
| 3 (Enable) | Global Enable Control | Active-high logic input; forces outputs into low-power self-biasing state when low |
| 4 (Logic Gnd) | Digital Reference Ground | Reference for all logic inputs and internal bias; separate from power ground paths |
| 5 (NC) | No Connect | Unused terminal; must remain unconnected |
| 6 (Shutdown) | Global Output Disable | Active-high input that forces both outputs low without affecting internal logic state |
| 7 (Input B) | Channel B Logic Input | TTL/CMOS-compatible input controlling Output B; withstands up to VIN + 0.3 V |
| 8 (NC) | No Connect | Unused terminal; must remain unconnected |
| 9 (Pwr Gnd A) | Power Return for Output A | Dedicated ground path for Output A current return; minimizes crosstalk with digital ground |
| 10 (Output A) | Channel A Power Output | Non-inverting totem-pole driver capable of sourcing/sinking 3.0 A peak |
| 11 (VIN) | Main Supply Input | Primary power rail (5–35 V); supplies both output stages and internal bias circuitry |
| 12 (Output B) | Channel B Power Output | Non-inverting totem-pole driver capable of sourcing/sinking 3.0 A peak |
| 13 (VIN) | Main Supply Input (redundant) | Second connection point to VIN rail; improves decoupling and reduces trace inductance |
| 14 (Pwr Gnd B) | Power Return for Output B | Dedicated ground path for Output B current return; isolates power ground loops |
| 15 (NC) | No Connect | Unused terminal; must remain unconnected |
| 16 (NC) | No Connect | Unused terminal; must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent totem-pole outputs | Enables synchronous or complementary half-bridge control without external logic inversion |
| 3.0 A peak current capability per channel | Drives gate capacitance of MOSFETs up to ~5 nF at 200 kHz without external buffers |
| 25 ns rise/fall and propagation delays | Supports precise timing-critical applications such as phase-shifted full-bridge converters |
| Separate Enable and Shutdown controls | Enable disables internal bias to reduce quiescent current by ~90%; Shutdown forces outputs low while preserving logic state |
| Input overvoltage tolerance (VIN + 0.3 V) | Eliminates need for external clamping diodes when used with bootstrap or high-side gate drivers |
| Thermal shutdown at 155°C | Prevents destructive thermal runaway during short-circuit or excessive duty-cycle conditions |
Applications
| Motor Drive Interface | Switching Power Supply Gate Driver |
|---|---|
Use Scenario: Driving N-channel MOSFETs in H-bridge motor control for DC brush motors or stepper phases. IC Role / Device Role / Timing Role: Dual non-inverting driver providing isolated gate drive signals with matched propagation delay for direction and enable control. Use Value: Eliminates cross-conduction risk via independent channel control and fast 25 ns switching edges, improving efficiency and reducing heat generation in 24 V industrial actuators. |
Use Scenario: Gate driving synchronous rectifiers or primary-side switches in 100–200 kHz flyback or forward converters. IC Role / Device Role / Timing Role: High-current, low-delay driver delivering precise timing alignment between control IC and power stage. Use Value: 3.0 A peak output sustains gate charge delivery under heavy capacitive loads, maintaining stable duty cycle and minimizing dead-time distortion. |
| Industrial PWM Load Control | Programmable Power Sequencing |
Use Scenario: Controlling resistive or inductive heating elements using PWM-based power regulation in PLC I/O modules. IC Role / Device Role / Timing Role: Robust dual-channel driver interfacing microcontroller PWM outputs with high-side/high-current load switches. Use Value: Wide 5–35 V supply range allows direct operation from unregulated 24 V rails; thermal shutdown prevents field failures during overload events. |
Use Scenario: Enabling/disabling multiple power domains in embedded systems using sequenced enable signals. IC Role / Device Role / Timing Role: Dual-output driver with independent Enable and Shutdown inputs for hierarchical power-up/down sequencing. Use Value: Separate Enable (UVLO) and Shutdown (output-force-low) functions allow safe, controlled ramp-up of downstream regulators and FETs without voltage spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel power driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC2708DW | Same SOIC-16 package and pinout; rated for –40°C to 85°C industrial temperature range vs. UC3708DW's 0°C to 70°C | Preferred for extended-temperature environments like outdoor automation or transportation electronics | Select UC2708DW when operating ambient exceeds 70°C or requires wider cold-start capability |
| UC3707DW | Inverting output configuration (vs. UC3708DW's non-inverting); otherwise identical SOIC-16 footprint, timing, and drive strength | Used where logic polarity inversion is required upstream or downstream in the signal chain | Choose UC3707DW only when system-level logic demands inverted output behavior - not a drop-in replacement |
Compared with UC3708DW, UC2708DW offers broader temperature resilience but identical electrical performance, while UC3707DW provides matching drive capability with inverted logic polarity - requiring PCB-level signal re-routing or firmware adjustment.
Availability
UC3708DW is available at Aetrix Electronics and suitable for motor control, switching power supply design, industrial PWM load management, and programmable power sequencing requiring stable component supply across commercial temperature ranges.
Supply support for UC3708DW 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in industrial and automotive electronics.
The UC3708DW belongs to TI's UC1708/UC2708/UC3708 family of high-speed dual power drivers, engineered specifically for robust gate driving of power MOSFETs in cost-sensitive commercial motor and power conversion applications.
FAQ
What is the operating temperature range for UC3708DW?
The UC3708DW is specified for commercial operation from 0°C to 70°C ambient temperature. This range is validated per TI's production test conditions and aligns with its SOIC-16 DW package thermal characteristics. Operation outside this range may affect timing parameters, output drive strength, and thermal shutdown accuracy - always consult the latest TI datasheet revision SLUS171C for derating guidance.
Does UC3708DW support 3.3V logic inputs?
Yes, UC3708DW supports 3.3V logic inputs directly: its A/B inputs meet TTL/CMOS thresholds (low ≤ 0.8 V, high ≥ 2.0 V), and tolerate voltages up to VIN + 0.3 V. With VIN ≥ 5 V, a 3.3V microcontroller GPIO can safely drive Input A or Input B without level shifting - confirmed by TI's electrical characteristics table under "A, B and shutdown inputs high level" (min 2.0 V).
How does the Enable pin differ from the Shutdown pin in UC3708DW?
In UC3708DW, the Enable pin (Pin 3) places the entire IC into under-voltage lockout, reducing supply current by ~90% and holding outputs in a self-biasing low-voltage state. The Shutdown pin (Pin 6) only forces both outputs low while leaving internal logic active - allowing immediate resumption of normal operation upon deassertion. This distinction enables flexible power-state management in UC3708DW-based systems.
Can UC3708DW drive both high-side and low-side N-MOSFETs simultaneously?
UC3708DW can drive low-side N-MOSFETs directly. For high-side N-MOSFETs, it requires an external floating supply (e.g., bootstrap capacitor or isolated DC-DC) because its outputs are referenced to Pwr Gnd A/B, not a floating source. The datasheet confirms UC3708DW is optimized for low-side or complementary half-bridge configurations with external high-side bias - not standalone high-side drive.
Is UC3708DW RoHS compliant and what is its lead finish?
Yes, UC3708DW is RoHS compliant (lead-free). Per TI's packaging documentation, its SOIC-16 DW package uses NiPdAu (Nickel-Palladium-Gold) lead finish, qualified to JEDEC Level-2 moisture sensitivity with peak reflow at 260°C. The part marking "UC3708DW" appears on the top surface, and tape-and-reel packaging (UC3708DWTR.A) uses 16 mm reel width and Q1 pin-1 quadrant orientation.
UC3708DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- N-Channel, P-Channel MOSFET
- Voltage - Supply:
- 5V ~ 35V
- Logic Voltage - VIL, VIH:
- 0.8V, 2V
- Current - Peak Output (Source, Sink):
- 3A, 3A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 25ns, 25ns
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
UC3708DW FAQ
1.How can I place an order for UC3708DW through Aetrix?
Please submit a Request for Quotation (RFQ) for UC3708DW 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 UC3708DW reliable?
The price and inventory of UC3708DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC3708DW is usually 5 days.
3.What payment methods are accepted for UC3708DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC3708DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC3708DW?
UC3708DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC3708DW 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 UC3708DW?
For technical support, including UC3708DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC3708DW requirements.
6.How does Aetrix verify that UC3708DW is sourced from the original manufacturer or authorized distributors?
All UC3708DW 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 UC3708DW meets industry standards.
7.What is the process for return or replacement of UC3708DW?
All UC3708DW units undergo pre-shipment inspection (PSI). If there is an issue with UC3708DW, 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 UC3708DW part is unused and in its original packaging.
Return procedure for UC3708DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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