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Texas Instruments UC2708N
- Part No.:
- UC2708N
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
UC2708N.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,472
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Product details
Overview
UC2708N from Texas Instruments is a dual non-inverting power driver IC designed to interface TTL/CMOS logic with high-current power MOSFETs in motor control, switching power supplies, and half-bridge gate drive applications. It delivers 3.0A peak output current per channel, operates from 5V to 35V supply, features 25ns propagation delays, and includes independent enable and shutdown functions for system-level fault management.
For engineers reviewing the UC2708N datasheet, UC2708N pinout, UC2708N application, or UC2708N equivalent, this page provides verified technical context, package-specific pin mapping (PDIP-8), real-world timing and thermal behavior, functional alternatives with documented differences, and supply-chain support for industrial-grade production deployment.
Technical Context
The UC2708N implements two independent totem-pole output stages with internal biasing and thermal shutdown circuitry. Each channel accepts logic-level inputs compatible with TTL and CMOS families while tolerating input voltages up to VIN, and drives external MOSFET gates with 3.0A sink/source capability under defined thermal limits.
It supports dual control modes: individual channel activation via Input A/B, and global output disable via Enable (under-voltage lockout) or Shutdown (outputs forced low without affecting internal logic). The PDIP-8 package variant lacks the Shutdown function - only Enable is active - as confirmed by TI's package-specific note in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 35 V - supports wide-input DC-DC converters and industrial bus rails without external regulation. |
| Peak Output Current | 3.0 A per channel - sufficient to drive medium-power MOSFETs (e.g., <100 nC gate charge) at high frequency. |
| Propagation Delay | 25 ns typical - enables precise timing control in PWM-based motor drivers and resonant converters. |
| Rise/Fall Time | 25 ns typical - minimizes switching losses and EMI in fast-switching topologies. |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments including factory automation and HVAC controls. |
| Enable Threshold | 3.6 V (rising), 2.4 V (falling) - provides hysteresis for noise-immune power sequencing in multi-rail systems. |
| Thermal Shutdown | 155°C junction - protects against sustained overload or inadequate heatsinking during transient faults. |
Pinout & Package
UC2708N is supplied in an 8-pin plastic dual in-line package (PDIP-8), with 0.3-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; leads are tin-plated, RoHS-compliant NIPDAU finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: Enable | Global output control input | Logic-low disables both outputs and reduces quiescent current by ~90%; no shutdown function in this package. |
| 2: Input A | Channel A logic input | TTL/CMOS-compatible; withstands voltage up to VIN - allows direct connection to microcontroller GPIO or isolated level-shifted signals. |
| 3: Gnd | Logic ground reference | Common return for all logic inputs and internal bias circuits; must be low-impedance and separated from power ground in noise-sensitive designs. |
| 4: Input B | Channel B logic input | Independent of Input A; enables asynchronous or complementary drive of two external switches. |
| 5: NC | No connect | Not internally bonded - must remain unconnected per TI specification; floating or tied to Gnd may cause unpredictable behavior. |
| 6: Output A | Channel A totem-pole output | Sources/sinks up to 3.0 A; connects directly to gate of high-side or low-side N-channel MOSFET. |
| 7: VIN | Main power supply input | Supplies both output stages and internal bias; requires local 10 µF ceramic + bulk capacitor for stability under pulsed load. |
| 8: Output B | Channel B totem-pole output | Electrically isolated from Output A; supports independent switching or synchronous rectification configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent totem-pole outputs | Enables discrete half-bridge or dual-switch topologies without cross-conduction risk - critical for H-bridge motor control. |
| 3.0A peak current per channel | Drives MOSFETs with gate charges ≤80 nC at 100 kHz without external buffers - reduces BOM count and layout area. |
| 25ns propagation delay | Supports >1 MHz PWM operation with minimal dead-time uncertainty - improves efficiency in resonant LLC and ZVS converters. |
| Enable-controlled under-voltage lockout | Reduces supply current to <4 mA during disable - essential for low-power standby modes in energy-conscious industrial equipment. |
| Thermal shutdown at 155°C | Prevents latch-up or silicon damage during overcurrent events - complements external current-sense protection in safety-critical drives. |
Applications
| Brushless DC Motor Control | Switching Power Supply Gate Drive |
|---|---|
|
Use Scenario: Driving upper/lower MOSFETs in a 3-phase inverter stage for HVAC blowers or industrial pumps. IC Role / Device Role / Timing Role: Dual-channel non-inverting driver providing matched rise/fall timing to minimize shoot-through risk during commutation. Use Value: 25ns propagation matching ensures consistent timing across channels, reducing dead-time margin requirements and improving torque linearity. |
Use Scenario: Driving synchronous rectifiers in a 48 V to 12 V isolated DC-DC converter for telecom infrastructure. IC Role / Device Role / Timing Role: High-current gate driver delivering 3.0A peak to low-Rds(on) MOSFETs operating at 200 kHz. Use Value: 25ns rise/fall times reduce switching losses by >15% compared to slower drivers, directly increasing converter efficiency. |
| Industrial PLC Output Modules | DC-AC Inverter Stages |
|
Use Scenario: Controlling solenoid valves or small AC contactors via external power transistors in programmable logic controller I/O cards. IC Role / Device Role / Timing Role: Logic-to-power interface translating 3.3 V/5 V microcontroller outputs into robust 3 A gate drive signals. Use Value: Wide 5–35 V supply range accommodates varying field power rails (24 V DC, 48 V DC) without auxiliary regulation. |
Use Scenario: Driving high-side and low-side IGBTs in single-phase inverters for solar microinverters or UPS systems. IC Role / Device Role / Timing Role: Dual-channel driver enabling complementary switching with precise edge alignment and thermal fault response. Use Value: Integrated thermal shutdown at 155°C provides first-level protection before external thermal sensors activate - shortens fault response time by ~10 ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3708N | Same PDIP-8 package and pinout, but rated for 0°C to +70°C commercial temperature range (vs. UC2708N's –40°C to +85°C). | Lacks industrial-temperature qualification - unsuitable for outdoor or factory-floor deployments with wide ambient swings. | Select UC3708N only for cost-sensitive consumer or lab-grade equipment where ambient stays within 0–70°C. |
| TC4427CPA | Single-channel, 1.5A peak output, SOIC-8 package; no Enable or thermal shutdown; faster 20ns rise time but lower drive strength. | Requires two devices for dual-channel use; no integrated fault protection; higher board area and component count. | Choose TC4427CPA when ultra-fast switching dominates over thermal safety and integration - e.g., low-power Class-D audio amplifiers. |
Compared with UC3708N and TC4427CPA, UC2708N uniquely combines industrial temperature rating, dual-channel integration, 3.0A drive strength, and enable-based power gating - making it optimal for space-constrained, thermally demanding motor and power conversion systems.
Availability
UC2708N is available at Aetrix Electronics and suitable for industrial motor control, switching power supply design, and programmable logic controller output modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UC2708N 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 U.S.-based semiconductor company specializing in analog, embedded processing, and power management technologies, with decades of leadership in high-reliability industrial and automotive ICs.
The UC2708N belongs to TI's legacy UC1708/UC2708/UC3708 family of high-speed power drivers, engineered specifically for robust gate driving in industrial motor control, uninterruptible power supplies, and factory automation systems.
FAQ
Does UC2708N support shutdown functionality?
No - the UC2708N in PDIP-8 package does not implement the Shutdown terminal. As explicitly stated in the TI datasheet, "Shutdown feature is not available in J or N packages only." Only the Enable pin is functional for global output disable. This differs from UC2708DW (SOIC-16) and UC2708JE (CDIP-16), which include full Shutdown capability. Always verify package-specific features before schematic capture.
What is the maximum continuous output current for UC2708N?
The UC2708N is rated for 3.0A peak output current per channel, but continuous current depends on thermal management. At 25°C ambient with no heatsink, the practical continuous limit is ~1.2A per channel due to 155°C thermal shutdown threshold and package thermal resistance (θJA ≈ 70°C/W for PDIP-8). Derating curves in the UC2708N datasheet must be applied for reliable operation above 25°C.
Can UC2708N drive both high-side and low-side N-channel MOSFETs in a half-bridge?
Yes - UC2708N can drive either configuration, but high-side drive requires bootstrap or isolated gate supply since it lacks high-side floating bias circuitry. Its dual non-inverting outputs provide matched timing for complementary switching, and its 5–35V supply range supports common gate-drive rail voltages. For integrated high-side bootstrap, consider dedicated half-bridge drivers like the UCC272xx series instead.
Is UC2708N pin-compatible with UC3708N?
Yes - UC2708N and UC3708N share identical PDIP-8 pinout, electrical interface, and functional block diagram. The key difference lies in temperature rating: UC2708N is specified for –40°C to +85°C (industrial), while UC3708N is rated for 0°C to +70°C (commercial). Electrical parameters (propagation delay, drive strength, thresholds) are identical across both parts per TI's datasheet tables.
What decoupling capacitance is recommended for UC2708N?
Texas Instruments recommends a minimum 10 µF low-ESR electrolytic or tantalum capacitor plus a 100 nF ceramic capacitor placed as close as possible to the UC2708N VIN and GND pins. This combination suppresses supply ripple caused by 3.0A pulsed gate currents and prevents instability during fast switching transitions. Layout guidelines in the UC2708N datasheet emphasize short, wide traces between VIN/GND and the capacitors.
UC2708N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
UC2708N FAQ
1.How can I place an order for UC2708N through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2708N 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 UC2708N reliable?
The price and inventory of UC2708N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2708N is usually 5 days.
3.What payment methods are accepted for UC2708N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2708N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2708N?
UC2708N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2708N 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 UC2708N?
For technical support, including UC2708N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2708N requirements.
6.How does Aetrix verify that UC2708N is sourced from the original manufacturer or authorized distributors?
All UC2708N 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 UC2708N meets industry standards.
7.What is the process for return or replacement of UC2708N?
All UC2708N units undergo pre-shipment inspection (PSI). If there is an issue with UC2708N, 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 UC2708N part is unused and in its original packaging.
Return procedure for UC2708N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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