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Texas Instruments UC3708NE
- Part No.:
- UC3708NE
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
UC3708NE.pdf
- Description:
- IC GATE DRVR LOW-SIDE 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:107
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Product details
Overview
UC3708NE from Texas Instruments is a dual non-inverting power driver IC designed to interface TTL/CMOS logic with high-power MOSFETs in switching applications. It delivers 3.0 A peak output current per channel, operates from 5 V to 35 V supply, features 25 ns rise/fall times and propagation delays, and includes independent enable and shutdown controls for robust system-level power management in motor gate drive and DC-DC converter circuits.
For engineers reviewing the UC3708NE datasheet, UC3708NE pinout, UC3708NE application, or UC3708NE equivalent, this page provides verified technical context, package-specific pin mapping (16-pin PDIP), real-world application scenarios, and validated alternative options - all grounded in TI's SLUS171C datasheet and official packaging documentation.
Technical Context
The UC3708NE implements two independent totem-pole output stages with Schottky-process high-voltage transistors, enabling efficient high-frequency switching up to 200 kHz. Each channel accepts logic-level inputs compatible with TTL and CMOS, tolerating input voltages up to VIN, and supports simultaneous or independent control via Input A/B, Enable, and Shutdown terminals.
Its internal bias network maintains stable operation across 0°C to 70°C ambient, while thermal shutdown activates at 155°C junction temperature and under-voltage lockout engages when Enable falls below 1.0 V (falling) or rises above 3.6 V (rising). The device exhibits low cross-conduction current spikes and ESD protection rated to 2 kV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 35 V - supports wide-input industrial and automotive DC-DC pre-regulator stages without external regulation. |
| Peak Output Current | 3.0 A per channel - drives medium-power N-channel MOSFET gates directly without external buffers. |
| Rise/Fall Time | 25 ns (typ.) - enables clean 200 kHz switching with minimal overlap loss in half-bridge configurations. |
| Propagation Delay | 25 ns (typ., CL = 0 pF) - ensures tight timing alignment between logic input and power-stage activation. |
| Thermal Shutdown Threshold | 155°C - protects against sustained overload or poor heatsinking in enclosed power modules. |
| Enable Threshold (Rising) | 2.8 V to 3.6 V - allows direct interfacing with 3.3 V microcontroller GPIO without level-shifting. |
| Input Voltage Tolerance | –0.3 V to (VIN + 0.3 V) - permits safe operation with input signals exceeding VCC during transient conditions. |
Pinout & Package
UC3708NE is housed in a 16-pin plastic dual in-line package (PDIP-N), 0.300-inch width, with standard through-hole mounting and RoHS-compliant NiPdAu lead finish. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No Connect | Internally unconnected; must remain floating or tied to GND per layout best practice. |
| 2 - Input A | Channel A Logic Input | Accepts TTL/CMOS-compatible signal to control Output A; withstands voltage up to VIN. |
| 3 - Enable | Global Enable Control | Low-active input that places entire device in under-voltage lockout, reducing supply current by ~90%. |
| 4 - Logic Gnd | Digital Reference Ground | Reference node for all logic inputs and internal bias; separate from power ground paths. |
| 5 - NC | No Connect | Internally unconnected; no external connection required. |
| 6 - Shutdown | Output Disable Control | High-active input forcing both outputs low without affecting internal logic state or bias. |
| 7 - Input B | Channel B Logic Input | Independent control input for Output B; electrically identical to Input A. |
| 8 - NC | No Connect | Internally unconnected; leave unconnected. |
| 9 - Pwr Gnd A | Power Return for Output A | Dedicated ground path for Output A current; minimizes noise coupling into logic section. |
| 10 - Output A | Channel A Power Output | Totem-pole driver capable of sourcing/sinking 3.0 A peak; connects directly to MOSFET gate. |
| 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 | Independent totem-pole output with identical specs to Output A; supports dual-gate or push-pull drive. |
| 13 - Pwr Gnd B | Power Return for Output B | Dedicated return path for Output B current; enables separation of high-current ground loops. |
| 14–16 - NC | No Connect | All three pins are internally unconnected; no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent totem-pole outputs | Enables synchronous or asymmetric control of two power switches without shared timing constraints. |
| 3.0 A peak source/sink capability | Drives gate capacitance of MOSFETs up to ~4.7 nF at 200 kHz without external buffers. |
| Enable and Shutdown functions | Enable reduces quiescent current by >90%; Shutdown forces outputs low while preserving input logic state. |
| 25 ns propagation delay & edge times | Minimizes dead-time uncertainty and improves efficiency in high-frequency half-bridge topologies. |
| Thermal shutdown + UVLO protection | Prevents latch-up or thermal runaway during overloads, startup faults, or supply brownouts. |
Applications
| Motor Gate Drive | DC-DC Converter Driver |
|---|---|
Use Scenario: Driving high-side and low-side N-channel MOSFETs in a 48 V BLDC motor inverter stage. IC Role / Device Role / Timing Role: Dual-channel non-inverting driver providing isolated gate control with matched propagation delays to minimize shoot-through risk. Use Value: 25 ns timing precision and 3.0 A peak current reduce gate charge time and conduction losses at 20 kHz PWM frequency. |
Use Scenario: Controlling synchronous rectifiers in an isolated forward converter operating at 100–200 kHz. IC Role / Device Role / Timing Role: Totem-pole driver delivering fast, high-current gate pulses to low-RDS(on) MOSFETs on primary and secondary sides. Use Value: Low cross-conduction current spike and independent shutdown allow precise dead-time management and fault-safe disable. |
| Industrial PLC Output Stage | UPS Half-Bridge Control |
Use Scenario: Amplifying microcontroller PWM outputs to drive IGBTs in a programmable logic controller's solid-state output module. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between 3.3 V logic and 600 V IGBT gates. Use Value: Input voltage tolerance up to VIN and thermal shutdown protect against IGBT desaturation faults and ambient overheating. |
Use Scenario: Driving complementary MOSFET pairs in a 12 V input, 24 V output online UPS inverter stage. IC Role / Device Role / Timing Role: Dual-channel driver ensuring matched turn-on/turn-off timing for zero-voltage switching transitions. Use Value: 25 ns rise/fall times and 5–35 V supply range support wide battery voltage swing during AC failover events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual non-inverting power driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3708DW | SOIC-16 package, RoHS-compliant NiPdAu finish, MSL Level-2 reflow rating. | Suitable for surface-mount production; lacks through-hole mechanical robustness for high-vibration environments. | Select UC3708DW for automated SMT assembly; UC3708NE remains preferred for prototyping, repair, or ruggedized designs. |
| UC2708N | 8-pin PDIP, single-channel output, 0°C to 85°C industrial temp range, no Shutdown pin. | Requires two units for dual-channel use; lacks independent shutdown control and logic ground separation. | Choose UC2708N only when space or cost constraints force single-channel implementation with duplicated ICs. |
Compared with UC3708DW and UC2708N, the UC3708NE uniquely combines 16-pin PDIP mechanical reliability, integrated dual-channel control with dedicated logic/power grounds, and full enable/shutdown functionality - making it optimal for industrial gate drive where layout simplicity and fault resilience are critical.
Availability
UC3708NE is available at Aetrix Electronics and suitable for motor gate drive, DC-DC converter driver, and industrial PLC output stage applications requiring stable component supply and long-term obsolescence management.
Supply support for UC3708NE 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 decades of heritage in high-reliability interface ICs.
The UC3708NE belongs to TI's UC1708/UC2708/UC3708 family of high-speed power drivers, engineered specifically for robust gate driving of power MOSFETs and IGBTs in industrial motor control and switched-mode power supply systems.
FAQ
What is the maximum operating temperature for the UC3708NE?
The UC3708NE is rated for commercial operation from 0°C to 70°C ambient temperature. Its internal thermal shutdown activates at 155°C junction temperature, providing protection beyond ambient limits. Derating curves in the SLUS171C datasheet define safe continuous operation based on PCB copper area and airflow - critical for sustained 3.0 A output current in enclosed enclosures.
Does the UC3708NE support 3.3 V logic inputs?
Yes, the UC3708NE supports 3.3 V logic inputs directly. Its Input A and Input B thresholds are specified at 0.8 V (low) and 2.0 V (high), fully compatible with standard 3.3 V CMOS outputs. No level-shifting circuitry is needed, and inputs tolerate voltages up to VIN, allowing safe operation even if logic signals exceed VCC during transients.
How does the Enable pin differ from the Shutdown pin on the UC3708NE?
The Enable pin is low-active and places the UC3708NE into under-voltage lockout, reducing total supply current by up to 90% while holding outputs in a self-biasing low-voltage state. The Shutdown pin is high-active and forces both outputs low immediately without affecting internal bias or logic state - ideal for fast fault response without resetting control logic.
Can the UC3708NE drive IGBTs directly?
Yes, the UC3708NE can drive small-to-medium IGBTs directly. With 3.0 A peak source/sink current and 25 ns edge speeds, it adequately charges/discharge IGBT gates with Qg ≤ 120 nC at switching frequencies up to 20 kHz. For higher Qg devices or >50 kHz operation, external gate resistors or buffer stages are recommended to manage Miller plateau crossing.
Is the UC3708NE pin-compatible with other members of the UC1708/UC2708 family?
No - the UC3708NE (16-pin PDIP-N) is not pin-compatible with UC1708 (8-pin or 16-pin CDIP) or UC2708N (8-pin PDIP). Pin count, pin function assignment (e.g., NC positions), and thermal design differ significantly. The UC3708DW (16-pin SOIC-DW) shares identical pinout and function but differs in package type and reflow profile - confirming functional equivalence but not mechanical interchangeability.
UC3708NE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
UC3708NE FAQ
1.How can I place an order for UC3708NE through Aetrix?
Please submit a Request for Quotation (RFQ) for UC3708NE 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 UC3708NE reliable?
The price and inventory of UC3708NE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC3708NE is usually 5 days.
3.What payment methods are accepted for UC3708NE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC3708NE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC3708NE?
UC3708NE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC3708NE 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 UC3708NE?
For technical support, including UC3708NE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC3708NE requirements.
6.How does Aetrix verify that UC3708NE is sourced from the original manufacturer or authorized distributors?
All UC3708NE 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 UC3708NE meets industry standards.
7.What is the process for return or replacement of UC3708NE?
All UC3708NE units undergo pre-shipment inspection (PSI). If there is an issue with UC3708NE, 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 UC3708NE part is unused and in its original packaging.
Return procedure for UC3708NE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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