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Texas Instruments UC3714D
- Part No.:
- UC3714D
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
UC3714D.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,280
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Product details
Overview
UC3714D from Texas Instruments is a high-speed complementary switch FET driver IC designed for synchronous rectification and active clamp/reset circuits. It features independently programmable 50–500 ns delays between AUX and PWR outputs, 1-A source / 2-A sink power driver capability, 0.5-A source / 1-A sink auxiliary driver, TTL-compatible INPUT, and ENBL-activated 220-μA sleep mode. It operates in 0°C to 70°C ambient and supports up to 1 MHz switching frequency in DC/DC converters.
For engineers reviewing the UC3714D datasheet, UC3714D pinout, UC3714D application, or UC3714D equivalent, this page delivers verified timing parameters, true zero-voltage sensing capability at T1/T2 pins, SOIC-8 package details, propagation delay specs (≤100 ns), and functional distinctions versus UC1714/UC2714 families for synchronous rectifier design validation.
Technical Context
The UC3714D implements dual-output gate drive with independent delay control via external resistors on T1 (AUX→PWR) and T2 (PWR→AUX), enabling precise dead-time management in complementary-switch topologies. Its internal timing architecture uses self-biased current sources with nominal 3-V threshold and ±1-mA current limiting at T1/T2 pins.
It supports true zero-voltage sensing by detecting voltage drop below 2.5 V at T1/T2 to trigger immediate output switching-bypassing programmed delay-and integrates passive self-biasing on PWR to hold it active-low during ENBL ≤0.8 V, regardless of VCC level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 7 V to 20 V - supports wide-input industrial and telecom power rails without external regulation |
| PWR Output Drive | 1-A source / 2-A sink - directly drives N-channel MOSFET gates up to ~10 nF load at <100 ns rise/fall |
| AUX Output Drive | 0.5-A source / 1-A sink - suitable for auxiliary switches or P-channel gate control in active clamp circuits |
| Programmable Delay Range | 50 ns to 500 ns per output - set independently via RT1/RT2 resistors (10 kΩ to 100 kΩ to GND) |
| Propagation Delay (PWR) | 35 ns to 100 ns - ensures tight timing control between INPUT edge and PWR transition under load |
| Sleep Mode Current | 200–300 µA - enables low-power standby in battery-backed or energy-sensitive systems |
| Operating Temperature | 0°C to 70°C - specified for commercial-grade power supply applications, distinct from industrial −40°C to 85°C UC27xx variants |
Pinout & Package
UC3714D is housed in an 8-pin SOIC (D) package with standard 1.27-mm pitch and JEDEC MS-012AC footprint. Pin 1 is marked with a beveled corner or dot; thermal pad is not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Bypassed to GND with ≥0.1 µF ceramic capacitor; powers both drivers and internal logic |
| 2 - PWR | Main power FET gate driver output | Active-low in sleep mode; sinks 2 A peak for N-MOSFET turn-on; includes passive self-bias circuit |
| 3 - GND | Power and signal reference | Carries full peak sinking current; must be low-inductance connection to minimize ground bounce |
| 4 - AUX | Auxiliary FET gate driver output | Inverted relative to INPUT rising edge; sources 0.5 A for P-MOSFET or sinks 1 A for N-MOSFET |
| 5 - ENBL | Enable/disable control input | TTL-compatible (0.8–1.2 V threshold); pulls device into 220-µA sleep mode when ≤0.8 V |
| 6 - INPUT | PWM signal input | Accepts 0–20 V swing; rising edge triggers AUX immediately and starts T1 delay to PWR; falling edge turns off PWR and starts T2 delay to AUX |
| 7 - T1 | Delay programming / zero-voltage sense input | Resistor-to-GND sets AUX→PWR delay; pulled below 2.5 V to enable immediate PWR activation at zero voltage |
| 8 - T2 | Delay programming / zero-voltage sense input | Resistor-to-GND sets PWR→AUX delay; pulled below 2.5 V to enable immediate AUX activation post-PWR turnoff |
Key Features
| Feature | Design Value |
|---|---|
| Independent T1/T2 delay control | Enables precise dead-time tuning for ZVS in forward, LLC, and active-clamp topologies without external logic |
| True zero-voltage sensing at T1/T2 | Eliminates fixed dead-time overhead by triggering output transitions only when drain-source voltage crosses zero |
| Self-biased PWR output in sleep mode | Maintains safe default state (low) on main switch during disable-no external pull-down required |
| 1-MHz capable switching | Validated propagation and slew performance supports high-frequency designs like GaN-based adapters and telecom PSUs |
| TTL-compatible INPUT and ENBL | Direct interface with UC384x, UCC28xx, and other PWM controllers without level-shifting components |
Applications
| Forward Converter Active Clamp | Synchronous Rectification (Buck) |
|---|---|
Use Scenario: Forward converter with active reset using an N-channel MOSFET to replace the reset winding and diode. IC Role / Device Role / Timing Role: UC3714D drives the active clamp switch (PWR) and auxiliary clamp/FET (AUX) with precisely timed, non-overlapping gate signals to achieve zero-voltage switching during reset. Use Value: Reduces reset losses and EMI by eliminating voltage spikes across the main switch; enables higher efficiency (>92%) and smaller magnetics. |
Use Scenario: High-efficiency buck regulator for FPGA core voltage where conduction loss dominates. IC Role / Device Role / Timing Role: UC3714D controls high-side and low-side N-MOSFETs as synchronous rectifier pair, with T1/T2 delays preventing shoot-through while supporting 500-kHz–1-MHz operation. Use Value: Achieves >3% efficiency gain over Schottky rectification at 12 V input / 1.2 V output, 20 A load, due to reduced RDS(on) conduction loss. |
| LLC Resonant Converter Reset | Isolated DC/DC with Active Clamp Reset |
Use Scenario: Secondary-side synchronous rectification in LLC resonant converters used in server PSUs. IC Role / Device Role / Timing Role: UC3714D drives two N-channel MOSFETs on the secondary side, using INPUT edge-triggered timing and T2 delay to align gate drive with resonant tank zero-crossing. Use Value: Enables adaptive synchronous rectification without complex controller integration-reduces BOM count and improves light-load efficiency by >5%. |
Use Scenario: Isolated 48 V–12 V DC/DC module with active clamp reset on primary side and synchronous rectification on secondary. IC Role / Device Role / Timing Role: UC3714D manages primary-side active clamp switch timing (PWR) and auxiliary clamp path (AUX), with T1/T2 delays tuned to match transformer leakage inductance and clamp capacitor dynamics. Use Value: Eliminates need for discrete timing RC networks or dedicated clamp controllers-reduces layout complexity and improves reliability across line/load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar complementary FET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC2714D | Wider temperature range (−40°C to 85°C); identical pinout, timing, and drive specs; same SOIC-8 package | Preferred for industrial environments requiring extended ambient operation; shares same PCB layout | Select UC2714D when operating outside 0°C–70°C or needing broader qualification coverage |
| UC3715D | True complementary output configuration (non-inverted AUX); otherwise identical timing, drive strength, and package | Required when driving two N-channel MOSFETs in fully complementary mode (e.g., half-bridge synchronous rectifier) | Choose UC3715D only if AUX polarity must match INPUT (not inverted), as in N-N synchronous rectifier topologies |
Compared with UC2714D, UC3714D trades industrial temperature rating for cost-optimized commercial qualification; compared with UC3715D, it provides inverted AUX output essential for P-channel auxiliary switch control in active clamp circuits-making UC3714D uniquely suited for asymmetric complementary drive where AUX must oppose INPUT polarity.
Availability
UC3714D is available at Aetrix Electronics and suitable for forward converters, synchronous buck regulators, LLC resonant supplies, and isolated DC/DC modules requiring stable component supply across production lifecycles.
Supply support for UC3714D 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 delivering analog, embedded processing, and connectivity solutions with emphasis on power management and industrial control ICs.
The UC37xx family was developed specifically for high-frequency, zero-voltage-switching power conversion-targeting synchronous rectification, active clamp reset, and soft-switching topologies in commercial-grade AC/DC and DC/DC systems.
FAQ
What is the maximum switching frequency supported by the UC3714D?
The UC3714D is characterized for operation up to 1 MHz, with typical propagation delays ≤100 ns and rise/fall times ≤60 ns under 2200-pF load. This enables use in high-frequency DC/DC converters such as GaN-based adapters and telecom power modules where fast timing control is critical to maintain efficiency and stability.
How does the UC3714D implement true zero-voltage sensing?
The UC3714D implements true zero-voltage sensing through its T1 and T2 pins: when either pin is pulled below 2.5 V (e.g., via voltage divider from switch node), the corresponding output activates immediately-bypassing the programmed RC delay. This allows direct detection of zero-drain-voltage conditions in synchronous rectifiers or active clamp circuits without external comparators.
What is the function of the ENBL pin on the UC3714D?
The ENBL pin on the UC3714D enables low-power sleep mode: when held ≤0.8 V, it reduces ICC to 200–300 µA and forces the PWR output into a passive active-low state. The AUX output goes high-impedance. This feature supports burst-mode operation and standby power reduction in AC/DC adapters and USB PD designs using UC3714D.
Can the UC3714D drive both N-channel and P-channel MOSFETs simultaneously?
Yes-the UC3714D's inverted AUX output and active-low PWR output allow direct drive of an N-channel main switch (via PWR) and a P-channel auxiliary switch (via AUX). This configuration is explicitly validated in TI's Figure 11 and Figure 12 for active clamp forward converters and synchronous buck topologies using UC3714D.
What package type and footprint does the UC3714D use?
The UC3714D uses an 8-pin SOIC (D) package per JEDEC MS-012AC, with 1.27-mm lead pitch and 3.9-mm body width. It is compatible with standard SOIC-8 footprints and reflow profiles (MSL Level-2, 250°C peak). Pin 1 orientation follows quadrant Q1 tape-and-reel assignment per TI's packaging documentation for UC3714D.
UC3714D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel, P-Channel MOSFET
- Voltage - Supply:
- 7V ~ 20V
- Logic Voltage - VIL, VIH:
- 0.8V, 2V
- Current - Peak Output (Source, Sink):
- 1A, 2A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 30ns, 25ns
- Operating Temperature:
- 0°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
UC3714D FAQ
1.How can I place an order for UC3714D through Aetrix?
Please submit a Request for Quotation (RFQ) for UC3714D 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 UC3714D reliable?
The price and inventory of UC3714D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC3714D is usually 5 days.
3.What payment methods are accepted for UC3714D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC3714D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC3714D?
UC3714D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC3714D 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 UC3714D?
For technical support, including UC3714D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC3714D requirements.
6.How does Aetrix verify that UC3714D is sourced from the original manufacturer or authorized distributors?
All UC3714D 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 UC3714D meets industry standards.
7.What is the process for return or replacement of UC3714D?
All UC3714D units undergo pre-shipment inspection (PSI). If there is an issue with UC3714D, 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 UC3714D part is unused and in its original packaging.
Return procedure for UC3714D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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