Texas Instruments UC2714DTR/81306

Overview

UC2714DTR/81306 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 power (PWR) and auxiliary (AUX) outputs, 1-A source / 2-A sink PWR drive capability, 0.5-A source / 1-A sink AUX drive, TTL-compatible INPUT, and ENBL-controlled 220-μA sleep mode. It operates across –40°C to +85°C in SOIC-8 packaging for zero-voltage switching topologies.

For engineers reviewing the UC2714DTR/81306 datasheet, UC2714DTR/81306 pinout, UC2714DTR/81306 application, or UC2714DTR/81306 equivalent, key selection criteria include delay configurability per output, true-zero-voltage sensing via T1/T2 pins, propagation delays under 100 ns, dual-output timing independence, and compatibility with N-channel synchronous rectifier designs requiring precise dead-time control.

Technical Context

The UC2714DTR/81306 implements a dual-output gate driver architecture where the AUX output switches immediately on INPUT rising edge and after T2 delay on INPUT falling edge, while the PWR output activates after T1 delay on INPUT rising edge and turns off immediately on INPUT falling edge. Timing delays are set by external resistors to GND on T1 and T2 pins, with nominal internal voltage of 3 V and current limit of –2 mA.

It supports true-zero-voltage operation by allowing T1/T2 pins to be pulled below 2.5 V to trigger immediate output activation - bypassing programmed delay - enabling adaptive switching in resonant converters. The device uses passive self-biased circuitry to hold PWR low during ENBL ≤0.8 V, ensuring safe inactive-state behavior without external pull-downs.

Key Specifications

Pinout & Package

UC2714DTR/81306 is housed in an 8-pin SOIC (D) package with standard JEDEC outline, 1.27 mm pitch, and RoHS-compliant NiPdAu lead finish. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar complementary FET driver applications.

Compared with UC2714DTR/81306, UC2715DTR provides matching performance with non-inverted AUX output for dual-N-FET topologies, while UC3714DTR offers identical functionality at reduced temperature rating - making UC2714DTR/81306 the sole choice for industrial (-40°C to +85°C) synchronous rectifier and active clamp designs requiring inverted AUX timing.

Availability

UC2714DTR/81306 is available at Aetrix Electronics and suitable for forward converters, LLC resonant supplies, isolated flyback with active clamp, and synchronous buck regulators requiring stable component supply, long-term lifecycle support, and traceable industrial-grade sourcing.

Supply support for UC2714DTR/81306 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 company specializing in analog, embedded processing, and power management technologies, with decades of leadership in power conversion ICs.

The UC2714DTR/81306 belongs to TI's complementary switch FET driver product line, engineered specifically for high-efficiency soft-switching power topologies including active clamp, synchronous rectification, and resonant converters.

FAQ

What is the operating temperature range of the UC2714DTR/81306?

The UC2714DTR/81306 is specified for operation from –40°C to +85°C, qualifying it for industrial-grade power supply designs. This range is confirmed in the Electrical Characteristics table and PACKAGE OPTION ADDENDUM, distinguishing it from the UC3714 series (0°C to +70°C) and UC1714 series (–55°C to +125°C). Thermal derating is not required within this span when used per recommended layout and thermal guidelines.

How does the UC2714DTR/81306 implement zero-voltage switching detection?

The UC2714DTR/81306 uses its T1 and T2 pins for true zero-voltage sensing: pulling either pin below 2.5 V (e.g., via external comparator output or resistor divider) immediately activates the corresponding output, bypassing the programmed RC delay. This feature enables direct integration with drain-source voltage monitoring circuits to trigger gate drive precisely at V_DS = 0, supporting ZVS in LLC and active-clamp topologies without added controller complexity.

What is the function of the ENBL pin on the UC2714DTR/81306?

The ENBL pin on the UC2714DTR/81306 enables TTL-compatible enable/disable control with a 0.8–1.2 V threshold. When ENBL ≤0.8 V, the device enters sleep mode drawing 200–300 µA, and the PWR output is actively held low regardless of VCC or INPUT state. This ensures fail-safe shutdown of the main power switch during standby or fault conditions without requiring external pull-downs.

Can the UC2714DTR/81306 drive both N-channel and P-channel MOSFETs?

Yes - the UC2714DTR/81306 is configured with inverted AUX output, making it ideal for driving a P-channel MOSFET as the auxiliary switch while controlling an N-channel MOSFET on the PWR output. Its 0.5-A source / 1-A sink AUX drive supports typical P-FET gate requirements, and the 1-A source / 2-A sink PWR output handles standard N-FET gates up to Q_g ≈ 25 nC at 500 kHz switching.

What delay ranges are supported by the T1 and T2 pins of the UC2714DTR/81306?

The T1 and T2 pins of the UC2714DTR/81306 support independently programmable delays from 50 ns to 500 ns, set by external resistors to GND. With RT = 10 kΩ, delay is ~20–80 ns; with RT = 100 kΩ, delay extends to ~350–700 ns. The actual delay includes propagation offset (~35 ns), but relative timing between AUX and PWR is governed solely by RT values, enabling precise dead-time calibration in production.