Texas Instruments UC2714N

Overview

UC2714N 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 industrial temperature range (–40°C to +85°C) and targets zero-voltage switching (ZVS) power converters.

For engineers reviewing the UC2714N datasheet, UC2714N pinout, UC2714N application, or UC2714N equivalent, this page delivers verified timing parameters, confirmed dual-output delay architecture, real-world ZVS implementation guidance, and validated alternatives for synchronous buck, forward, and active-clamp topologies.

Technical Context

The UC2714N implements a two-stage gate-drive architecture with independent T1 (AUX→PWR) and T2 (PWR→AUX) delay control via external resistors to ground. Its propagation delays are tightly specified: 35–100 ns for PWR, 35–80 ns for AUX, with typical 50-ns overall delay consistency across temperature.

It supports true zero-voltage sensing by pulling T1/T2 below 2.5 V to immediately activate corresponding outputs-enabling adaptive dead-time control without external logic. The ENBL pin enables 220-μA sleep mode where PWR output remains active-low while AUX goes high-impedance.

Key Specifications

Pinout & Package

UC2714N is housed in an 8-pin PDIP (Plastic Dual In-line Package), with 0.3-inch body width and standard through-hole mounting. Pin spacing is 0.1 inch (2.54 mm), compatible with legacy PCB layouts and manual prototyping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UC2714N, UC2715N provides matched N-channel drive polarity essential for dual-N synchronous rectifiers, while UC3714N trades industrial temperature rating for lower unit cost-neither offers pin-to-pin replacement without verifying system-level thermal and timing margins.

Availability

UC2714N is available at Aetrix Electronics and suitable for forward converters, synchronous buck regulators, isolated DC/DC modules, and active-clamp flyback designs requiring stable component supply and long-term industrial-grade availability.

Supply support for UC2714N 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 high-reliability power control solutions.

The UC2714N belongs to TI's Complementary Switch FET Driver product line, engineered specifically for zero-voltage switching topologies in industrial and telecom power supplies where timing precision and robust gate drive are critical.

FAQ

What is the function of the T1 and T2 pins on the UC2714N?

The T1 and T2 pins on the UC2714N serve dual functions: they program independent 50–500 ns delays between AUX and PWR outputs via external resistors to GND, and act as true zero-voltage sensing inputs-pulling either pin below 2.5 V immediately triggers the corresponding output. This enables adaptive dead-time control without external circuitry. The UC2714N datasheet confirms T1 nominal voltage is 3.0 V with ±0.3 V tolerance and current limit of –2 mA.

Does the UC2714N support both N-channel and P-channel MOSFETs on the AUX output?

Yes-the UC2714N's AUX output is inverted relative to INPUT, making it directly compatible with p-channel MOSFETs in synchronous rectifier configurations without level-shifting. When driving N-channel devices, the inversion requires complementary PWM signal phasing. This behavior is explicitly documented in the UC2714N datasheet's PIN DESCRIPTIONS section and distinguishes it from the UC2715N variant.

What happens to the PWR output during ENBL-sleep mode on the UC2714N?

When ENBL is pulled ≤0.8 V, the UC2714N enters 220-μA sleep mode and forces the PWR output into a defined active-low state-regardless of VCC voltage or INPUT signal-while AUX goes high-impedance. This fail-safe behavior prevents unintended main-switch turn-on during controller reset or brownout. The UC2714N electrical characteristics table specifies PWR output low saturation voltage as 0.3–0.8 V at 40 mA sink.

Can the UC2714N be used in a 1-MHz switching power supply?

Yes-the UC2714N is characterized for operation up to 1 MHz, with typical 50-ns propagation delays and rise/fall times of 30–60 ns (PWR) and 45–60 ns (AUX) under 2200 pF and 1000 pF loads respectively. Its drive strength (1-A source / 2-A sink) sustains fast gate charging at high frequency, and the datasheet's Figure 3 confirms stable ICC vs. switching frequency up to 1 MHz with no load.

How does the UC2714N differ from the UC1714J in terms of temperature rating and packaging?

The UC2714N is rated for –40°C to +85°C operation and packaged in an 8-pin PDIP (P package), whereas the UC1714J is rated for –55°C to +125°C and uses an 8-pin CDIP (J package). Both share identical functional architecture and pinout, but UC2714N targets industrial applications with cost-optimized plastic packaging, while UC1714J serves extended-temperature military/aerospace use cases. The UC2714N's LIFEBUY status indicates planned discontinuation with last-time-buy availability.