Texas Instruments UC1714J

Overview

UC1714J 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 - enabling zero-voltage switching in forward and flyback converters.

For engineers reviewing the UC1714J datasheet, UC1714J pinout, UC1714J application, or UC1714J equivalent, key selection criteria include timing delay configurability (T1/T2), true zero-voltage sensing via timer pins, active-low PWR output behavior in sleep mode, and compatibility with N-channel + P-channel complementary gate drive topologies.

Technical Context

The UC1714J implements dual-output timing control using internal current-limited timer inputs (T1, T2) that set programmable dead-time between AUX and PWR transitions. Its logic architecture ensures AUX switches on at INPUT rising edge while PWR activates after T1 delay, and PWR turns off immediately at INPUT falling edge while AUX deactivates after T2 delay.

Each output includes dedicated saturation voltage specs: PWR delivers ≤0.8 V low-state drop at 40 mA and ≤2.8 V high-state drop at −200 mA; AUX achieves ≤0.8 V low at 20 mA and ≥2.3 V high at −100 mA. The ENBL pin enables 220-μA sleep mode with PWR held active-low regardless of VCC level when ENBL ≤0.8 V.

Key Specifications

Pinout & Package

UC1714J is housed in an 8-pin DIL (J package), with pin 1 designated as VCC and pin 8 as GND. The package supports through-hole mounting and meets industrial temperature range requirements (−55°C to +125°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UC2714D and UC3714D, UC1714J offers the widest operating junction temperature range (−55°C to +125°C), making it uniquely suitable for aerospace, military, and high-reliability industrial systems where thermal extremes demand extended qualification.

Availability

UC1714J is available at Aetrix Electronics and suitable for forward converters, synchronous rectifiers, active clamp topologies, and zero-voltage switching power supplies requiring stable component supply across extended temperature ranges.

Supply support for UC1714J 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 for industrial, automotive, and communications markets.

The UC1714J belongs to TI's legacy complementary FET driver product line, engineered specifically for high-efficiency, soft-switching power conversion topologies requiring precise, independent timing control between dual gate-drive outputs.

FAQ

What is the operating temperature range of the UC1714J?

The UC1714J is specified for operation from −55°C to +125°C junction temperature. This extended range supports deployment in harsh environments such as aerospace avionics, military power systems, and high-temperature industrial controls where standard industrial-grade drivers would fail.

How does the UC1714J implement zero-voltage switching (ZVS) support?

The UC1714J implements ZVS support via its T1 and T2 pins, which provide true zero-voltage sensing capability. When either pin is pulled below its nominal 3-V threshold (e.g., by an external comparator detecting zero voltage), the corresponding output activates immediately - eliminating fixed delay and enabling deterministic ZVS turn-on in resonant and active-clamp topologies.

What is the function of the ENBL pin on the UC1714J?

The ENBL pin on the UC1714J enables a 220-μA sleep mode when driven to ≤0.8 V. In this state, the PWR output is held active-low regardless of VCC level or INPUT signal, ensuring safe default behavior while minimizing standby power - critical for energy-efficient power supply designs.

Can the UC1714J drive both N-channel and P-channel MOSFETs simultaneously?

Yes - the UC1714J is explicitly designed for complementary drive: its PWR output drives N-channel MOSFETs (active-low), while its inverted AUX output directly drives P-channel MOSFETs. This eliminates need for external inverters or level shifters in synchronous rectifier and active clamp circuits.

What package type is used for the UC1714J?

The UC1714J uses an 8-pin DIL (dual in-line) through-hole package, designated "J" in TI's packaging nomenclature. It is distinct from the SOIC-8 "D" package variants (e.g., UC2714D) and supports legacy board designs requiring through-hole mounting and extended temperature reliability.