Texas Instruments UC2714D

Overview

UC2714D 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, and TTL-compatible INPUT/ENBL logic with 220-μA sleep mode current. It operates across –40°C to +85°C and supports up to 1 MHz switching in DC-DC converters and forward topologies.

For engineers reviewing the UC2714D datasheet, UC2714D pinout, UC2714D application, or UC2714D equivalent, key selection considerations include its dual-delay timing architecture, zero-voltage sensing via T1/T2 pins, SOIC-8 package compatibility, and functional distinction from UC1714 (inverted AUX) and UC2715 (true-complementary outputs).

Technical Context

The UC2714D implements a two-stage delay-controlled gate driver architecture: the rising edge of INPUT triggers immediate AUX activation and initiates T1 delay before PWR turn-on; the falling edge of INPUT immediately turns off PWR and initiates T2 delay before AUX reactivation. Timing is set by external resistors on T1/T2 pins, each sourcing ~1 mA at nominal 3 V, enabling precise dead-time control from 50 ns to 500 ns per channel.

It integrates TTL-level input thresholds (INPUT: 0.8–1.4 V, ENBL: 0.8–1.2 V), self-biased PWR output that remains active-low during sleep (ENBL ≤ 0.8 V), and independent saturation voltage specs: VPWR low = 0.3–0.8 V @ 40 mA, VAUX low = 0.3–0.8 V @ 20 mA. Propagation delays are typ. 35–100 ns, with rise/fall times under 60 ns into specified capacitive loads.

Key Specifications

Pinout & Package

UC2714D is housed in an 8-pin SOIC (D) package with standard 1.27 mm pitch and gull-wing leads. Pin 1 is located in quadrant Q1 per tape-and-reel orientation standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UC2714D, UC2715D eliminates AUX inversion for true-complementary N-FET drive but forfeits p-FET compatibility, while UC3714D retains full functional equivalence except for reduced thermal qualification-making UC2714D the sole choice for industrial (-40°C to +85°C) p-FET auxiliary drive with zero-voltage sensing.

Availability

UC2714D is available at Aetrix Electronics and suitable for forward converters, synchronous rectifiers, active-clamp SMPS, and isolated DC-DC modules requiring stable component supply, long-term lifecycle assurance, and traceable industrial-grade sourcing.

Supply support for UC2714D 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 ICs.

The UC2714D belongs to TI's complementary FET driver product line, engineered specifically for zero-voltage switching topologies-including forward, active-clamp flyback, and resonant converters-where precise, independent dead-time control and integrated zero-voltage sensing are critical.

FAQ

What is the maximum operating frequency supported by the UC2714D?

The UC2714D is characterized for operation up to 1 MHz, with typical propagation delays of 35–100 ns and rise/fall times under 60 ns into specified capacitive loads. Its timing architecture and drive strength maintain signal integrity and dead-time accuracy across this full range, making it suitable for high-frequency DC-DC converters where switching loss reduction is critical. The UC2714D datasheet confirms performance validation at 1 MHz under recommended operating conditions.

How does the UC2714D implement zero-voltage switching without external components?

The UC2714D uses its T1 and T2 pins for true zero-voltage sensing: pulling either pin below ~2.5 V (e.g., via a resistor divider from a switch node) immediately triggers the corresponding output-AUX on T1 low, PWR on T2 low-bypassing programmed delay. This allows direct, comparator-free ZVS activation synchronized to actual voltage zero-crossings. The UC2714D internal circuitry detects sub-threshold voltage on these pins and asserts outputs within nanoseconds.

What is the functional difference between UC2714D and UC2715D?

The UC2714D features an inverted AUX output, enabling direct drive of p-channel MOSFETs, while the UC2715D provides non-inverted AUX and PWR outputs for true-complementary N-channel FET drive. Both share identical timing, drive strength, pinout, and package. The UC2714D is selected when the auxiliary switch is p-channel; UC2715D is required when both switches are n-channel and must switch with opposite polarity.

Does the UC2714D require external pull-up or pull-down resistors on its outputs?

No-UC2714D's PWR output includes a built-in self-biased circuit that holds it active-low during sleep mode (ENBL ≤ 0.8 V), eliminating need for external pull-downs. Neither PWR nor AUX requires external pull-ups, as both are actively driven high/low. Input pins (INPUT, ENBL) have internal biasing compatible with TTL sources; no external termination is required for proper logic-level operation of UC2714D.

What package type and RoHS status does the UC2714DTR.A variant use?

The UC2714DTR.A is supplied in an 8-pin SOIC (D) package with NiPdAu lead finish, RoHS-compliant, moisture sensitivity level (MSL) 2 (250°C peak reflow, 1-year floor life), and shipped in large tape-and-reel format (2500 units per reel). Its marking is "UC2714D", and pin 1 orientation follows quadrant Q1 per JEDEC standards-fully compatible with automated SMT assembly used for UC2714D.