Texas Instruments UC2715D

Overview

UC2715D from Texas Instruments is a high-speed complementary switch FET driver IC designed for synchronous rectification and active clamp/reset circuits. It delivers 1-A source / 2-A sink power output and 0.5-A source / 1-A sink auxiliary output, with independently programmable 50–500-ns delays (T1/T2), 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 applications in DC-DC converters.

For engineers reviewing the UC2715D datasheet, UC2715D pinout, UC2715D application, or UC2715D equivalent, key selection considerations include its dual-delay timing architecture, true-zero-voltage sensing capability on T1/T2 pins, complementary N-channel FET drive configuration, and thermal-limited operation up to 150°C junction temperature.

Technical Context

The UC2715D implements a two-output, delay-programmable 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 via external resistors to GND on T1 and T2 pins, with nominal internal voltage of 3 V and ±1 mA current limiting.

It features TTL-compatible input thresholds (0.8–2.0 V), ENBL logic-level enable (1.2 V threshold), and self-biased PWR output that remains active-low during sleep mode (ENBL ≤ 0.8 V). Propagation delays are typ. 35–100 ns, and maximum switching frequency is 1 MHz under specified load and thermal conditions.

Key Specifications

Pinout & Package

UC2715D is housed in an 8-pin SOIC (D) package with standard 1.27-mm pitch and JEDEC MS-012AC outline. Pin 1 is located at the top-left corner with notch or mark indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UC2714D and UC3715D, the UC2715D uniquely supports true complementary N-channel drive across –40°C to +85°C with 260°C reflow compatibility-making it the only option for robust industrial synchronous rectification and active clamp designs requiring dual-N-FET timing control.

Availability

UC2715D is available at Aetrix Electronics and suitable for forward converters, synchronous rectifiers, LLC resonant reset circuits, and isolated gate driver interfaces requiring stable component supply and long-term industrial lifecycle support.

Supply support for UC2715D 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 UC2715D belongs to TI's complementary FET driver product line, engineered specifically for zero-voltage switching topologies in industrial and telecom power conversion systems requiring precise dual-output timing and robust gate drive.

FAQ

What is the operating temperature range for the UC2715D?

The UC2715D is specified for operation from –40°C to +85°C ambient temperature. Its junction temperature can reach up to 150°C under continuous load, making it suitable for industrial power supplies, telecom rectifiers, and other thermally demanding applications where the UC2715D maintains full timing accuracy and drive strength across the full range.

How does the UC2715D implement zero-voltage switching support?

The UC2715D supports zero-voltage switching through its T1 and T2 pins, which provide true zero-voltage sensing capability: pulling either pin below ~2.5 V immediately triggers the corresponding output (AUX or PWR), bypassing programmed delay. This allows direct detection of drain-source voltage collapse in synchronous rectifiers or active clamp circuits without external comparators-enabling adaptive timing in the UC2715D.

Can the UC2715D drive both high-side and low-side N-channel MOSFETs in a half-bridge?

Yes-the UC2715D is explicitly designed for true complementary N-channel drive. Its PWR and AUX outputs operate with independent, programmable delays and are configured to avoid shoot-through while enabling precise dead-time control. When used with bootstrap or isolated gate drive for the high-side, the UC2715D provides the timing intelligence and current drive needed for robust half-bridge operation in the UC2715D.

What is the purpose of the ENBL pin on the UC2715D?

The ENBL pin on the UC2715D enables low-power sleep mode: when pulled to ≤0.8 V, it reduces ICC to 220 μA typical while forcing the PWR output active-low. This feature allows system-level power sequencing and standby control without external circuitry. The UC2715D resumes full operation within nanoseconds when ENBL rises above 1.2 V, maintaining responsiveness in burst-mode or light-load conditions.

How are the T1 and T2 delay times set on the UC2715D?

T1 and T2 delays on the UC2715D are set using external resistors from each pin to GND. With RT = 100 kΩ, delays range from ~350 ns to 700 ns; with RT = 10 kΩ, delays shrink to 20–80 ns. The internal current source holds nominal voltage at 3 V, and delay scales linearly with resistance. This resistor-based method gives designers repeatable, layout-friendly dead-time tuning in the UC2715D without trimming or calibration.