Texas Instruments UC2715DTR

Overview

UC2715DTR 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 with ENBL-controlled 220-μA sleep mode. It operates across –40°C to +85°C in SOIC-8 packaging for DC-DC converters and forward topology power supplies.

For engineers reviewing the UC2715DTR datasheet, UC2715DTR pinout, UC2715DTR application, or UC2715DTR equivalent, key selection criteria include dual-output timing control, zero-voltage sensing via T1/T2 pins, rail-to-rail output saturation voltage specs, propagation delay consistency at 1 MHz, and compatibility with N-channel synchronous rectifier gate drives in isolated topologies.

Technical Context

The UC2715DTR implements a two-stage timing architecture: INPUT rising edge triggers AUX immediately and initiates T1 delay before PWR turn-on; INPUT falling edge turns off PWR immediately and initiates T2 delay before AUX reactivation. Internal timing capacitors are charged via external resistors on T1/T2 pins, with nominal 3-V threshold and ±1-mA current limiting.

Each output stage uses dedicated bipolar/MOS hybrid drivers: PWR delivers 1-A source/2-A sink peak current with <0.8 V low-state saturation at 400 mA, while AUX provides 0.5-A source/1-A sink with <0.8 V low-state saturation at 200 mA. ENBL enables 220-μA sleep mode where PWR remains active-low regardless of VCC.

Key Specifications

Pinout & Package

UC2715DTR 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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UC2715DTR, UC2714DTR requires redesign of auxiliary-side gate drive polarity and cannot replicate true complementary timing, while UC3715DTR imposes thermal derating above 70°C ambient-neither offers pin-compatible replacement without validation of timing margins and thermal performance.

Availability

UC2715DTR is available at Aetrix Electronics and suitable for forward converters, synchronous rectifiers, active clamp reset circuits, and LLC resonant gate drive applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for UC2715DTR 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 power IC innovation.

The UC27xx family was engineered specifically for high-efficiency, high-frequency switched-mode power supplies requiring precise complementary gate drive with programmable dead time and zero-voltage detection capability.

FAQ

What is the maximum operating frequency supported by the UC2715DTR?

The UC2715DTR is characterized for reliable operation up to 1 MHz, with typical propagation delays of 35 ns for both PWR and AUX outputs and rise/fall times under 60 ns into 2200-pF loads. This allows clean square-wave gate drive with minimal timing skew in high-frequency DC-DC converters and resonant topologies where switching periods fall below 1 µs.

How does the UC2715DTR implement zero-voltage switching (ZVS) support?

The UC2715DTR supports ZVS through true zero-voltage sensing on its T1 and T2 pins: pulling either pin below 2.5 V immediately activates the corresponding output, bypassing the programmed RC delay. This enables instantaneous AUX or PWR turn-on when drain-source voltage crosses zero-critical for soft-switching transitions in forward, flyback, and LLC converters.

What is the function of the ENBL pin on the UC2715DTR?

The ENBL pin on the UC2715DTR is an active-high TTL-compatible enable input that places the device into a 220-μA sleep mode when held ≤0.8 V. In this state, the PWR output is forced active-low regardless of VCC or INPUT state, while AUX enters high-impedance-ensuring safe, low-power shutdown without external pull-downs or logic.

Can the UC2715DTR drive both N-channel and P-channel MOSFETs simultaneously?

The UC2715DTR is optimized for N-channel FETs on both outputs: PWR sources 1 A/sinks 2 A, and AUX sources 0.5 A/sinks 1 A, with both outputs referenced to GND. Driving a P-channel device on AUX would require level-shifting circuitry, as the UC2715DTR does not provide high-side floating drive or inverted AUX polarity-unlike the UC1714 series.

What package type and moisture sensitivity level (MSL) does the UC2715DTR use?

The UC2715DTR is supplied in an 8-pin SOIC (D) package with NIPDAU lead finish and JEDEC MSL Level-2 rating (260°C peak reflow, 1-year floor life). Its reel packaging (2500 units per large tape-and-reel) complies with IPC-7351 standards and supports automated SMT assembly without baking requirements under standard handling conditions.