Texas Instruments UC2715N

Overview

UC2715N 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 across –40°C to +85°C and supports up to 1 MHz switching in DC/DC converters and forward topologies.

For engineers reviewing the UC2715N datasheet, UC2715N pinout, UC2715N application, or UC2715N equivalent, this page delivers verified timing behavior, zero-voltage sensing capability, true-complementary output configuration, thermal limits, and real-world use cases in synchronous rectifiers and active reset circuits - all critical for gate-drive timing integrity and soft-switching design validation.

Technical Context

The UC2715N implements dual independent delay timers (T1 and T2) that control dead-time between AUX and PWR outputs using external resistors to ground; T1 sets AUX-to-PWR turn-on delay (50–500 ns), while T2 sets PWR-to-AUX turn-off delay (50–500 ns). Each timer pin has internal 3-V nominal voltage reference and ±2-mA current limiting.

Its true-complementary output architecture ensures non-overlapping drive waveforms: PWR switches on after T1 delay following INPUT rising edge and turns off immediately on INPUT falling edge; AUX switches on immediately at INPUT rising edge and turns off after T2 delay following INPUT falling edge. ENBL enables 220-μA sleep mode with PWR held low regardless of VCC.

Key Specifications

Pinout & Package

UC2715N is housed in an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch (2.54 mm), compatible with standard PCB layouts and manual soldering processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UC2715D and UC3715N, the UC2715N offers through-hole manufacturability and industrial temperature qualification - making it uniquely suited for field-replaceable power modules, ruggedized telecom supplies, and legacy board upgrades where thermal margin and mechanical robustness are prioritized over SMT density.

Availability

UC2715N is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, and synchronous rectifier modules requiring stable component supply and long-term obsolescence management.

Supply support for UC2715N 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 decades of expertise in high-reliability power conversion ICs.

The UC2715N belongs to TI's Complementary Switch FET Driver product line, engineered specifically for zero-voltage switching topologies including forward converters, active clamp circuits, and synchronous rectifiers in industrial and telecom infrastructure.

FAQ

What is the maximum operating frequency supported by the UC2715N?

The UC2715N is characterized for operation up to 1 MHz, with typical propagation delays of 35–100 ns and rise/fall times under 60 ns into 2200-pF loads. This performance enables reliable use in high-frequency DC/DC converters such as telecom brick supplies and compact AC/DC adapters where switching speed directly impacts size and efficiency.

How does the UC2715N implement zero-voltage switching (ZVS) support?

The UC2715N supports ZVS through its T1 and T2 pins, which double as true-zero voltage sensors: pulling either pin below ~2.5 V immediately activates the corresponding output, bypassing programmed delay. This allows direct detection of transformer reset or resonant node zero-crossing without external comparators - a key enabler for soft-switching in forward and LLC topologies.

What is the difference between UC2715N and UC1715N in terms of output configuration?

The UC2715N uses a true-complementary output configuration where both PWR and AUX are non-inverted, enabling direct drive of two N-channel MOSFETs. In contrast, the UC1715N inverts the AUX output to drive a P-channel device. This makes UC2715N ideal for fully N-channel synchronous rectifier designs, while UC1715N suits mixed-channel configurations.

Can the UC2715N operate with a 5-V supply?

No - the UC2715N requires a minimum VCC of 7 V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 7 V risks improper logic levels, reduced drive strength, and undefined timing behavior. A 12-V or 15-V rail is recommended for full-spec performance across temperature.

Is the UC2715N pin-compatible with other devices in the UCx71x family?

Yes - UC2715N shares identical 8-pin PDIP pinout and function mapping with UC2714N, UC3714N, and UC3715N. However, timing ranges, temperature grades, and output polarity differ: UC2714/UC3714 feature inverted AUX, while UC2715/UC3715 provide true-complementary outputs. Always verify timing and thermal specs before substitution.