Texas Instruments UCC27714D

Overview

UCC27714 from Texas Instruments is a 600-V high-side/low-side gate driver IC with independent TTL/CMOS-compatible inputs, 4-A peak source/sink output current at VDD = 15 V, 125-ns maximum propagation delay, and −40°C to 125°C operating range in SOIC-14 package. It drives power MOSFETs or IGBTs in half-bridge and full-bridge topologies for offline AC/DC power supplies.

For engineers reviewing the UCC27714 datasheet, UCC27714 pinout, UCC27714 application, or UCC27714 equivalent, key selection criteria include bootstrap-capable floating high-side channel (HS up to 600 V), matched propagation delay (≤20 ns), dual UVLO protection (VDD and HB–HS), rail-to-rail drive, and robust negative transient immunity (−8 V on HS pin).

Technical Context

The UCC27714 integrates two independent gate-drive channels: ground-referenced LO and floating HO powered via bootstrap (HB–HS). Its logic inputs (HI/LI) directly control each output without internal cross-conduction prevention, requiring external PWM timing coordination. The device uses separated grounds-VSS for logic and COM for low-side driver return-with capability to sustain voltage difference between them.

UVLO circuitry independently monitors VDD–VSS (turn-on threshold 9.1 V typical, hysteresis 0.5 V) and HB–HS (turn-on threshold 8.3 V typical, hysteresis 1.0 V). Outputs default LOW when HI/LI are floating, and EN/NC pin enables/disables both channels simultaneously with internal pull-up to VDD.

Key Specifications

Pinout & Package

UCC27714 is housed in a 14-pin SOIC package (3.91 mm × 8.65 mm body size) with creepage-optimized pin spacing for high-voltage isolation. Pin 1 (HI) through Pin 14 (NC) follow standard SOIC top-view numbering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side/low-side gate driver applications.

Compared with IRS21844PbF and LM5109BMAX, the UCC27714 provides superior timing accuracy (≤125 ns / ≤20 ns), higher drive strength (±4 A), integrated dual UVLO, and enhanced −8-V HS transient tolerance-making it optimal for high-density, high-efficiency bridge converters demanding precise synchronization and reliability.

Availability

UCC27714 is available at Aetrix Electronics and suitable for high-density server PSUs, solar inverters, and industrial motor drives requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for UCC27714 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 company specializing in analog, embedded processing, and power management solutions, with leadership in high-reliability industrial and automotive-grade components.

The UCC27714 belongs to TI's high-voltage gate driver product line, designed specifically for high-efficiency, high-frequency bridge-based power conversion in offline AC/DC, solar, UPS, and motor control systems.

FAQ

What is the maximum allowable voltage on the HS pin of the UCC27714?

The UCC27714 supports a maximum DC voltage of 600 V on the HS pin, enabling use in high-voltage half-bridge and full-bridge topologies. Transient voltage on HS is limited to −2 V to +0.3 V relative to HB for durations under 100 ns. This rating is validated across the full −40°C to 125°C junction temperature range and forms the basis for its qualification in offline AC/DC and solar inverter applications.

Does the UCC27714 require external pull-up or pull-down resistors on HI and LI inputs?

No, the UCC27714 includes internal 400-kΩ pull-down resistors on both HI and LI inputs, ensuring LO and HO remain LOW when those inputs are floating or un-driven. This eliminates the need for external biasing components in most designs and enhances system safety during controller initialization or fault conditions. The UCC27714 also features an internal pull-up on EN/NC, simplifying enable functionality.

How does the UCC27714 handle bootstrap supply undervoltage conditions?

The UCC27714 implements dedicated UVLO protection on the HB–HS supply, with turn-on threshold of 8.3 V (typical) and hysteresis of 1.0 V. When HB–HS falls below the turn-off threshold (7.25 V typical), HO is forced LOW while LO remains operational-allowing LO to recharge the bootstrap capacitor. This asymmetric UVLO behavior ensures self-recovery capability and avoids latch-up in sustained low-duty-cycle or high-frequency bootstrap applications.

Can the UCC27714 drive both MOSFETs and IGBTs effectively?

Yes, the UCC27714 is explicitly characterized and qualified to drive both power MOSFETs and IGBTs. Its ±4-A peak output current, rail-to-rail drive capability, and fast 15–30 ns rise/fall times (with 1000-pF load) provide sufficient gate charge delivery for typical gate charges in 600-V-class devices. The datasheet confirms performance with both device types across recommended operating conditions, including VDD = 15 V and TJ = 125°C.

What is the purpose of the separate VSS and COM pins on the UCC27714?

The UCC27714 separates VSS (logic ground) and COM (low-side driver return) to isolate digital control circuitry from high-current switching paths. This separation prevents noise coupling from LO switching transients into the input logic domain, improves noise immunity, and allows the device to sustain voltage differences between VSS and COM-critical for stable operation in noisy industrial power systems. The datasheet specifies that VSS can range from −6 V to +5 V relative to COM.