Texas Instruments UCC27712D

Overview

UCC27712 from Texas Instruments is a 620-V high-side/low-side gate driver IC with 1.8-A source / 2.8-A sink peak output current, designed to drive power MOSFETs or IGBTs in half-bridge and full-bridge topologies. It features interlocked dual inputs (HI/LI), 150-ns internal deadtime, 100-ns typical propagation delay, and operates across –40 °C to +125 °C for motor drives and offline AC/DC power supplies.

For engineers reviewing the UCC27712 datasheet, UCC27712 pinout, UCC27712 application, or UCC27712 equivalent, key selection criteria include its 620-V HB withstand capability, dv/dt immunity of 50 V/ns, negative input tolerance down to –5 V, bootstrap-compatible floating HO channel, and SOIC-8 package compatibility with industrial layout constraints.

Technical Context

The UCC27712 integrates one ground-referenced low-side driver (LO) and one floating high-side driver (HO) with independent TTL/CMOS-compatible inputs (HI, LI). Its interlock logic enforces minimum 100–200 ns deadtime between HO and LO transitions, preventing shoot-through even under mismatched input timing.

It employs TI's high-voltage process enabling robust operation up to 600 V on HS node, 700 V absolute max on HB, and supports bootstrap biasing with HB–HS UVLO (7.2–9.2 V turn-on threshold). Input stage includes internal pull-downs to force low outputs during floating conditions and tolerates –11 V on HS and –5 V on HI/LI pins.

Key Specifications

Pinout & Package

UCC27712 is housed in an industry-standard SOIC-8 package (3.91 mm × 4.90 mm body size), optimized for thermal performance and PCB layout simplicity in high-voltage power stages.

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 LM5113MMX/NOPB, the UCC27712 delivers superior voltage rating, integrated interlock, tighter timing control, and enhanced transient robustness - making it optimal for demanding 600-V bridge applications where reliability and layout simplicity are critical.

Availability

UCC27712 is available at Aetrix Electronics and suitable for motor drives, offline AC/DC power supplies, industrial inverters, and high-density SMPS requiring stable component supply across extended temperature and high-voltage stress conditions.

Supply support for UCC27712 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 solutions.

The UCC27712 belongs to TI's high-voltage gate driver product line, engineered specifically for robust, high-efficiency switching in 600-V bridge topologies used in industrial motor control and server/telecom power systems.

FAQ

What is the maximum allowable voltage on the HB pin of the UCC27712?

The UCC27712 specifies an absolute maximum HB voltage of 700 V with respect to COM. This rating provides design margin for transient overvoltage events in 600-V bus applications. Continuous operation is supported up to 620 V on HB, and the device maintains functional integrity across –40 °C to +125 °C ambient temperature. The HB–HS UVLO threshold is 7.2–9.2 V, ensuring reliable bootstrap recharge before high-side activation.

Does the UCC27712 require external deadtime circuitry?

No, the UCC27712 includes internal interlock logic that guarantees a minimum 100–200 ns deadtime between HO and LO transitions when HI and LI are driven complementarily. This eliminates the need for external deadtime generators or RC networks. The interlock activates automatically - no configuration or external components are required - simplifying PCB layout and improving system reliability in half-bridge and full-bridge topologies.

Can the UCC27712 drive both MOSFETs and IGBTs?

Yes, the UCC27712 is qualified to drive both power MOSFETs and IGBTs. Its 1.8-A source / 2.8-A sink peak output current supports fast gate charging/discharging for devices with gate charges up to ~50 nC. Recommended VDD is 10–17 V for MOSFETs and 10–20 V for IGBTs; HB–HS bias follows the same ranges. The device's –11 V HS tolerance and large NTSOA further enhance robustness with IGBTs during Miller-induced voltage excursions.

What is the purpose of the COM pin on the UCC27712?

The COM pin serves as the ground reference for the low-side driver (LO), input logic (HI/LI), and VDD supply. It is not tied to power system ground in floating configurations - instead, it forms the local return path for the low-side channel. All input thresholds and output voltages are defined relative to COM. Proper decoupling of VDD to COM with ≥0.1 µF ceramic capacitance is mandatory to maintain noise immunity and UVLO stability.

How does the UCC27712 handle floating input pins?

The UCC27712 incorporates internal pull-down resistors on both HI and LI inputs, forcing LO and HO low respectively when either input is left unconnected or floating. This fail-safe behavior prevents unintended power device activation during startup, controller reset, or signal loss. The feature is intrinsic to the IC's input stage design and requires no external components - enhancing system safety in motor drive and power supply applications.