Texas Instruments UCC27712DR

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 considerations include its 620-V HB rating, 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 in bridge configurations.

It employs TI's high-voltage process for robustness: 700-V absolute max on HB pin, –11 V to +600 V operation on HS node, UVLO protection on both VDD (8.9 V turn-on) and HB–HS (8.2 V turn-on), and large NTSOA on the switch node to withstand negative transients during hard switching.

Key Specifications

Pinout & Package

UCC27712 is housed in an industry-standard SOIC-8 package (3.91 mm × 4.90 mm), 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 IRS2004STRPBF and LM5109BMAX/NOPB, the UCC27712 delivers superior system-level robustness through integrated interlock, 2.8-A sink capability, and 50 V/ns dv/dt immunity-enabling simpler, more reliable designs in 600-V industrial and telecom power stages without external protection components.

Availability

UCC27712 is available at Aetrix Electronics and suitable for motor drives, offline AC/DC power supplies, industrial inverters, and telecom rectifiers requiring stable component supply and long-term production continuity.

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 bridge-based power systems including motor inverters, server PSUs, and renewable energy converters.

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 recommended operation up to 620 V. This 80-V margin accommodates transient overvoltages in 600-V bus applications. Operation beyond 620 V risks exceeding safe operating area limits, especially during fast dv/dt events. The device's 50 V/ns immunity helps maintain stability under such conditions, but sustained voltage above 620 V is not advised per datasheet specifications for UCC27712.

Does the UCC27712 support 100% duty cycle operation?

Yes, the UCC27712 supports 100% duty cycle operation provided the HB–HS bootstrap voltage remains above its 8.2-V UVLO turn-on threshold. This requires careful design of the bootstrap network-including capacitor sizing (typically ≥10× gate capacitance) and diode selection-to sustain voltage during extended high-side conduction. The UCC27712's low 255-µA quiescent current aids in maintaining HB voltage under static conditions, making it viable for applications like PFC pre-regulators where continuous HO activation is required.

How does the interlock function work in the UCC27712?

The UCC27712 implements hardware-based interlock logic that guarantees a minimum 100–200 ns deadtime between HO and LO transitions, regardless of input timing. When both HI and LI are high, both outputs force low. If HI goes high while LI is still high, HO remains off until LI goes low and the internal deadtime timer expires. This prevents shoot-through in bridge circuits without relying on controller-level timing precision. The interlock is intrinsic to UCC27712's silicon design and requires no external components or configuration.

Can the UCC27712 drive SiC MOSFETs or GaN HEMTs?

Yes, the UCC27712 can drive SiC MOSFETs and GaN HEMTs effectively due to its 2.8-A sink / 1.8-A source peak current, 100-ns propagation delay, and 50 V/ns dv/dt immunity-key requirements for fast-switching wide-bandgap devices. Its –5 V to 24 V input range simplifies interface with 3.3-V or 5-V gate drivers or digital controllers. However, layout best practices (minimized loop inductance, Kelvin source connections) remain critical to fully realize switching benefits and avoid oscillation in UCC27712-driven SiC/GaN stages.

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

The HS (high-side source) pin on the UCC27712 serves as the return path for the floating high-side driver channel and is directly connected to the source/emitter of the high-side power switch. It withstands –11 V to +600 V relative to COM, enabling operation in high dv/dt environments. Unlike ground-referenced pins, HS must be routed with low inductance and serve as the local reference for the HO output and HB bypass capacitor. Its robust NTSOA rating protects against negative transients during hard commutation-a critical feature for reliable UCC27712 deployment in bridge topologies.